How To Replace A Thermocouple On A Hot Water Heater

How to Replace a Water Heater Thermocouple

Time Approximately one hour or less Complexity Cost for a beginner is less than $20.

Introduction

A thermocouple replacement may be all that is required for a hot water heater that is not heating. Learn how to replace this low-cost component and ensure that your hot water heater continues to function for many years.

Tools Required

Remove the burner assembly and the thermocouple from the assembly. Wear and tear on the thermocouple is the most common reason for pilot lights that won’t remain lit for long periods of time. It’s simple to change, and a new one will cost you between $5 and $10. The entire burner and thermocouple assembly may be removed rather than attempting to unfasten the thermocouple from within the water heater’s burning chamber, which is less time-consuming. Then remove the thermocouple from the burner and bring it with you to a home center or hardware store so that you can make sure you get the correct replacement.

Disconnect the three bolts that connect the thermocouple and the two gas tubes to the valve and set them aside.

Repairing Your Own Hot Water Heater

Sign Up For Our Newsletter

Complete your do-it-yourself tasks like an expert! Become a subscriber to our newsletter! Do It Right the First Time, and Do It Yourself! Step number three.

Vacuum

Cleaning the burner chamber, checking for water leaks, and removing dirt from the burner ports are all smart ideas at this time of year. Reattach the thermocouple and replace the burner component once it has been disconnected. Follow the manufacturer’s directions for lighting the pilot on the water heater. While the main burner is running, check for gas leaks by pouring soapy water to joints and searching for bubbles to indicate a leak. Instructions on How to Install a Hot Water Heater

No Hot Water? Restore It Yourself

Your gas water heater’s burner chamber has what’s known as a thermocouple, which is a little metal cylinder that sits directly in front of the pilot light. The thermocouple is a safety device that detects when the pilot light is on and has to be replaced. If the pilot light goes out, the thermocouple sends a signal to the gas valve, which keeps the valve closed until the pilot light returns.

A worn out thermocouple is one of the most common gas water heater problems

Thermalcouples wear down over time, causing the pilot light to go out, the burner to not fire, and the lack of hot water to result. First, try re-igniting the pilot by following the instructions on the tank’s side panel. It is possible that the thermocouple is defective if the pilot ignites but the flame goes out as soon as you release the button after holding it for 60 seconds. It is feasible to change the thermocouple without having to disassemble the burner assembly, and many repair technicians do so.

Even though this work is straightforward, you should not do it unless you are familiar with how to turn off the gas to the water heater and are confident in your ability to relight the pilot.

A wide variety of thermocouples for water heaters may be found at most hardware stores and home improvement centers.

Then purchase a replacement in the same size. The thermocouple may be installed in practically any water heater with the provided parts. If your water heater does not appear to be the same as the one seen, contact a repair service. Thermocouple for a hot water boiler Lowe’s and Home Depot

Fix Your Water Heater with an Easy Thermocouple Replacement

A thermocouple, also known as a flame sensor, is a device that controls the flow of gas in gas water heaters. While the device is often known as athermocouple on older heaters with standing pilot lights, it is known as an aflame sensor on contemporary heaters with electronic ignition. The mechanism is essentially the same (or nearly the same) on both types of heaters. Both devices will be referred to as thethermocouple for the sake of this article. An external gas control valve is connected to a thermocouple as part of the pilot burner assembly, which is located on each side of the water heater.

It is made of a single piece of metal.

As a result, it is an extremely important safety component of your water heater system.

Thermocouple or Flame Sensor?

The method by which you replace the thermocouple will be determined by the type of ignition system installed in your water heater. The thermocouple is a component of the burner assembly in both forms of ignition, whether it is a standing pilot or electronic. Standing pilots have only a pilot and thermocouple linked to the burner assembly, while a running pilot does not. The pilot and thermocouple are both used in conjunction with an electronic ignition system. An electronic igniter is also coupled to the burner assembly in an electronic ignition system.

Before You Begin

When servicing an electronic ignition water heater or a standing-pilot water heater, the first step is to disconnect the connections to the gas control valve and then reconnect them. Turn the gas control valve on the water heater to the “OFF” position to turn the water heater off. The shutdown valve for the gas supply pipe to the water heater should be closed.

Warning

It is better to leave any work on water heaters and other gas appliances to the pros. Never undertake this job unless you have considerable experience dealing with gas appliances and all of the abilities required to perform it safely and correctly. Home-Cost.com

Materials

  • Water heaters and other gas equipment should only be serviced by qualified technicians. Do not try this job unless you have significant experience dealing with gas appliances and possess all of the essential abilities to accomplish the operation safely and correctly. Home-Cost.com

How to Replace the Thermocouple on an Electronic Ignition Water Heater

  • The combustion chamber of water heaters that use electronic ignition is completely sealed and gasketed to prevent leakage. Removal of the burner assembly manifold cover is required to get access to the combustion chamber, which contains the burner supply tube, burner, electronic ignition, pilot and thermocouple. The burner assembly manifold cover must be removed to gain access to the combustion chamber. Removing the bolts that hold the burner assembly manifold cover plate in place is a good idea. Depending on the type and model of water heater you have, the panel may be secured with nuts, screws, or tamper-resistant fasteners such as 20 Torx-head screws, which are available in various sizes. Home-Cost.com

Remove the Burner Assembly

  • Take hold of the burner supply tube and gently press it down to release the connections to the manifold, pilot tube, and thermocouple. Remove the manifold/burner assembly from the burner combustion compartment by gently pulling it out. Take care not to do any harm to the interior components of the vehicle. If the burner does not move easily, look around the base to see if there are any more screws keeping it in place there. Home-Cost.com

Remove the Cover Plate Gasket

  • Take care not to damage the old gasket by removing it from around the manifold cover plate if it is still in excellent shape and you intend to reuse it. If this is the case, remove the gasket and arrange to purchase a new one. Clean the metal surfaces that are in contact with the water heater’s cover plate.

