Water heater thermocouple buyers guide, troubleshooting, repairand step by action replacement guide.

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Thermocouple replacement is a simple process. If her handy through tools friend shouldn"t have any problems.

Go to thermocouple parts page.


Thermocouple Buyers            Guide

Standard style

Also referred to as universal water heater thermocouple. The screws into thebottom of the gas valve and also a probe on the other end slides right into a holding bracket close to the pilot light. That looks prefer a piece of copper wire ( view pic. Below).

This thermocouple has actually a appropriate handed thread. Turn best to tightenleft to loosen. Global thermocouples come in lengths indigenous 15 to 36 inches. One 18 or 24 inch will suffice for every residential water heaters using universal kits.

Almost all older waters heaters and also many that the newer style unitswith a sealed burner compartment and a viewing home window will usage thisthermocouple.

If you desire to use an exact replacement length just remove your old one and measure it.

TCO style

Thermal cut Off layout has a resettable heat shut off switch integral right into the thermocouple. In the occasion of a speed fire or blow ago from the burnerthe TOC will shut under gas circulation to the burner and also pilot.In situation of a shut down the TOC should reset chin after it cools downand permit you to relight the pilot.The TOC move looks favor a watch battery.You will certainly only discover the TOC on newer layout water heaters v seal burnercompartments.

TOC non-resettable style

These thermocouples have a small TOC build inside the tube. Castle looksimilar to a typical one other than the diameter is larger around midwaysof the tube.When this TOC"s switch turn off they will not reset and also must it is in replaced.

Whirlpool Water Heater Thermocouple

Some of Whirlpools older model water heaters were developed with a left-hand subject thermocouple. Turn come the left come tighten, right to loosen. These are no much longer available.

Lowe"s home advancement sells a Manifold Door Assembly for Whirlpoolwater heaters. The comes with a thermocouple attached. Expense is about$35.00. Your website Lowes.com

You can also purchase one directly from Whirlpool at around the sameprice. Their costumer service number 1-866-698-2538.

these water heaters were constructed by American Water Heater Co. Lock havea most "how to" replace parts guides for your water heaters. Followthe attach below.

American Water Heater Co.

How thermocouples work

A pilot thermocouple sends a small electrical current to the gas valve once the probe is heated to a specific temperature.This electrical current tells the gas valve that the pilot is lit and its ok to send gas to the burner if the thermostat calls because that it.

To examine a water heater thermocouple press the pilot switch down top top the water heater gas control valve. Irradiate the pilot. If after ~ holding the pilot button down 30 to 60 seconds the pilot light goes out when you relax the button, the thermocouple is most most likely at fault on olderunits. The TOC or air flow can be the problem on more recent units v a pilot light viewing home window .

If the pilot does not light at all the difficulty is gas flow, gas regulate valve, TOC tripped.

The most typical thermocouple problems

The pointer on the thermocouple probe has deteriorated.Lack of air (oxygen) ~ above seal burner water heaters.

Thermocouple Repair

If the probe watch white this is carbon build up. It can keep the probe from obtaining hot sufficient to send a signal to the gas valve. Sand it v emery cloth and relight the pilot. It have to work for a while yet keep a new thermocouple handy.

The thermocouple probe must be in the pilot light flame.

The thermocouple need to be screwed right into the gas valve tightly.

Check the pilot thermocouple tube for kinks.

Water heater thermocouple replacement

Thermocouple replacement is a an easy process. If your handy with tools girlfriend shouldn"t have any type of problems.Always follow all security rules when working about gas.

A global water heater thermocouple have the right to be uncovered at many hardware stores.

In the guide listed below I"ve gotten rid of the burner assembly for this reason you deserve to see just how the thermocouple is positioned beside the pilot.

How To replace A Thermocouple


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The pic on the left is the waterheater burner assembly removedfrom the water heater.

The thermocouple is located next to the pilot head.


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Turn the gas turn off to her water heater.

Set the temperature regulate knob(on the gas control valve)to the shortest setting.

Turn the on/off pilot regulate knobto the off position.

Remove the outer and inner burner assembly access panels.

Remove the thermocouple from the gas manage valve making use of a 3/8 in.end wrench (see photo above).

Reach into the burner compartment and also pull the thermocouple the end ofits holder.A tough tug have to do it.

If friend can"t pull it out, skip the next step and also scroll under this web page forinstructions to remove the burner assembly.


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Got the thermocouple out? Good.To download the brand-new one, usage a flashlight therefore you deserve to see andslide the probe right into place.

The reminder of the probe must be 1/8 come 1/4 in. Happen the pilot head.

Attach the other finish to the gas control valve.

Remove the Burner Assembly


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Ok, you"ve disconnected thethermocouple native the gas controlvalve however can"t get it freed from theburner assembly.

You"ll need to remove the water heater burner.

Using a 7/16 in. End wrenchdisconnect the pilot supply tubefrom the gas regulate valve.


eliminate the burner assembly indigenous water heater.

Now you have the right to remove the thermocouple through a pair of pliers.

Slide the brand-new water heater thermocouple into place. Positionthe tip of the probe 1/8 come 1/4 in. Pass the pilot head.


Reinstall the burner assembly

Be sure that the end of theburner assembly fits right into the slotthat holds that in ar (see picture).

When your finished examine allconnections for gas leaks.

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With your water heater thermocouple and also burner assembly installedyour ready to light the pilot light.