How To Turn Off Navien Tankless Water Heater?

How To Reset Navien Tankless Water Heater? Admirable Complete Guide

  • You have a water heater that isn’t operating correctly, or it’s flashing an unusual number on the display that you’re not sure what it signifies.
  • What if you need instructions on how to reset a Navien tankless water heater?
  • If this is the case, this tutorial is for you.
  • It is certain that your tankless water heater may encounter an unexpected Navien error code 110 at some point, just like any other household device.

Unfortunately, it always occurs at an inopportune time of day.When an issue occurs, an error code will be shown on the device’s LCD display on the front panel.It is, without a doubt, an unpleasant experience, but it will assist you in determining what is wrong with your unit when it fails.

  1. You will be able to take appropriate action to remedy the situation at the appropriate moment.
  2. There are a plethora of different Navien error codes e351 that may be used to assist in the resolution of the issue.
  3. Some problems can be resolved by simply resetting the machine, while others will need further effort.
  4. It is the purpose of this post to offer you with extensive information on Navien flow sensor issues and error codes, as well as their significance and recommended solution.

You can usually troubleshoot a problem on your own with the help of a few tools, but if the problem is difficult, you will need to get expert help.

How To Reset Navien Tankless Water Heater? Error Codes Breakdown

Tankless machines use sophisticated technology, which means that faults and difficulties might arise at any time. We will provide you with a summary of the various Navien water heater problem codes, as well as their remedies, below.

Error Code E003

The Navien error code 003 and how to resolve it implies that your device has experienced an ignition failure.

  • Ensure the main gas supply valve is open. 

Error Code E004

In this case, it signifies that your gadget has detected a fake flame.

  • Make sure the major electrical cord is grounded correctly.

Error Code E012

It informs you that there has been a loss of flame.

  • Remove the intake filter and thoroughly clean it with a brush while it is submerged in running water. Before removing the filter, be sure the power is turned off. Allow it to dry for a period of time before attempting to repair it again.
  • Additionally, check to see if the electrical cord is correctly grounded or not.

Error Code E016

It indicates that the heat exchanger has been overheated.


Turn off the appliance for half an hour and then turn it back on again. Examine and clean the filter in a cold water inlet before using it again. Aside from that, you must also flush the heat exchanger.

Error Code E030

It alerts you to the fact that the exhaust is overheated. When the temperature of the flue pipe reaches 149 degrees Fahrenheit, the heater shuts off automatically.

  • Turn off the gadget and wait 30 minutes before turning it back on.
  • Remove the inlet filter and wash it under running water with a brush to remove any remaining residue.
  • Navien nr-240a user manual contains instructions on how to flush the heat exchanger and how to reset the remote control for your Navien tankless water heater.

Error Code E046

If this occurs, it shows that something is amiss with the limit control.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E047

It notifies the user of an anomaly with the exhaust thermostat.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E060

When you see this code displayed on your screen, it is imperative that you obtain information on how to reset your Navien tankless water heater. The number indicates that the Dual venturi is operating in an unexpected manner.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E109

It offers information on the nature of the problem with the motor of the fan.


Using a toothbrush, thoroughly inspect and clean the intake air filter while it is running under running water. Allow it to dry completely before putting it back together.

Error Code E110

The Navien error number 110 indicates that there is an abnormally high level of air pressure.


Check to see that the exhaust pipe is not clogged at all. Remove the intake filter from the heater once it has been checked. It should be washed under running water with a brush, dried, and then re-positioned.

Error Code E127

There is a problem with the air pressure sensor, which indicates a faulty sensor. It is caused by a faulty air pressure sensor that is either open or shorted.


Immediately shut down the equipment and evaluate its internal condition. How to reset a Navien tankless water heater may be found in the owner’s handbook. If the problem remains even after a reset, the APS should be replaced as quickly as feasible.

Error Code E205

This error number informs the user that the heating supply thermistor is operating in an unexpected manner. It can be caused by a thermistor that is open or shorted.


Examine the condition of the thermistor and the connections for the pump’s wiring.

Error Code E218

There is a problem with the heating return thermistor, as evidenced by this message. It is possible that an open or shorted thermistor is the source of this issue.


Check the condition of the thermistor, as well as the wiring connectors for the pump.

Error Code E302

It provides information on the low water pressure that has been detected.


The water feeder valve, water pressure, and water pressure release valve should all be inspected. If required, replace them all at the same time.

Error Code E352

The presence of this number implies that the water pressure is strong.


If this code is shown on your system, you should check to see that the water pressure is within acceptable levels. Check the operation of the feeder valve and the pressure relief valve, as well.

Error Code E353

It indicates that there is a problem with the water pressure sensor. It can arise as a result of a sensor that is open or short.


Ensure that the pressure sensor and wires are in proper working order by visually inspecting them. Check to see that there are no sloppy connections. If the sensor needs to be replaced, you can do so.

Error Code E407

It is a sign that the thermistor in your warm water outlet is malfunctioning in some way. It is usually caused by a sensor that is either open or shorted.


Examine the wiring and the condition of the thermistor. If necessary, replace the thermistor.

Error Code E421

It indicates that the cold water intake 1 thermistor is not functioning properly.


Check to see that the thermistor and wires are in excellent working order. If required, you can adjust the temperature of the cold water inlet thermistor.

Error Code E432

It is a visual indication that the cold water inlet 2 thermistor in your device is experiencing problems.


Check the wiring and the cold water inlet 2 thermistor to ensure that they are both in good working order. Replace the thermistor if it is necessary.

Error Code E434

A malfunctioning water adjustment valve is indicated by this error indication.


Shut off the machine and examine the wiring and overall condition of the valve. If you require the services of a plumber, you can do so.

Error Code E438

This indicates that the circulation pump is not functioning correctly.


Check to see that all return and supply lines are open, as well as the direction of the 2-way valve.