Remove the Thermocouple

Pulling and twisting the old thermocouple from its mounting bracket should be done slowly and firmly. If you apply hard pressure to it, it should come out easily. Make certain that the connection between the pilot and the thermocouple bracket does not get bent or deformed. Remove the old thermocouple entirely by drawing it through the rubber grommet seal on the inside of the burner assembly manifold cover or through the gap in the burner assembly manifold cover from inside to outside. If necessary, you can cut the old thermocouple to make it easier to remove.

Tip

  • Take the old thermocouple to a hardware, home improvement, or plumbing supply store and purchase a replacement that is identical in size and shape. If you are replacing the old gasket on the manifold cover plate, you need also purchase a new one.

Install a New Thermocouple

  • Insert the new thermocouple into the burner assembly manifold cover through the grommet or aperture on the exterior of the manifold cover. Completely seat or click the thermocouple into its mounting bracket until it is securely in place. The thermocouple tip should be positioned so that the pilot flame encircles the top 3/8 to 1/2 inch of the thermocouple tip. Home-Cost.com

Reinstall the Burner Unit

  1. If necessary, replace the gasket on the burner manifold lid or reinstall the original one if it is still in excellent shape. Place the burner in the combustion chamber and tighten the unit down to the right setting. Replace the cover assembly in its original location. Make sure that you do not overtighten the screws or fasteners. Finally, reattach the gas control valve (as shown in the illustration below).

How to Replace the Thermocouple on a Standing-Pilot Water Heater

  • Simply lift and remove the burner assembly from the bottom of the water heater once the pilot supply tube, burner supply tube, and thermocouple have been detached from the gas control valve (as described above).

Remove the Thermocouple

  • Pulling and twisting the old thermocouple away from the thermocouple bracket should be done slowly and firmly. If you apply hard pressure to it, it should come out easily. Take care not to bend or damage any of the components.

Install a New Thermocouple

  • Insert the replacement thermocouple into the bracket from which it was previously removed until it is fully seated or snaps into place (see illustration). The thermocouple tip should be positioned so that the pilot flame encircles the top 3/8 to 1/2 inch of the thermocouple tip.

Reinstall the Burner Unit

  1. Reinstall the burner in the combustion chamber and reinstall the unit in the right position. Reconnect the gas control valve (as seen in the illustration below)

How to Reconnect the Gas Control Valve

In order to ensure correct seating of the unit, the burner must be reinserted into the combustion chamber.

The gas control valve should be reconnected (see instructions below).

Reattach the Gas Tubes

  • The gas control valve must be reconnected to the burner supply tube, pilot supply tube, and thermocouple once they have been disconnected. The thermocouple’s mounting nut should be no more than 1/4 turn tighter than it is when it is hand-tight. Ensure that the Piezo igniter is properly connected on electronic-ignition equipment.

Turn On the Gas

  • Turn off the gas supply by opening the shutdown valve on the pipe. Make sure that the gas control valve is in the “ON” position. When using a standing-pilot device, be sure to relight the pilot by following the manufacturer’s instructions before turning on the valve. Temperature of the water heater should be set to the required temperature.

Test the Water Heater

  1. Shut off the gas supply pipe by opening the shutdown valve. The gas control valve should be turned to the “ON” setting. Prior to turning on the valve in a standing-pilot unit, make sure the pilot is re-lit according to the manufacturer’s directions. To get the required temperature, adjust the water heater’s thermostat.

How To Replace A Water Heater Thermocouple

Please keep in mind that this content may contain affiliate links. This means that, at no additional cost to you, we may gain a small profit on purchases made via our links. If the pilot light will not stay lit while there is gas flow, it is likely that the thermocouple has to be changed or, at the absolute least, cleaned. A universal thermocouple is a low-cost component that can be found at most major hardware stores. It is less difficult than you would imagine to replace a thermocouple.

How Does a Thermocouple Work?

There may be affiliate links in this content, so please be aware of that. This means that, at no additional cost to you, we may gain a small fee on purchases made via our links and advertisements. It’s likely that the thermocouple has to be changed or cleaned if the pilot light won’t stay lit while there is gas flow in the system. A universal thermocouple is a low-cost component that can be found at most major hardware stores. It’s less difficult than you would think to replace a thermocouple!

Before you Replace the Thermocouple

Before installing a new thermocouple, make sure there are no blockages in the supply line. Symptoms similar to those caused by a failing thermocouple might also be caused by an obstruction in the thermocouple or pilot tubes. If you blow through the tube and there is no air movement, the tube is most likely blocked with debris. To remove junk from a line, insert a piece of wire all the way through the tube and then use air pressure to clear out any dust or rubbish that has accumulated along the route.

Replacing the Thermocouple

You should turn off the gas line that leads to your water heater. Most units will have an inline valve for the gas input, but if one is not accessible, you can switch off the main gas line by turning it off. To turn off the gas, turn the gas control valve to the OFF position.

