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How to replace thermocoupler? - Water Heaters

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2 Answers

How do I replace a thermocouple?


Need the make and the model number of the heater.

Sep 29, 2016 | Water Heaters

1 Answer

I replaced the thermocoupler and it still will not stay lit.


is the tip of thermocouple in the flame of the pilot.
where the thermocouple screws into the control valve you just tighten it hand tight and then 1/16 of a turn. or you might have damaged the magnet.
is the flame big enough on the pilot light as it might need the jet cleaned.
failing all that then the magnet in the controle valve where the thermocouple screws in has failed and needs replacing if your model will allow.

Sep 28, 2016 | Whirlpool 6th Sense 40-Gallon 6-Year Tall...

1 Answer

The gas was on when the pilot first went out. After replacing the Thermocouple I turned the gas back on before many attempts to relight the new thermocouple.


Well a thermocouple does not prevent the pilot light from being initially lit while holding down the pilot button. The thermocouple just keeps it lit after releasing the pilot button. So I am guessing ur lighting issue is not the thermocouple. So either no gas in line or you have a gas valve issue.

Mar 20, 2015 | Water Heaters

1 Answer

How do I replace the thermocouple on Maytag hot water heater


Could be thermocouple.
Might also be lack of air supply, or low gas pressure, or bad gas control valve, or tripped FV system due to lack of air supply:
http://waterheatertimer.org/How-to-test-water-heater-thermocouple.html
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

Mar 19, 2013 | Water Heaters

1 Answer

How to replace thermocouple in 42v50-50f


Copy following link:
http://waterheatertimer.org/How-to-replace-thermocouple.html

Rheem 42V50-50 is ordinary atmospheric-vent gas water heater with mechanical (non-electronic) gas control valve, which says that unit has ordinary thermocouple, and not thermopile.
Buy generic thermocouple from local hardware.

To replace the thermocouple you need to remove entire burner assembly from water heater, and have replacement Burner access door gasket on hand. 1-800-268-6966
Combustion door held in place with tamper-proof screws

Since the water heater problem may be more complicated than just the thermocouple, and water heater flame arresor screen may need to be cleaned, and burner parts cleaned, door gasket replaced, and gas pressure checked, and piezo electrode checked, it might be best to have qualified service technician do the work for $300.

Jul 28, 2012 | Rheem Water Heaters

1 Answer

Pilot keeps going out after it cycles a few times


Hot water heaters that have problems with pilot lights going out are usually fixed by adjusting or replacing the thermocouple. The thermocouple is the brass tube that is in or near the flame of the pilot light. The thermocouple acts as a valve to allow the gas to flow to the pilot light. If the thermocouple begins to go bad, it may shut the gas flow off to the pilot light. There could be other gas supply issues, but this is about the least expensive first step for the home owner. REMEMBER, you are working with gas. Take your time and be safe or have a professional replace the thermocouple.

Sep 15, 2010 | Reliance & Pilot Assembly for Natural Gas...

1 Answer

Pilot light goes out each time the jets stop heating


Hello,
This is most likely a thermocouple problem. Try replacing the thermocouple. If it still does it then the draft from the fire is pulling so hard that it pulls the flame away from the thermocouple just after the flame goes out. readjust the way the pilot flame hits the thermocouple to keep it on the thermocouple...

Heatman101

Mar 21, 2010 | Little Giant Water Heaters

1 Answer

The pilot light on my gas water heater continually goes out. I can re-light the pilot and get it going. The gas burners goes on runs for awhile. I'm assuming when that when the temp hits the desired temp...


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The pilot assembly should look similar to the pic above. Depending on where you live, you may be required to hire a certified plumber to replace the parts. If not you can do it your self. Keep in mind if it's not staying lit you also need to check the thermostat and the thermocoupler before replacing the pilot assembly. There is a good chance it is just the thermocoupler going out. It is one of the first things to check when troubleshooting a pilot light problem with a gas water heater. A thermocouple determines if the pilot light is lit. If it's not lit, the gas valve fails. If that's the problem, replace the thermocouple.


  1. Shut off the gas valve on the water heater and the gas valve on the line near the heater. Remove outer and inner doors, and loosen the pilot and supply tubes and the thermocouple connections to remove the burner assembly.
  2. Step 2 Loosen the screw holding the thermocouple to the bracket. Remove old thermocouple. Bring it with you to the store to ensure you are buying the proper replacement.
  3. Step 3 Install the new thermocouple. Position the thermocouple so that the pilot flame heats 1/2 inch of the tip.
  4. Step 4 Reinstall burner assembly in the water heater. Tighten burner supply tube, pilot tube and thermocouple connections. Tighten thermocouple no more than a quarter turn more than hand-tight.
  5. Step 5 Turn on both gas valves. Check supply tube and pilot tube for leaks with soapy water. If soap bubbles, tighten connections to fix leak. Ignite the pilot light, and make sure the thermocouple tip is heating up. Replace inner and outer doors.

Jul 09, 2009 | Northern Tool Water Heaters

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