Error Code E439

It alerts you to the fact that the flow sensor is not functioning properly.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E441 And E445

The error number E441 indicates that there is an open thermistor or a short circuit in the system. The bypass mixing valve has failed, as shown by the diagnostic code E445 on the computer.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E480

It informs you of the presence of an irregularity in the external tank thermistor. This problem is caused by an open or shorted sensor.


It is necessary to visually verify the sensor’s connectors to ensure that they are not damp and that they are properly secured. If the tank thermistor has to be replaced, you can do so.

Error Code E515

This code indicates that the PCB is performing in an unexpected manner.

  • Make sure the electrical cord is grounded.

Error Code E517

It demonstrates that there are some issues with the DIP switch setup.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E593 and E615

The E593 error number indicates that there is a problem with the front panel key. The E615 informs you of any irregularities in the input and memory data.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E736 and E740

The error number E736 indicates that there is a problem with the cascade communication, and the error code E740 indicates that the outside temperature sensor is not functioning properly.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E760 And E782:

The E760 alerts you that it is time to cleanse your heating system. Furthermore, the E782 indicates that there is a problem with the communication between the main panel and the computer.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E783:

It indicates that there is a problem with the operation of the OT-remote controller.


Examine the controller’s condition and, if necessary, replace the device.

Error Code E785

This indicates that there is a problem with the flow sensor or switch.


Call 800-519-8794 to get in contact with Navien technical assistance.

Error Code E787

This error message warns you that something is wrong with the device while you are resetting it.


For half an hour, turn off the gadget and check to make sure everything is functioning properly. After that, turn it back on. If the problem continues, ask a professional to come out and repair the device.

Common Issues Of Navien Tankless Heater

  • Navien is a well-known manufacturer of high-quality water heaters across the world.
  • Initially, their goods were not up to par and had a slew of unanticipated issues; however, they have since improved, and faults are becoming less frequent.
  • If you are still using an older Navien model, the following are potential issues that you may encounter in the future or have already encountered.
  • Cracking of the Heat Exchanger It is not a frequent problem, but it is one that you should be aware of.

When the heat exchanger begins to fracture, it indicates that there is a leak, and potentially harmful exhaust gases might enter your home.Because it is not possible to repair the heat exchanger, you will have to replace it.Because the heat exchanger is covered by a guarantee, you should contact the manufacturer.

Motherboard Or Control Board Failure

  • The failure of the motherboard, also known as the control board, is common.
  • Both are the ″brains″ of the unit, and they are responsible for receiving and transferring information throughout the heater.
  • This implies that the gadget is experiencing a serious problem when both of them quit operating at the same time.
  • This is a problem that happens regularly in earlier models.

This is an issue that is readily identified.Your system will cycle through its various settings repeatedly.The display screen will show Navien error code 003 how to solve if it does not turn on and off as it should.

  1. This code notifies you that your ignition has failed.
  2. The most effective technique to address this issue is to switch off the heater for a short period of time and then resume it.
  3. If the problem persists, the control board should be replaced, or the plumber should be contacted for assistance.

Corrosion Of Navien Flow Sensor Problems

  • When it comes to the brand’s older models, this is the most aggravating issue.
  • The flow sensors were constructed of materials that were susceptible to rusting.
  • In a tankless appliance, a flow sensor is an essential part of the system.
  • It detects the presence of incoming water flow and subsequently activates the water heater.

When the flow sensor becomes corroded, the equipment will automatically stop off.Corrosion buildup will eventually become a source of decreased performance.It is a transient issue that may be resolved in a matter of minutes.

  1. Turn off the device and look for the flow sensor, which you should remove and blow on it.
  2. Return it to its original position and turn on the unit.
  3. The flow sensor materials were changed by the manufacturer, which resolved the issue.
  4. Nowadays, they make use of stainless steel, which is resistant to corrosion.

Unless you have an older heater, you should replace the flow sensor with a more recent one; otherwise, a 5-micron filter should be installed in the unit.

Navien Tankless Water Heater How To Reset

  • If your device is not functioning properly and is not displaying any error codes, you can do a factory reset on it. Resetting is simple and does not necessitate the use of any special tools or plumbing knowledge. Identify and press the reset button located on the heater’s front control panel (see illustration). It may be found in the bottom right corner, directly across from the on and off button. To reset your smartphone, press and hold the reset button. If, on the other hand, you’ve done everything and are still having trouble, call a plumber. Conclusion: Modern tankless water heaters are capable of producing an unlimited amount of hot water to meet the demands of the entire household. They are equipped with cutting-edge technology and are extremely energy efficient. However, they are not without flaws, and issues do arise from time to time. Fortunately, the manufacturer has given a plethora of error codes to assist you in quickly identifying the problem. If you are unable to determine the actual meaning of the Navien no hot water no error code, consult the user’s handbook or consult our tutorial on how to reset a Navien tankless water heater for assistance. More Information From Us: The best Takagi tankless water heaters, the best RV tankless water heaters, the best tankless water heater for radiant heat, and the best Rheem tankless water heaters are all excellent choices.

Navien Manuals:Tankless Water Heaters

  • Tankless water heater instructions might be difficult to understand.
  • Navien contractors from Hoffmann Brothers can assist you in identifying the highly technical terminology included in popular Navien water heater manuals and breaking it down into easily understandable words, highlighting the most important components for your Navien products.
  • Our objective is to make it clear when maintenance, repairs, or a replacement of your Navien tankless water heater may be necessary.
See also:  How To Know If Your Hot Water Heater Is Broken?

Download Navien Tankless Water Heater Manuals

  • We urge you to scroll down to any of these Navien water heater manuals for the popular NPE-Standard Series (S series) and NPE-Advanced Series for the most precise instructions and troubleshooting (A series).
  • A digital or printed copy of the relevant handbook should be kept near your water heater for personal reference in the event that maintenance or servicing is required.
  • Hoffmann Brothers and Navien manufacturers advocate doing so.