Step 2

Remove the thermocouple line, the gas line, and the line for the pilot light with open-faced wrenches or an adjustable wrench, and then replace them. The thermocouple is typically threaded on the left side, whereas the main gas line is threaded on the right side. According to the manufacturer, the pilot light tube is often a right-hand thread, although it might be either one, depending on the kind of water heater that needs repair.

See also:  How Long Does It Take A Water Heater To Heat Up For The First Time

Step 3

Some versions, particularly those with a push button pilot igniter, have a protective cover over the burner chamber that must be removed before the burner may be used. If there is a cover, remove that as well.

Step 4

The burner, which is equipped with a pilot light and thermocouple tubing, is placed loosely in the container. Depending on whether the burner component is difficult to remove, there may be clips that must be loosened before the burner will move. Remove the complete burner component from the water heater by sliding it out.

Step 5

Take the thermocouple out of the burner and set it aside. In the vast majority of situations, no special instruments are necessary.

Connecting the thermocouple to the pilot tube is made possible via the use of clips that keep it in the proper place. It may be necessary to detach the clips to ensure that the thermocouple can be readily removed from the pilot assembly.

Step 6

Installing a new thermocouple is as simple as reversing the previous procedures. Keep in mind that one or more of the fittings has a left-hand thread and must be installed by turning the fittings counterclockwise. Make sure not to cross the threads and tighten all three fittings to the maximum degree possible.

Step 7

Turn on the gas valve that leads to the water heater. To relight the pilot, follow the directions printed on the pilot and turn the temperature control valve to the appropriate temperature setting. Apply soapy water around the three fittings, keeping an eye out for bubbles that signal a possible gas leak. Please see the following video for instructions on how to replace your thermocouple.

How to Replace a Water Heater Thermocouple (6 Simple Steps)

When using a gas-powered tank water heater, have you ever found that the pilot light won’t remain lit for long periods of time? We’re here to provide assistance before you head out the door to seek for a new water heater. It’s possible that a defective thermocouple is the blame. The replacement of a water heater thermocouple is a simple task if you have the correct expertise. It may be sufficient to simply wipe the thermocouple in some circumstances.

What Is a Water Heater Thermocouple?

A thermocouple is responsible for regulating gas flow in an agas-powered water heater. Flame sensors are another name for this feature, which is usually found in modern water heaters. The thermocouple is a component of the pilot burner. It measures temperature. It communicates with the gas control valve, which is located on the unit’s outside. The heat from a flame is converted into little electrical currents, which is the essence of what it does. This enables the thermocouple to function in a manner similar to a switch, regulating the flow of gas through the gas valve.

The gas feed to the burner will be stopped if it does not detect a flame.

For starters, there is a little probe that is approximately one inch long and 14 inches in diameter that is placed right above the pilot opening.

The second component is a copper tube.

Thermoelectric Effect

Typically, the flow of gas in an agas-powered water heater is controlled by a thermocouple. However, it is primarily found in modern water heaters under the name of flame sensor. Among the components of the pilot burner is a thermocouple. It communicates with the gas control valve, which is located on the unit’s outside. The heat from a flame is converted into tiny electrical currents, which is the basic function of this device. This enables the thermocouple to function in a similar manner as a switch, regulating the flow of gas from a gas valve.

The gas feed to the burner will be interrupted if it does not detect a flame.

It consists of two parts: a tiny probe that is approximately one inch long and 14 inches in diameter that is placed directly above the pilot hole.

The probe gets heated by the flame whenever the pilot light is turned on. A copper tube serves as the other component. By use of a little nut, this is attached to either the front or side of the gas valve.

Electronic Ignition vs Standing Pilot

In terms of ignition methods, there are two primary options: standing pilot and electronic ignition. The method by which you should replace the thermocouple is determined on the sort of system in your device. For a standing pilot system, the only components are the pilot and thermocouple, which are both attached to the burner assembly. Electronic ignitions feature the same components as mechanical ignitions, but they additionally have an electronic igniter. Checking for a pilot flame is a simple method to determine if you have a standing or electronic system in place.

Electronic ignition devices rely on a thermostat to determine when the burner should be turned on and when it should not.

How Do You Know If You Have a Bad Thermocouple?

Standing pilot and electronic ignition are the two most common types of ignition systems. Your unit’s kind of setup will determine how you should go about replacing the thermocouple. For a standing pilot system, the only components are the pilot and thermocouple, which are both connected to the burner assembly by means of a connector. In addition to the same components as mechanical ignitions, electronic ignitions feature an electronic igniter. Checking for a pilot flame is a simple method to determine if you have a standing or electronic system installed.

The thermostat is used to determine when the burner should be turned on in electronic ignition equipment.

How to Test the Thermocouple

When in doubt about whether or not you need to replace the thermocouple, we recommend that you test it. Because the thermocouple generates only modest electrical currents, you may check to see if it is working with a multimeter. Start by removing the thermocouple from the gas valve and then starting the pilot – you may need a friend to hold the gas control knob in place while you do this. Select millivolts on your multimeter’s display and wait approximately a minute until the probe becomes heated.

A properly functioning thermocouple will typically produce a reading between 25 and 35 millivolts in most cases (2).

How to Replace a Water Heater Thermocouple

To find out whether you need to replace the thermocouple, we recommend that you do a test on the component. A multimeter may be used to check whether or not the thermocouple is working because it generates only modest electrical currents. First, remove the thermocouple from the gas valve and start the pilot. You may need a helper to keep the gas control knob in place while you do this. Select millivolts as the measurement unit on your multimeter and wait around one minute until the probe is heated.

Most thermocouples will give a reading between 25 and 35 millivolts if they are in good operating order (2). The thermocouple, on the other hand, has malfunctioned and must be replaced if the result is less than 25 millivolts.

1.Removing the Cover Panel

When in doubt about whether or not you should replace the thermocouple, we recommend that you test it. Because the thermocouple generates only modest electrical currents, you may check to see if it works with a multimeter. First, remove the thermocouple from the gas valve and start the pilot. You may need a companion to hold the gas control knob in place while you do this. Select millivolts on your multimeter’s display and wait approximately a minute until the probe is heated. When you’re certain it’s hot, connect one lead to the thermocouple shaft and the other lead to the thermocouple connection.

If, on the other hand, you receive a reading of 25 millivolts or less, the thermocouple has failed and must be replaced.

2.Disconnect the Control Valve

To disconnect the thermocouple connection from the control valve, use an open-end or adjustable wrench to pry it apart. In addition, you must disconnect the pilot supply line as well as the main burner supply tube. If you have an electronic ignition, you will also need to remove the wire that connects to the Piezo igniter.

3.Removing the Thermocouple

The malfunctioning thermocouple should be removed from the mounting bracket that it is attached to as soon as the burner assembly is removed from the burner assembly. Take cautious not to harm any of the components. Remove the thermocouple from an electronic ignition system by pulling it through the grommet seal. This will ensure that it is entirely removed.

4.Install the New Thermocouple

Your replacement thermocouple should be installed at this point. If you have a different kind from the one described above, take a closer look at what you have: In the case of Electronic Ignition Systems Insert the new thermocouple through the grommet seal and the aperture in the assembly manifold cover. Replace the old thermocouple. It is necessary to attach the thermocouple within the mounting bracket for both electronic ignition and standing pilot systems. Gently push it into place until it is completely in place or until it clicks, indicating that it is in place.

The burner assembly must be replaced in the burner combustion chamber once it has been removed.

A gasket around the top plate of the manifold is also required when using an electronic ignition system.

If it appears to be damaged or old, it should be replaced with a new one.

5.Reconnect Gas Control

To begin, connect the pilot and burner supply tubes, as well as the thermocouple, to the gas control valve using the appropriate connectors. Make sure the thermocouple is only a quarter turn tighter than it would be by holding it in your hand. If you have an electronic ignition, you will also need to reconnect the Piezo igniter at this time.

After that, open the gas shut-off valve and turn the gas control valve to the “ON” position. Using a standing pilot system, you will need to light the pilot before turning on the gas control valve to ensure that the pilot is lit. The thermostat should be set to the appropriate temperature.

6.Check for Gas Leakage

When dealing with a gas-powered water heater, it’s critical to ensure that there are no leaks in the system. The most effective method of checking is to use a water and soap combination. Cover all of the fittings with the soapy mixture, making sure there are no air bubbles present. If you do find bubbles coming from the leak, double-check and tighten all of the fittings. Check again and again until you’re certain there isn’t a leak.

How Much Is a Thermocouple for a Water Heater?

A thermocouple is a small but critical component of a gas-powered water heater. It is relatively affordable. An experienced plumber can complete the service for you for up to $150 in most cases. If, on the other hand, you opt to follow our instructions and repair it yourself, you’ll just have to pay for the thermocouple replacement, which is typically approximately $20. It is possible to purchase them at your local hardware store, plumbing supply store, or home improvement store. We strongly advise you to bring your old thermocouple to the shop for repair.

Keep It Lit

If you’re having difficulties keeping the pilot light lit or even getting it to light, it’s possible that you have a blockage that may be readily cleared. If this is not the case, it is possible that the thermocouple has to be replaced. Have you ever attempted to repair a thermocouple that was no longer working? Please share your suggestions or thoughts in the section below – we look forward to hearing from you.

How to Replace a Hot Water Heater Thermocouple

The most recent update was made on September 28th, 2021. In a natural gas hot water heater, a thermocouple is a component that regulates the flow of natural gas into the water heater itself. It is attached to the gas control valve, which is placed on the outside of your water heater tank, and its duty is to convert the heat from the pilot flame into an electrical current to power the water heater. When the thermocouple does not detect a flame, it shuts down the gas valve, preventing any gas from being sent to the burner at all.

Unfortunately, problems with the thermocouple in your hot water heater may be the cause of your pilot light not lighting or your burner not keeping lit.

Most thermocouples are interchangeable, but if you’re not sure, detach the present thermocouple and take it to the hardware shop to make sure you’re obtaining the correct part for your application.

  1. Turn off the gas supply to the house. To begin with, make sure that the gas control knob is in the “OFF” position before beginning any repairs. Remove the cover off the exterior of your hot water heater and set it aside for now. It is necessary to remove any covers that may be covering the burner chamber. Make use of an adjustable wrench to remove the pilot tube and thermocouple line from the burner assembly. Remove the burner component from the water heater’s internal combustion chamber. It’s possible that there are clamps holding the old thermocouple to the pilot gas supply tube that you’ll need to loosen before you can proceed. The thermocouple should be installed in the same manner that the previous one was removed: by putting the probe into the fitting and the other end into the pilot gas supply, for example. reinstall the burner assembly into the and use the wrench to reattach the burner, pilot, and thermocouple tubes to their respective sockets. Return all of the coverings that you have removed to their original positions. Make sure there are no leaks in the gas pipes by turning on the gas valve. If there is any bubbling, apply soapy water to the connection and check again. Stopping the leak as soon as you see it and contacting a professional water heater expert for assistance are the first steps to take.
See also:  What Is The Black Stuff In My Water Filter

Not confident in your ability to replace your thermocouple on your own?