Navien Tankless NPE Manuals

Click on any of the images below to learn more about Navien’s outstanding condensing tankless water heaters. Please keep in mind that there are different Navien water heater manuals for the operation and the installation of the water heater.

Operation Manuals: Navien Standard Series

  • There is a manual for the Navien NPE-150S, a manual for the Navien NPE-180S, a manual for the Navien NPE-210S, and a manual for the Navien NPE-240S.

Operation Manuals: Navien Advanced Series

  • Navigation NPE-180A Manual
  • Navigation NPE-210A Manual
  • Navigation NPE-240A Manual.

Installation Manuals: Navien Standard Series

  • Navigation NPE-180A Manual, Navigation NPE-210A Manual, Navigation NPE-240A Manual

Installation Manuals: Navien Advanced Series

  • There is a manual for the Navien NPE-150S, a manual for the Navien NPE-180S, a manual for the Navien NPE-210S, and a manual for the Navien NPE-240S.

Navien Remote Control Manuals

  • Navien NR-20DU Manual

The Navien NPE-240A Manual Covers Entire NPE Series

  • The Navien NPE-A and NPE-S series condensing tankless water heaters are covered by the operational manuals listed above.
  • As a result, whether you’re looking for the Navien 240A manual, the Navien NPE-240S handbook, the Navien NPE-180A manual, or anything similar, you’ll discover the same information.
  • There is just one Navien water heater manual that applies to all NPE-A and NPE-S systems.
  • Our experts can assist you with any of the following for your Navien hot water unit, as well as explain and schedule servicing for you:

Essential Safety Information About Your Navien Product

  • How the Installation of Your Navien Water Heater Is Conducted The selection of the most appropriate installation location and the mounting to the wall
  • Gas, water, condensate drain, venting, and power are all connected in this system.
  • Instructions on how to set up a cascade system
  • Instructions on how to install a common vent system
  • Obtaining Crucial Information About Navien Water Heaters The Navien Water Heater is described in detail below.
  • Recognizing the many components of the water heater, as well as being acquainted with its front panel.
  • The way your Navien water heater works is as follows: Using the Water Heater
  • How to Turn the Water Heater On or Off
  • How to Make Adjustments to the Water’s Temperature
  • How to View the Most Basic Information
  • Tips on how to Reset a Water Heater
  • Your Navien hot water heater requires regular maintenance. The Best Way to Clean Your Water Heater
  • The best way to drain a water heater.
  • How to Flush the Heat Exchanger
  • How to Clean the Heat Exchanger
  • The Inlet Water Filter and the Recirculation Inlet Filter should be cleaned on a regular basis.
  • Instructions on how to clean the air intake filter
  • Instructions on how to keep your water heater from being iced over
  • Basic Problems Solved with Your Navien Water Heater
  • Identify and Understand Error Codes
  • Troubleshooting Your Navien Water Heater

Expert Installation, Repair and Maintenance of Your Navien Systems

  • The tankless water heater contractors at Hoffmann Brothers in St Louis can answer your inquiries and schedule service for your Navien tankless water heater whether you are ready to replace your Navien product, are experiencing an issue, or are receiving an error code.
  • Since 1978, we have been providing licensed and certified Navien tankless water heater installation, repair, and maintenance services to the residents of Missouri.
  • Our professionals have over 40 years of expertise in the industry and are dedicated to providing the best service possible.
  • For further information or to schedule servicing for your Navien system, contact Hoffmann Brothers at 314-664-3011.

How To Flush A Navien Tankless Water Heater

  • This video will show you how to flush a Navien tankless water heater.
  • To begin, switch off the service valves and disconnect the hoses from the system.
  • This error code can be resolved by turning off the device, emptying the water to release the pressure, and then turning it back on again.
  • If the problem persists, look into the condition of the device.

Connect the hose from valve ″a″ to a drain n that has been approved.The Navien error number e011 indicates that there is excessive pressure on the heating side of the system.

Start By Turning Off The Service Valves And Removing The Hoses.

It consists of flushing water through the system to remove calcium and other mineral deposits that have accumulated. If the problem persists, look into the condition of the device. In order to cut off the electricity to the water heater, press the power button on the front panel.

This Error Code May Be Fixed By Switching Off The Unit, Draining The Water To Release The Pressure, And Switching It Back On.

Detailed instructions on how to flush out a Navien tankless water heater. To empty the water heater, follow these steps: Turn off the gadget and wait 30 minutes before turning it back on.

Place A Bucket Under The Water Heater, To Collect The Residual Water Inside The Water Heater.

The quality of the boiler water should be checked, and heat exchangers should be cleansed if they are essential. Your Navion tankless water heater’s annual maintenance method is demonstrated in this video by Ray from water heaters. Then attach a pond pump and a garden hose to the valve that has been serviced.

The Average Cost To Flush A Tankless Water Heater Ranges From $100 To $200.

For example, you may dampen it and place it in a bathtub, pumping the water through the isolation side on the hot setting. One of them is sending out hot water at about 110 degrees, despite the fact that the temperature is set at 130. Remove the inlet filter and wash it under running water with a brush to remove any traces of dirt.

Tankless Water Heaters Help To Get Hot Endless Hot Water For Showers.