Evam Canada’s highly trained hot water heater specialists are available to assist you with the repair and maintenance of your equipment. Call 1-905-624-5544 or send us an email to book an appointment for your repair.

Post navigation

It is most often a malfunctioning thermocouple that causes the pilot light on a gas water heater to fail to stay lit when the water is turned on. If you have a pilot light turned on, the thermocouple delivers an electrical signal to the gas valve, which allows the pilot valve to remain open. It also instructs the valve to shut when the pilot is turned off in order to prevent unburned gas from leaking out into the atmosphere. Fortunately, changing the thermocouple, which is located close to the pilot, is a straightforward task.

  1. Turn the red gas control knob to the “Off” position and close the gas-supply valve to turn off the gas supply. When the handle is aligned perpendicular to the gas line, the supply valve is closed. Remove the cover from the outside of the heater in order to see the burner chamber within. In addition, if your water heater has a second cover, remove that as well. Remove the pilot tube and thermocouple lead from the burner assembly by removing them with a 7/16-inch wrench from the burner assembly. It is common for the pilot connection to be on one side of the red control knob and the thermocouple lead to be on the other side. Using a 3/4-inch wrench, remove the burner supply tubing from the burner. It should be located precisely beneath the knob. Remove the burner assembly by pulling it out. Remove the thermocouple tube from the fitting that keeps it close to the pilot tube and remove the probe out of the fitting that holds it adjacent to the pilot tube. The probe of a new thermocouple should be inserted into the fitting and adjusted such that it sits 1/8 to 1/4 inch past the pilot tube. Snap the hose onto the burner assembly, and then push the burner assembly back into its original position beneath the heating element. Reattach the burner, pilot, and thermocouple tubes
  2. Turn on the gas valve and check for leaks by squeezing a little amount of dish soap over the connections for the burner and pilot
  3. Turn off the gas valve and remove the thermocouple tubes. If you detect bubbles, you should tighten the connections. When you are certain that the connections are not leaking, light the pilot.

How to Clean Thermocouple on Water Heater? (Updated February 2022)

To turn off the gas supply valve, turn the red gas control knob all the way to the “Off” position. When the handle is aligned perpendicular to the gas line, the supply valve is turned off. Remove the cover from the outside of the heater in order to reveal the burner chamber. In addition, if your water heater has a second cover, remove it. Make use of a 7/16-inch wrench to unscrew the pilot tube and thermocouple lead from the burner assembly. It is customary for the pilot connection to be on one side of the red control knob and the thermocouple lead to be on the other.

  • If possible, it should be located immediately beneath the knob.
  • The thermocouple tube should be removed from the pilot tube by pulling it out of the fitting that keeps it there.
  • Snap the hose onto the burner assembly, and then push the burner assembly back into its original position beneath the heat source.
  • If you detect bubbles, tighten the connections.

How to Check if You Have a Dirty Thermocouple?

A clogged thermocouple will be unable to detect either the build-up or the loss of heat energy. Alternatively, it is possible that the thermocouple will not be able to provide accurate results. The gas supply to the furnace will be cut off even if the pilot light is illuminated by the device. Alternatively, it is possible that the pilot light is not functioning properly. In this particular instance, soot has accumulated on the thermocouple.

How to Clean Thermocouple on Water Heater?

Check to see that the power has been turned off before cleaning the thermocouple. This will prevent you from being electrocuted when cleaning the thermocouple. It is possible that the thermocouple’s ends have become rusted. It is possible that the pilot lights will not get electricity because of this. Use an emery cloth sandpaper to smooth off the edges of this piece. The sandpaper will be linked to a piece of cloth, which will make it easier and more flexible to rub on small portions of the surface.

Now, using a soft cloth, wipe the item clean.

After that, switch on the water heater and re-ignite the pilot light, if necessary.

While doing this step, a flashlight should be used. If the water begins to heat up, this indicates that the cleaning procedure was successful. If this is not the case, a new thermocouple must be purchased and installed.

How to Replace the Thermocouple?

Temperature sensors often survive several years, but they do not live any longer than the furnace it is attached to. It is thus necessary to replace the thermocouple if you notice that the pilot light is on but that the main furnace is not showing it. You may take your thermocouple to a hardware store if it isn’t operating properly. It is available in a variety of sizes, therefore you must match the size of the new thermocouple to the size of the existing thermocouple. If you are still unable to determine which thermocouple should be used, you should consult with the salesman for assistance.

Pull the bolts out of the way and push the thermocouple through the metal bracket that surrounds it to complete the installation.

Last updated on February 10, 2022 / Affiliate links included / Images sourced from the Amazon Product Advertising API

What is the Cost of the Replacement of Thermocouple?

Temperature-couple replacement is an expensive endeavor that is subject to fluctuation in price. The cost of hiring a professional plumber will be approximately $150 in most cases. If you install it yourself, the thermocouple will cost you around $20, which is the cost of the thermocouple itself.

Why Won’t my Pilot Light stay Lit on my Fireplace?

If your pilot light comes on but does not remain lighted for an extended period of time, there is an issue with the thermocouple. In this instance, it is necessary to replace the thermocouple. If this does not resolve the issue, the valve as a whole will need to be replaced. There is one thing that you can do on your own: educate yourself. On the valve, you may notice a little screw that adjusts the size of the pilot flame. This is normal. When the pilot flame is too low, it is necessary to do this procedure.

Are all Thermocouples the Same?

No. Thermocouples are distinct from one another. Its durability, temperature range, resistance to vibration, and application suitability are all unmatched by any other material. Type J, K, T, and E thermocouples are referred to as ‘Base Metal’ thermocouples. These are the most often encountered. The thermocouples of type R, S, and B are known as ‘Nobel Metal’ thermocouples. These are utilized in applications that need high temperatures. When choosing thermocouples, consider their cost, high-temperature limitations, wide temperature range, and long-term durability.

What is the Difference Between Thermocouple and Thermopile?

No. Thermocouples differ from one another in their characteristics. Its durability, temperature range, resilience to vibration, and application suitability are all unmatched, as are its other qualities. Base Metal thermocouples are classified as Type J, K, T, and E. Most people will recognize these. Nobel Metal thermocouples are classified as Type R, S, and B. The usage of these in high-temperature applications has become common practice.

When choosing thermocouples, consider their cost, high-temperature restrictions, wide temperature range, and long-term dependability. Affiliation links and images from the Amazon Product Advertising API were used in this post. Last updated on February 10, 2022.

Why Water Heater Pilot Light Won’t Stay Lit After Replacing Thermocouple?

This is not an uncommon problem that the majority of people will never be able to comprehend. Because the thermocouple is directly responsible for turning on the pilot light, it is quite probable that it will remain on for an extended period of time. However, if you are experiencing such difficulties, there are primarily two possible explanations. The first one, despite its poor electrical output, is the most important. Even if you have a new thermocouple fitted, it is possible that it will only emit a faint flame, which will explain why the pilot light is not blowing.

The other explanation is that the vent pipe is clogged.

If there is no weather cap on the vent, the wind may easily travel through it and fully blow it out if there is none on it.

Consequently, you must be explicit about the weather, followed by the burner holes.

How To Replace Thermocouple?

Replacement of a thermocouple is accomplished in a somewhat different manner in the case of electric ignition and gas-based ignition, respectively. You can proceed with any technique that corresponds to your preferred method of ignition. In the case of Electric Ignition

  1. The first step is to disconnect the gas control hub from the mains power. There is a little valve in place that is in charge of the gas supply at this location. It is essential that you switch it off before using it
  2. Once you have finished, you will be prompted to remove the assembly cover from the unit. This is located immediately outside of the combustion chamber to ensure the safety of the system. You must progressively remove the cover plate
  3. After you have gained access to the combustion chamber, you must remove the burner tube from the combustion chamber. This may be accomplished with the use of a range and a few screwdrivers
  4. The next step is to remove the front cover plate. There is an old gasket that serves as an additional layer of protection for the thermocouple. Remove the gasket, and then clean the surface with a mild detergent. It is quite simple to remove the thermocouple and replace it with a new one after the area is entirely clean for your use. Before you begin, take a picture of the setup to help you remember it later. When you are finished with the thermocouple replacement, reverse the procedure to finish the installation. It’s important to remember to tighten every screw you encounter.

In order to begin, the gas control hub must be turned off. In the vicinity of the gas supply is a little valve that is in charge of it. Make care to switch it off before using it; once you’re finished, you’ll need to remove the assembly cover to finish the job. For safety reasons, this is located slightly outside of the combustion chamber. You must carefully remove the cover plate; after you have gained access to the combustion chamber, you must remove the burner tube from the combustion chamber.

As an added layer of protection for the thermocouple, there is an old gasket in the way.

It is quite simple to remove the thermocouple and replace it with a new one after the area is entirely clean for your usage.

When you are finished with the thermocouple replacement, reverse the method to finish the installation.

  1. Follow the steps through to the end, where you will find the burner assembly. Once you’ve arrived, you’ll need to carefully remove the component from the lower section of the heater
  2. You’ll now be able to see where the thermocouple is located. To remove this device from this location, you must twist and pull it out. You may now replace it with a new thermocouple and reinstall the unit
  3. Once you have finished reinstalling the unit, you can return the burner unit to its original position on the burner assembly. Make certain that all of the gas valves are correctly connected in order for it to ignite properly.

How to Replace Thermocouple On A Gas Water Heater?

To get to the burner assembly, follow the steps in the method from beginning to end. Following your arrival, you will need to carefully remove the heater assembly from its lower section, where you will be able to examine the thermocouple. To remove this gadget from this location, you must twist and pull it.

You may now replace it with a new thermocouple and reinstall the unit; once you have finished reinstalling the unit, you can return the burner unit to its original position on the burner unit. In order for it to ignite correctly, make certain that all of the gas valves are fully operational.