Procedure for flushing a Rinnai tankless water heater; No matter what type of gas tankless water heater you have, there are a few steps in the flushing process that must be completed in the proper order, but they are all rather straightforward to complete. Procedure for flushing a Notritz tankless water heater;

Tankless Water Heater and turning off main water supply

  • Tankless/combi will simply not start if there is insufficient flow (this is clearly stated on the tech label), and the minimum flow required to allow fire to light is often about 2L/min, which is inherent in their mode of working. The majority of them employ a microswitch to sense the flow and a temperature sensor to alter the flame, while some just monitor the flow and modify the flame in response. It is not necessary on DHW since some have a minimum pressure sensor and others do not. DDSDDS2,0597 silver badges14 bronze badges2,0597 silver badges14 bronze badges2,0597 silver badges Tankless systems are equipped with flow sensors, so if you are merely closing down the water supply valve and then reopening it, you shouldn’t be too concerned about causing a leak. Having said that, shutting down the water supply might cause changes in the pressure in the system as the temperature of the water changes over time. I don’t believe it would be a source of concern. However, every time the valve is closed, the water is no longer in the system. Installing a potable water expansion tank is a wise decision. This is an expansion tank for potable water. NPT is almost primarily used for 3/4″ NPT. You would need to use a gauge to measure your static pressure (the pressure that exists while the taps are closed and the main is open). Then, using a bicycle pump or, preferable, an air compressor, pump air into the air nipple (located at the bottom of the tank as shown above) to bring it up to the same static pressure as the tank before mounting it. Additionally, it is recommended that a service valve be installed. Posted on March 6, 2019 at 3:31 p.m. Joe Fala is an American football player who plays for the Los Angeles Lakers. Joe Fala has 6,0887 silver badges and 33 bronze badges to his credit. 4 Some are equipped with flow switches, while others are equipped with differential pressure switches. However, both are accomplishing the same thing: using no water and no heat. On March 6, 2019, at 5:30 p.m.
  • On the waterside, I’ve never been across one before. They must be able to deliver on their promises. Navien is the only software I use. They make use of a flow transducer/hall effect sensor to do this. I’ve made a few modifications. But I’ve put in hundreds of units throughout the years. In the garage, I’m still dealing with a defective sensor. I attach it to a 5vdc power source and an LED while blowing into it, and it knocks my kids’ socks off as they watch the light flicker in delight. Is it a variable pressure transducer, or something else? Or is it simply a switch with the gas being throttled by another sensor? On March 6, 2019, at 5:47 p.m.
  • It can be used as a variable transducer on some systems and as an on/off switch on others
  • in most cases, the second is used and the flame is adjusted by a temperature sensor
  • if the flow rate is used to determine the amount of heat required, boilers will not be able to guarantee the temperature at the output of the boiler. As an example, if the acquaduct is 5° and the boiler is set to 60°, the DHW may be 55°, but on a 20° acquaduct, the DHW may be 75° since the temperatures are calibrated with a 10°C intake. This type of control is often found on older, mechanical-only instant-boilers, whereas modern instant-boilers with ‘electronic control’ employ a temperature sensor and an on/off flow switch. at 8:44 a.m. on March 6, 2019
  • A tankless system also eliminates the requirement for an expansion tank because water is cold and heated only while the system is operating, resulting in no thermal expansion in a ″no-flow″ condition. at 8:47 a.m. on March 6, 2019

Should You Turn off a Tankless Water Heater When Going for Vacations?

  • The use of air conditioners When you go on a vacation, you have the opportunity to unwind and enjoy your time before returning to your regular responsibilities and responsibilities.
  • It is necessary, however, to double-check that everything is safe before leaving the house for several days.
  • Whether or whether you should turn off your tankless water heater while on vacation is a valid question.
  • The answer to this question is, without a doubt, that you should.

After all, failure to do so may result in floods, which will cause extensive damage.It’s possible that you’ll arrive home to find everything in disarray.However, there are also more benefits to shutting off your tankless water heater while you are away for the weekend.

Benefits of Turning Off Your Tankless Water Heater While on Vacation

  • Peace of mind.
  • Every time you think about your tankless water heater, which you failed to switch off, you are likely to experience uneasiness.
  • Imagine the degree of the destruction that it is capable of causing, and you will not be able to rest easy.
  • Whenever you leave the house, whether for a short period of time or for an extended period of time, it is essential to make certain that everything in your home is secure.
  • This provides you with the much-needed peace of mind while you are away on vacation.

Vacations are intended to be a time of rest and relaxation for both the mind and the body.As a result, make it a point to plan ahead of time.When you do this, you will be better able to deal with any challenges that may arise during your leisure time.

  1. Preventing Damage from Occurring
  • When you forget to switch off your tankless water heater before leaving for vacation, you put yourself and your family in a lot of danger.
  • It is possible for your tankless water heater to leak while you are away from home, resulting in flooding and water damage to your home.
  • It can also cause harm to your personal belongings, such as valuable papers and electronic goods.
  • It may be quite expensive and time-consuming to replace them.

Furthermore, depending on the level of damage, it might take a long time before your home is restored to its pre-water damage condition.Cost-Effective

  • When your tankless water heater has been in operation for a significant amount of time, perhaps ten or more years, it is time to replace it.
  • It will be in the last phases of development before becoming operational.
  • As a result, leaving your computer unattended while on vacation exposes you to greater threats than you would imagine.
  • When your tankless water heater reaches an advanced age, it is more prone to overheat and burn out.

The consequences of this might include damage that is difficult to repair.It’s possible that you have insurance for your tankless water heater system.Nonetheless, it is vital to ensure that you are familiar with all of the insurance policy provisions.

  1. You may be surprised to hear that there are several exceptions to the insurance coverage for your tankless water heater, some of which will prevent you from receiving full compensation in the event of an accident.
  2. For example, keeping your tankless water heater turned on for an extended length of time may be construed as negligence on your side.
  3. You are likely to bear the consequences of such activities, which may have been avoided.
  4. Nothing in life is inexpensive, including the installation or replacement of various components in your tankless water heater system.