  1. Locate the thermocouple, which should be located on the rear of the heater. Because the thermocouple is located on the outside of the tank, you won’t have to open the tank to locate it. Identifying the joints and disconnecting them are also important steps. Make use of a sharp cutter to cut away the thermocouple connectivity that is now there. What you’ll need to do next is swap out the existing thermocouple for a new one. Make certain that it is connected to the valve in the right manner. Seal it from both ends if at all feasible to prevent leakage. It is necessary to reinstall the burner as a last step in the procedure. It is necessary to correctly tighten the nuts. To check on the heater’s operational status, you may now switch on the burner.
See also:  How To Turn Off Tankless Water Heater

How to Replace the Thermocouple on a Whirlpool Water Heater

Home-Diy When your Whirlpool water heater fails to heat the water in the tank, the most likely cause is a faulty thermocouple, which may be replaced. The pilot light warms the thermocouple, which provides electric current that instructs the gas control valve/thermostat to continue to flow gas to the burner assembly as long as the pilot light is lit. if (sources.length) then this.parentNode.removeChild(sources); else this.onerror = null; this.src = fallback; if (sources.length) then this.parentNode.removeChild(sources); else if (sources.length) then this.parentNode.removeChild(sources); else if (sources.length) then this.parentNode.remove ‘/public/images/logo-fallback.png’) is a fallback logo image.

The pilot light warms the thermocouple, which provides electric current that instructs the gas control valve/thermostat to continue to flow gas to the burner assembly as long as the pilot light is lit.

  1. Cut the manual shut-off valve that delivers the gas to the control valve/thermostat in the clockwise direction to turn off the gas supply. The gas control valve/thermostat should be turned off by lowering the thermostat to the lowest setting and twisting the control knob on top of the valve to the “OFF” position. When you adjust the thermostat, the gas control valve/thermostat regulates the flow of gas through a manifold tube, which is a single piece of equipment.
  2. You may get rid of your water heater’s outer door from the bottom by grabbing the door with your hands and tugging the metal tabs that are attached to the outer door from their slots in the water heater’s body. In order to prevent damage to the manifold door assembly, the thermocouple, the manifold tube, and the pilot tube, the outer door is installed. Remove the two screws that hold the manifold door assembly to the tank in place and set them aside. By rotating the thermocouple counterclockwise with an adjustable wrench, you may free it from beneath the gas control valve/thermostat and remove it from the system. The thermocouple is a thin copper tube that is joined to the manifold tube on the left side. By moving the adjustable wrench counterclockwise, you may loosen the pilot tube and make it easier to remove. To loosen the manifold tube from the gas control valve/thermostat, spin it clockwise with the adjustable wrench until it is completely loose. Located between the pilot tube and the thermocouple, the manifold tube is a flexible corrugated metal tube that connects to the gas control valve/thermostat through a flexible connector. It is the longest of the three tubes
  3. It is also the biggest. Removing the wires from the pilot igniter button that is linked to the gas control valve/thermostat, as well as the wires from the two manifold burner assembly connection wires that are attached to the gas control valve/thermostat Holding the igniter wire and the two manifold burner assembly connector wires in your hand, pull them down on them until they are freed from their connections in the valve. Holding the manifold tube in your hand, pull it down and away from the gas control valve/thermostat, allowing the thermocouple, pilot tube, and manifold tube to be released from the valve. Pulling the manifold burner assembly out of the burner chamber and away from the water heater will allow you to remove it from the burner chamber. Remove the retainer clip holding the two-piece wire connection that attaches the thermocouple and igniter wires through the manifold door, and then remove the wire connector itself. Disconnect the thermocouple from the pilot bracket that is attached to the manifold burner assembly by pulling it out. Passing the new thermocouple through the hole in the manifold door where you had previously removed the two-piece wire connector, insert it into the pilot bracket and tighten it down. In order to properly reconnect the thermocouple and igniter wires, reattach the two-piece wire connector to them using the retainer clip and slide the manifold burner assembly into the water heater. Reattach the gas control valve/thermostat to the manifold tube, pilot tube, and thermocouple by tightening them with the adjustable wrench. To complete this step, reinstall the igniter wire in its original location in the igniter, and push both of the manifold burner assembly connector wires into the gas control valve/thermostat. Finally, replace the screws that were removed from the manifold door assembly in Step 2 and replace the outer door. In addition, activate the gas at the manual shutoff valve by twisting its knob in the counterclockwise direction
  4. Activate the gas supply valve/thermostat on the water heater by setting its thermostat to the appropriate temperature and rotating the gas control knob to the “ON” position

The Drip Cap

  • When your Whirlpool water heater fails to heat the water in the tank, the most likely cause is a faulty thermocouple. By rotating the thermocouple counterclockwise with an adjustable wrench, you may free it from beneath the gas control valve/thermostat. In this case, the thermocouple is a thin copper tube attached to the left of the manifold tube, and it is by far the longest of the three tubes. Holding the manifold tube in your hand, pull it down and away from the gas control valve/thermostat, allowing the thermocouple, pilot tube, and manifold tube to be released from the valve. Insert the new thermocouple through the hole in the manifold door where you previously removed the two-piece wire connector and press it into the pilot bracket to complete the installation.

Amazon.com : Thermocouple for Water Heater

Ships to the Netherlands are available. Order quickly as there are only 5 left in stock. Ships to the Netherlands are available. Only 16 of these items are left in stock – purchase soon. Sketch was used to create this design. Sponsored You can have it as soon as Thursday, March 3rd. Shipping is $81.23 USD. extremely well-liked sponsored | based on the number of customer ratings and the number of stars SubscribeSave allows you to save even more money. The Netherlands is served by this item. There are just 5 left in stock – purchase soon.