Other repairs, such as rewiring, would need the services of a professional electrician, which will be pricey.In spite of the fact that his tankless water heater system was insured, you are unlikely to collect the whole cost of the damage.Those who do not have insurance coverage for their tankless water heater system will be subjected to increased fees, which will have a negative impact on their financial situation.Stress and inconvenient situations

  • When you return home after a well-deserved vacation, you’re almost always in a good mood.
  • If, on the other hand, you discover a mess in your house, this may alter.
  • This may be extremely stressful, not to mention inconvenient, in the long run.
  • If the damage is severe enough, you will not only need to have your house restored, but you will also need to locate temporary housing if the damage is that severe.

Instead of returning from your vacation feeling rejuvenated and re-energized, you’ll find yourself becoming even more anxious as a result of all the work that has to be done.

Should you turn off the tankless water heater when on vacation?

  • When you turn off your tankless water heater while you are away on vacation, you are likely to receive a variety of benefits.
  • Due to the fact that your tankless water heater is subject to some risk exposure, it is recommended that you take measures at all times.
  • There are plumbing issues, the incidence of which is questionable in some cases.
  • For example, some little leaks that may go unnoticed at home may turn out to be explosive when you depart for your vacation since they have accumulated over time.

Only professional plumbers with extensive knowledge can resolve this issue through regular inspections of your water system.

Useful Tips for Turning Off Your Tankless Water Heater

  • In most cases, unless you forget, turning off a tankless water heater in your home is not a difficult task.
  • If you are unable to remember to do it on a regular basis, you will need to write it down in your notebook under the heading ″things to do everyday.″ In the event of a plumbing emergency, you must be aware of where the main water supply valve is located in your home.
  • The other critical step is to ensure that your valve is fully functional before proceeding.
  • Before you depart, you must turn off the water and make sure that the water does not continue to run.

If you have any reason to believe something is wrong, contact your plumber for additional investigation.After determining that your valves are in proper functioning order, you may depart with the knowledge that the only water leakage that might do harm is the one in the lines.When you are away, this is far better to having your flow disrupted while you are away.

Does shutting off a water heater damage it?

In most cases, cutting off the heat source for your tankless water heater will not result in any noticeable consequences. When you are taking a break, it is ideal if you turn off your water heater as well as the main water supply.

See also:  How Often Should You Replace Your Water Filter?


  • Relaxation would be preferable when on vacation, if at all possible.
  • The greatest time to unwind your mind, body, and soul is now.
  • Get adequate sleep and take pleasure in every minute before getting back to your hectic routine in the morning.
  • It is possible to lessen the number of things you have to think about while on vacation by turning off the water heater.

This will enable for you to fully immerse yourself in your vacation experience.

Call Smile HVAC?

If you want assistance with the maintenance or repair of your tankless water heater, you can always rely on Smile HVAC to provide assistance. You can be confident that your water heater is in capable hands because of their extensive experience and knowledge of everything HVAC-related.

How to Operate Tankless Water Heaters

  • It is important to note that a tankless water heater only heats the water you use, as opposed to a traditional water heater, which continuously heats stored water in a tank.
  • Tankless water heaters are available in two configurations: whole-house and point-of-use.
  • A point-of-use water heater simply provides hot water to a single faucet or zone.
  • Gas models are also available for point-of-use models, which are often powered by electricity.

Changing the temperature of the water can be done from the face of the unit on both whole-house and point-of-use models, and some units even include extra capabilities that enable you to temporarily override the water temperature.

Electric Tankless Water Heater

  1. Identify and shut down the circuit breaker that supplies electricity to a small electric tankless water heater. Start by turning on all of the hot water taps that are served by the unit. Opening hot water faucets that are not linked to the water heater is not recommended.
  2. Allow the faucets to run for about 1 or 2 minutes to clear any air that may have accumulated in the lines. Activate the circuit breaker for the tankless water heater and close all of the faucets.
  3. The temperature of the water may be adjusted by turning the temperature dial. Despite the fact that you may have various temperature options to pick from on the dial, the United States Department of Energy recommends adjusting the temperature to 120 degrees Fahrenheit to avoid scorching and to lower your energy bills.
  4. Check that the water shut-off valves attached to the tankless water heater are fully open on both the intake and output water lines. Determination of the hot-water outlet that provides the greatest quantity of hot water Example: If the water heater serves both a washing machine and an entire bathroom, the bathtub faucet should be used because it provides more hot water per minute than a vanity sink or the washing machine does.
  5. Substitute a 5-gallon bucket beneath the bathtub faucet to collect water. Turn on the hot-water faucet completely and hold it there for exactly one minute. The amount of hot water in the bucket should be measured. Slowly close the hot-water outlet shut-off valve and fill the bucket for one minute at a time until the output of water is between 2 and 3 gallons per minute to guarantee that your water is constantly at the right temperature
  6. if necessary, repeat the process.

Gas Tankless Water Heater

  1. To turn off the power to your gas tankless water heater, turn off the circuit breaker that supplies it with electricity. Some versions feature power buttons that allow you to do this function right on the unit itself. Despite the fact that gas warms the water, electricity is required to run the control panel and the ignition system.
  2. Locate the gas shut-off valve that supplies gas to the device and close it. Turn the valve counterclockwise until it is in the ″Off″ position.
  3. Wait 5 minutes to ensure that any gas has been removed from the device. Immediately evacuate the premises and contact your gas provider from a neighbor’s residence if you detect gas after 5 minutes. Please do not make calls from your house. If you do not detect any gas, you should proceed with starting the unit.
  4. Turn the gas shut-off valve counterclockwise to the ″On″ position until the gas is turned back on. To restart the equipment, re-energize the circuit breaker or turn on the power switch.
  5. Temperature control arrows on the tankless water heater control panel may be used to set the temperature to 120 degrees Fahrenheit by pressing on the up or down arrows. To operate your unit from within your house, if your unit includes a wired remote that allows you to control the unit from anywhere in your home, make sure that the remote is turned on before you begin setting the water temperature using the up and down temperature arrows.

Can An Electric Water Heater Explode?

  • Skip to the main content Is It Possible For An Electric Water Heater To Explode?
  • The response is an emphatic YES, without hesitation.
  • Electric water heaters have the potential to explode.
  • That is not to mean that you should be overly concerned.

Installing and maintaining your water heater by a genuine specialist is always the best alternative, as water heaters that are not properly installed and maintained nearly never fail.They are educated on what may and does go wrong with them, as well as how to avoid it in the first place.When water heaters are not properly maintained or installed, they can pose a serious threat.

  1. Observe the following indicators that your water heater may be about to blow up:

Signs That Your Electric Water Heater May Explode

  • Popping, pounding, or banging noises – Does it sound like popcorn is coming out of the heater’s combustion chamber? Over time, particles can accumulate in your water heater, causing obstructions that prevent warm water from rising to the top. It is the water bubbling beneath the accumulation that is making the popping sounds when it exits.
  • Gas leaks are frequently indicated by a sulfurous or rotten egg smell, which should be treated as a life-threatening emergency. If you are able to, switch off the gas and contact a professional as soon as possible. However, if you moved from gas to electricity and discovered that the original gas line had not been properly sealed, it is possible that the problem was caused by the original gas line being improperly capped.
  • It is usually found at the top of the heater and is responsible for releasing pressure as well as water from the tank when the heater leaks. If this valve is leaking, it signals that the pressure within the water tank has risen to an unsafe level, and it may even explode if the pressure continues to rise. If you observe this, you should immediately switch off your water heater.
  • Thermostat connections that are incorrectly connected — An improperly installed water heater is subject to a variety of concerns, including the possibility of an explosion, therefore it’s always best to have a competent specialist install and maintain your water heater.
  • Brown sediment in your water – When sediments build up inside your water tank, they ultimately loosen and flow with the water, creating a brown sediment in your water. This signifies that a sufficient amount of silt has accumulated within to form a blockage, which may result in an explosion.

How to Prevent your Electric Water Heater from Exploding

  • It is possible to take steps to guarantee the proper maintenance of your water heater, which will ultimately improve the overall safety of your property. If you are familiar with the normal functioning parameters of your water heater, you can check on the temperature and pressure valve to see if anything is wrong with it at any time.
  • Reduce the water temperature – It should be set between 120 and 130 degrees Fahrenheit, with typical recommendations of 125 degrees Fahrenheit. Scalding, scorching, or wounded skin, as well as catastrophic damage to your water heater and sewage system, are all possible consequences of exceeding this limit.
  • Make an appointment for a yearly tune-up – Keeping on top of your water heater’s maintenance should always entail having a licensed and dependable professional take care of the job for you. Your expert will be able to cleanse your water heater at the same time that they are checking for problems, which will improve the taste of your water as well as the efficiency of your unit.
  • Allow experts to do the task – As tempting as it may be to complete the work ourselves in order to save money, doing so may result in sloppy or unskilled work. A water heater that has not been properly installed or serviced is more likely to explode. When it comes to repairs, it is usually better to leave them to the pros.

Want a Second Opinion?

If you’re concerned about the condition of your water heater, don’t be. Our crew provides water heater repair and installation services in Manteca, Tracy, Lathrop, and other nearby communities, so you can rest certain that you are in excellent hands.

Further Reading

So, what causes a water heater to blow up? Would it be a good idea to switch off my water heater while I’m away on vacation? Your water heater is making a hissing noise, and you’re not sure what it is. Here’s What You Should Do.

Share This Story, Choose Your Platform!

Page load link

Emergency Water Shut Off

  • Do you have a leaking water pipe?
  • By shutting off the water, you can prevent or reduce water damage.
  • There are various locations where you can switch off the water: A leaking water heater is one option, but so is a leaking plumbing fixture, or the main water line to the home is another.
  • Depending on where your water leak is located, you should follow the steps in this guide accordingly.

We’ve also included an instructional video to lead you through the process for your convenience.

How To Turn The Water Off At The Leaking Water Heater

  1. Shut off the water heater by turning off the gas or electricity supply. The off setting is reached via clockwise rotation of a knob on the top of a gas water heater’s thermostat. The water heater’s thermostat is positioned near the bottom of the appliance.
  2. For electric water heaters, go to your circuit breaker panel and locate the breaker for your water heater
  3. turn it to the off position. For gas water heaters, use the same procedure as above.

Turn off the water supply valve. Turn the lever on the water shutoff valve counterclockwise until the water stops flowing. This valve is normally found on the right side of the cold line, on the top of the water heater, on the hot line.

  1. Drain The Water Heater If Necessary To Avoid Water Damage
  1. Connect a garden hose to the drain faucet, which is situated at the bottom of the water heater, and let it drain.
  2. Extend the hose to a lower area where hot or corrosive water will not cause harm.
  3. Drain the water heater by turning on the drain faucet. As water drains from the home, open a hot water faucet in the house to allow air to circulate into the water heater.

How To Turn The Water Off At The Leaking Plumbing Fixtures

  1. Then, at the leaky plumbing fixture, turn off the water supply by turning the lever on the water supply shut off valve clockwise until it comes to a complete stop. This valve is often found on the flex line or feed pipe that connects to the plumbing fixture in which it is installed. It might be directly behind or directly below the fixture (i.e. toilets, sinks, washing machine). In the case of leaking sinks, turn off the hot and/or cold water pipes as necessary.
  2. Turn off the water supply line if your toilet is leaking or overflowing.
  3. If your washing machine, dishwasher, or refrigerator is leaking, switch off the feed lines first.

Some situations, such as when the supply valve is not easily accessible or when the leak occurs before the shut off valve, will necessitate the shutting off of the main water supply.

How To Turn The Water Off At The Main Water Supply Shut-Off

Several choices are available to you when it comes to cutting off the main water supply. Decide on the choice that best fits your needs and circumstances.