  • Tuesday, March 15-Tuesday, March 29 Ships to NetherlandsThere are only 6 of these items left in stock – purchase soon.
  • There are only 7 left in stock (more on the way).
  • With the coupon, you may save 5 percent.
  • With the coupon, you may save 5 percent.
  • There are only 8 left in stock, so place your purchase now.
  • Only 15 of these items are left in stock – purchase soon.
  • There are only 12 left in stock, so place your purchase now.

From Wednesday, March 16 through Thursday, March 31 Ships to the Netherlands are available.

SubscribeSave allows you to save even more money.

Only 9 of these items are left in stock – purchase soon.

Only 7 of these items are left in stock – purchase soon.

Tuesday, March 15-Tuesday, March 29 Ships to the Netherlands are available.

Ships to the Netherlands are available.

There are only 2 left in stock, so act quickly. Ships to the Netherlands are available. Order quickly as there are only 5 left in stock. A 5% discount is applied at the time of purchase. With the coupon, you may save 5 percent. Brands that are associated with your search

Common Water Heater Problems & How to Fix Them

In some cases, altering the thermostat can solve problems with overheating or underheating of water heaters, among other things. The optimal temperature for hot water in the majority of households is between 120 and 140 degrees Fahrenheit.

Dip Tube Problems

A damaged dip tube might possibly be the source of your rapid depletion of hot water supply. Other factors might contribute to the inability of your water heater to heat water efficiently. If the dip tube is damaged, the amount of hot water accessible is reduced. The temperature of your water may be affected as a result of this. Each tankless water heater is equipped with an LED control panel that allows you to regulate the temperature of the water. Duncan Plumbing Solutions prefers to use Rinnai tankless water heaters, which are installed by the company.

The good news is that you can raise this to 140 by following a few easy procedures outlined here: Altering the vent settings that are associated with your tankless water heater is another option.

No Water Coming From the Tank

It is possible that the heating element in the tank has failed, resulting in no hot water being produced. If your home is fueled by natural gas, it is possible that you will experience problems with the thermocouples. The replacement of these components is a simple process that you may do on your own. Duncan Plumbing Solutions also provides emergency water restoration services. If you are a do-it-yourselfer, the following are some pointers for changing the thermocouple in your water heater:

How to Replace a Water Heater’s Thermocouple

The deposit of hard water in the pipes might cause water flow into and out of the hot water heater to become obstructed. Low pressure will result as a result of this obstruction. The same thing happens when sediment builds up in the hot water tank. It is possible for water pressure from the water heater to decrease if the shut-off valve leading to the unit is only partially closed.

Annual Maintenance will help pressure problems

After you have turned off the gas or electricity to the unit, connect a garden hose to the hose bib located at the bottom of the hot-water heater tank. Drain the water from the hose by bringing it outdoors. As you open the hose bib, keep the cold water supply to the tank running to flush out any sediment that has accumulated inside the tank. Keep flushing until the water coming out of the hose is completely clean. It is important to do this annual maintenance to keep a water tank free of silt and accumulation, which can have an impact on both the quality of water and its pressure.

Noise Problems

The sound of a banging, creaking, knocking, or whining hot water tank is the worst thing that can happen to you. The silt that might accumulate within the water tank is the most common source of noise complaints. It makes a lot of noise when the material in the tank comes into touch with the heating element because the sediment burns when it does. This problem is typically resolved by flushing the tank.

Another reason that hot water heaters create noise is that the heating element may be on its way out of warranty. If you have cleansed your tank and removed all of the sediment but are still hearing unusual noises, it may be time to replace the heating element in your tank.

How Do You Know When It’s Time to Replace your Water Heater?

In order to assess if it is necessary to replace your hot water heater, you will need to take into consideration the following factors.

Contact Duncan Plumbing Solutions today!

Please consult with specialists from Duncan Plumbing Solutions for appropriate water heater repair and replacement! We have been voted Best Plumber in Waxahachie and Best Plumber in Waxahachie, and we are also a NextDoor Favorite! All for a good purpose, of course! In the event that you require quick, limitless hot water, our plumbers are skilled issue solvers and can get you well on your way! Get in touch with us right away! 972-937-0040

How to Clean Thermocouple on Water Heater

If you believe you require a new thermocouple, have you considered that it is possible that the one you now own requires cleaning? It is possible that your water heater is not heating up correctly because the thermocouple has become rusted and damaged. It is a thermocouple that detects the presence of the pilot light and allows the water heater to regulate its internal temperature. How to clean a thermocouple on a water heater is covered in this section. This is a project that even the most inexperienced DIYers can do.

  • Lint-free cloth
  • Sandpaper made of Emery cloth
  • An adjustable wrench

Water Heater Thermocouple Cleaning in 5 Steps

  1. Lint-free cloth
  2. Sandpaper made of Emery cloth
  3. Adjustable wrench

Now What?

Allow enough time for your water heater to warm up. If it’s functioning, that’s fantastic! Ultimately, if the thermocouple is still not functioning, you may have to spend the money on a replacement. The good news is that PlumbersStock provides an extensive assortment of water heater components. When you receive your replacement thermocouple, you may refer to our article on how to replace a water heater thermocouple. More information on thermocouples in general may be found at the following link: Thermocouples |

Please feel free to contact us if you have any queries about our products or if you have any inquiries regarding your home improvement projects.

Leave a Reply

Your email address will not be published.