  1. Turn off the main water valve to the home if it is still running. Then, turning the main water valve in a clockwise manner until the water stops flowing, turn it off again. If the main water supply has been turned off, open an outside faucet to allow pressure to be released and excess water to flow out of the system. If the main water supply has been shut off, open an outside faucet to allow pressure to be alleviated and excess water to drain out of the system.
  1. Remove your home’s main water supply from the city, which is normally located underground near the street and may be reached by turning off the water meter box. Access is granted with the use of a street key
  2. alternatively, you may contact your local water department or our helpful staff for assistance.

How To Turn Off The Gas Supply

  • Is there a gas leak in your home?
  • In order to assist you in spotting leaks, the gas provider adds a particular chemical to the natural gas that you are using.
  • As a result, if you smell ″rotten eggs,″ you are most likely experiencing a gas leak.
  • If you are near a gas-powered fixture, check to see that the pilot light is turned on.

You may check for leaks in the lines if the light is on by spraying them with a mild soap solution to pinpoint the area of the leak and turn off the light.The place where the leak is occurring will bubble.When it comes to shutting down the gas supply in order to get the leak repaired, you have a number of alternatives at your disposal.

  1. Decide on the choice that best fits your needs and circumstances.
  2. Cut the gas supply valve counterclockwise to turn off the gas supply.

Electric Hot Water Heater Not Working After Power Outage – Aztilac

  • Power outages are a common occurrence in the United States.
  • Usually, they are not a problem in and of themselves, but they can occasionally carry with them modest to serious issues.
  • One such troublesome circumstance is when an electric hot water heater fails to operate during a power loss.
  • Depending on what has gone wrong with the water heater, it might be anything as little as a faulty thermostat or something as serious as a malfunctioning water heater.

Water Heater Takes Time To Heat Water

  • If you have used up all of your hot water while the power was off, you will need to allow your water heater some time to heat up some more water before continuing.
  • It is not intended to be used as a quick heating device.
  • It takes around half an hour to forty minutes for a gas-powered water heater to heat a tank full of water.
  • A conventional electric heater takes almost twice as long.

Even after this period of time has passed, if there is still no hot water, you should be concerned.

Check The Power Supply

  • Although the electricity has been restored to the interior of the house, it is conceivable that the power supply to the water heater has not been restored yet.
  • There is a possibility that, as a result of the outage, just a portion of the power was restored and not the entire system as a whole.
  • Perhaps your water heater is one of the items that has been impacted.
  • With the use of a ″circuit tester,″ you can determine whether or not your water heater is receiving electricity.

If this is not the case, you must determine why.There are a few of possibilities as to why this is happening.These are the ones: 1.

  1. Tripped Circuit Breaker — When the power was restored, it is possible that the circuit breaker was tripped as a result of a spike in electricity.
  2. In order to correct the situation, you will need to reset the tripped circuit breaker to the ″On″ position.
  3. After that, your water heater should be able to resume regular operation without any more intervention.
  4. However, if the circuit continues to trip, it is preferable to call your local HVAC specialist to come and inspect the situation.

Keep in mind that the circuit only trips when there is an overload.So it’s possible that you’ll need to re-access your electrical and wiring systems.Wires that have been cut or burned — A tiny animal or mouse might have chewed through the wire that connects to the water heater while the power was off.Similarly, the cable might have been accidentally severed or burned as a result of overheating.Whatever the case, the electricity was restored, but the water heater was unable to operate due to the damage to the cables that had been exposed.

In order to repair the wires, you will need to determine where they were eaten or burned and where they were severed.Because of the potentially hazardous nature of this operation, it should be left to your plumber or electrician to complete properly and efficiently.3.Faulty Switchboard — Another possibility is that the problem is with the switchboard, which is where the water heater is powered.

It’s possible that the earthing isn’t done properly, or that the connection is loose.This is something you can verify on your own if you have a basic understanding of electrical principles.In the event that you have any reservations, it is preferable to contact your electrician.Fourth, weak connections in the connector that links the water heater to the power supply source can be caused by a malfunctioning switchboard, just as they can be caused by a bad fuse.

Open the plug and make sure all of the wires are snug.If any wires are hanging loose, reposition them in their proper positions and tighten the screws.Your water heater should be fully operational and ready to meet the hot water demands of your home.When the water heater does not get electricity, it is possible to experience any of the scenarios listed above.

If, on the other hand, the power supply is operational, you must consider a few more factors, including – 1.Thermostat malfunction — It is possible that the water heater’s thermostat failed, and that the power outage was only a convenient cover-up.Attempt to reset the thermostat by first lowering it to zero degrees Fahrenheit.Remove it from the heat for a couple of minutes and get it up to the temperature you like.Hopefully, the problem with your water heater not working after a power loss has been fixed.The odds are that you will have to replace the thermostat itself if this does not solve your problem.

Consult with your local plumber to get it checked out and replaced, if necessary.2.Low/High Voltage — In order for your water heater to work, it requires a specific minimum voltage.The majority of household water heaters work on 220/240 volts, with a few operating on 110/120 volts.As a safety measure, if the voltage is less than the minimum or greater than the maximum, the device will shut down or cease to work as intended.There is a good chance that your water heater is not receiving enough power because there is an issue with your home’s electrical system.

Immediately consult with a reputable and skilled electrician to determine the cause of the problem.When the voltage is restored to normal, your water heater will automatically restart and begin working again.3.Exhausted Heating Components – It is possible that all of the heating elements in your water heater have been extinguished.

Typically, this is a slow and steady process that occurs as your water heater becomes older.You might try replacing the burned components in your water heater to see if it helps to extend its life.To be quite honest, if your water heater is more than a decade old, it is strongly advised that you replace it.4.Tripped Reset Button – Another possibility is that the reset button on your water heater has been tripped accidentally.

This trip might be caused by a defective thermostat, a shorted heating element, or a faulty electrical connection.Until you solve this error, your water heater will not function properly.This reset button is often red in color, and when it trips, it bursts out of the case.

It has to be pushed back into place.

Closing Thoughts

  • A water heater will never be harmed by a power loss on it’s own.
  • When the electricity is restored, a rapid voltage spike, on the other hand, might cause the water heater to fail.
  • However, this will only happen if the circuit breaker does not function properly.
  • As a result, it is critical to ensure that the electrical system in your home is dependable as dependable as possible.

Aside from that, your local plumber or plumbing firm should be able to take care of any water heater difficulties you are experiencing.Never attempt to repair or replace your water heater on your own.It is not a toy that may be used for recreational purposes.

Reasons Why Tankless Water Heater Running Hot and Cold

  • If you have a tankless water heater, you are probably aware that it will occasionally alternate between hot and cold water.
  • This is due to the fact that tankless heaters are intended to operate without any interruptions when heating water.
  • It is not unusual for tankless heaters to be operating at full capacity one second and at half capacity the next.
  • The concern is that this might potentially reduce the efficiency of your tankless water heater, which could result in an increase in your energy bills!

Let’s talk about why your tankless water heater fluctuates in temperature, what causes these variations, and what you can do to avoid them in the future.

Cold Water Sandwich

  • Despite the fact that it is quite unusual, you may encounter a tankless water heater problem known as a cold water sandwich.
  • Your water heater will produce hot water for a few seconds, followed by a blast of cold water (cooler), followed by an abundance of warm water, all at the same time.
  • It almost feels like your tankless water heater shuts off for a split second before starting to heat the water, but this is not the case.
  • This can occur when a fixture is utilized shortly after another fixture has been turned off, as is the case in this example.

Prior to the gas burner being able to fully heat the heat exchanger, you’ll receive some hot water held by the faucet, followed by cold water from the tankless water heater.If you’re washing your hands, a cold water sandwich isn’t likely to be a major inconvenience.However, it might be inconvenient if you’re taking a chilly shower when you’d prefer hot water.

  1. Here’s how to get rid of that bothersome temperature variation in your water supply.

How to Fix It

  • When it comes to repairing a cold water sandwich, you have two options: building a recirculating system or installing a small tank water heater.
  • In fact, several manufacturers are already offering this buffer tank as an option today.
  • Add a recirculating system–also known as a return loop–to your tankless unit if you don’t want a large amount of hot water all at once.
  • This will eliminate the heat exchanger delay.

It’s vital to remember, however, that more energy is spent throughout the procedure.Do you have more substantial hot water requirements?By adding a small tank water heater to your tankless water heater, you may enhance its capacity and avoid the burst of cold water that occurs during use.

  1. The return loop is connected to the water heater by this connection.
  2. Because it just has a five-gallon storage tank, it is extremely energy efficient in operation.
  3. Never forget that a tankless water heater has an almost limitless capacity if it is installed and maintained properly.

Wrong Gas Line Size

The majority of tankless water heaters require you to (size) expand your gas line in order to ensure an adequate supply of gas. It’s possible that you’ve previously done this and your water is still flowing hot and cold. If so, your line is the incorrect size. It may be necessary to upgrade your gas meter in order to guarantee that your water heater receives enough fuel.

How to Fix It

The diameter of the line used for a tankless water heater should be between 1/2″ and 3/4 inch in diameter. For gas line replacement, contact a Service Experts Heating & Air Conditioning Expert if yours is too tiny.

Improper Plumbing System Crossover

  • Tankless water heaters require a direct connection to the supply and return lines in order to function properly.
  • It is possible for cold water to infiltrate into the hot water line when the plumbing was done incorrectly or when a pressure balancing shower valve has to be repaired.
  • This results in the hot water becoming tepid.
  • The hot and cold water will come in bursts until the line heats up after a period of consistent use.

It might be tough to diagnose this problem on your own, without the assistance of a trained professional plumber.

How to Fix It

  • When it comes to repairing a plumbing system crossover that isn’t working properly, you have two alternatives.
  • You have two options for adjusting the temperature of your tankless water heater: increase the thermostat or add a pressure balancing valve.
  • If you choose to raise the thermostat, you will be forced to utilize hot water from every faucet on a continuous basis.
  • Slowly raising the temperature of your hot water supply will allow it to heat up in your return line, which will benefit you.

If you elect to place a pressure-balancing valve in your gas line, the valve will keep track of the temperature of the incoming gas line to your home.It will also balance out any extra pressure that occurs when cold water enters the system, preventing you from experiencing bursts of hot and cold water at the same time.

Broken Flow Sensor

  • A faulty flow sensor might cause your tankless water heater to alternate between hot and cold operation.
  • The flow sensor monitors the amount of water entering your system and transmits that information to the control board of your unit.
  • If there is a sudden rush of cold that enters the system, the controller adjusts the flame accordingly.
  • This guarantees that you have enough hot water for everyone in your household straight away.

How to Fix It

It is necessary to determine the cause of the injury. Gas pressure, thermostat, and the water heater component of your system should all be checked for problems. Service Experts Heating & Air Conditioning can repair your tankless water heater’s flow sensor if it becomes faulty. This will ensure that your tankless water heater operates properly.

Dirty Water Filter

  • The water filter installed on the cold water input of instantaneous (tankless) water heaters extends the life of the heater and helps it to operate more efficiently by catching (sediments), calcium, lime, and iron in the water.
  • If it becomes too soiled, you may not only experience unexpected spurts of cold and warm water, but your natural gas cost may also spike as a result.
  • If there is an excessive amount of mineral building in your tankless heater, you may need to descale it.

How to Fix It

Replace your system’s filter on a regular basis to ensure that it is operating at peak performance. We recommend that you do this approximately every six months or so.

Corroded Lines

  • Corroded water lines (in your home)

Leave a Reply

Your email address will not be published.