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<!-- from fixya rte -->How to replace thermocouple - Kitchen Ranges

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Bob, you don't specify a make of model but generally, the thermocouple is the means by which the controller verifies that the pilot flame is lit and allows gas to flow. The sensor portion sits in the pilot flame and has a tube that leads back to the gas control valve. It should be reasonably easy to see how to remove and replace it when you have it in sight and the replacement part in hand.

Posted on Nov 29, 2014

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Replacing thermocouple


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A thermocouple actually slides into a keeper that it can be withdrawn from with some steady pulling with needle nose pliars at the base of the thermocouple. Some mounts are screwed and the sleeved thermocouples, keeper is mounted in this.
I almost always just pull it out from it's base.

Oct 19, 2013 | Sterling Heating & Cooling

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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

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Can't light a vulcan heritage gas heater, the pilot light lights, but as soon as I try to lift my finger off the button to ignite the heater, the pilot flame always goes off.


Hi and welcome to FixYa, I am Kelly.

What you are experiencing is the lack of a signal from the thermocouple to the gas valve. I.e. the thermocouple is not passing heat information at all. This is caused by either a defective thermocouple, a dirty mating area where the thermocouple connects to the gas valve or... an improperly positioned thermocouple that is not "in the flame" with the pilot lit.

  • First make sure the FIRE end of the thermocouple is in the flame when lit. (reposition if necessay)
  • Next disconnect the thermocouple by unscrewing the fitting on the top of the gas valve. (No gas will come out) Clean the metal mating area as best you can and then re-install the thermocouple. Just a good snug fit. Once you feel it come snug add 15 degrees of tightening motion with a wrench.
Attempt to light the pilot... wait 45 seconds to 1 minute while holding the pilot button down before letting it up. If it stays lit.... GOOD JOB. If it goes out the next step is to replace the thermocouple. If after replacing the thermocouple it does not stay lit the remedy is to replace the gas valve. There are no short cuts and the sequence of repairs is just as I stated in order.

You can remove your old thermocouple and walk in to almost any appliance parts supply or Plumbing and heating supply to purchase the correct thermocouple without a part number. They will match it up with yours.

Thanks for choosing FixYa,
Kelly

Feb 20, 2011 | Heating & Cooling

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I have a readyheater model 65-85 the flame will not stay lit im thinking thermal couple is there a way to test this part? or could it be another problem?


If your pilot light will not stay lit when you release pilot light button then chances are that your thermocouple is bad. Make sure that the tip of thermocouple is directly in line with pilot light. Tip of thermocouple should be cherry red if it is properly placed. If pilot will not stay lit then replace it. If you aren't sure about placement of thermocouple you can heat thermocouple with a seperate heat source. If you do this and pilot light stays lit then reposition thermocouple in pilot flame. If it still won't keep pilot burning then replace thermocouple. Hope this helps. Thanks.

Nov 19, 2010 | Reddy Heater-30-55,000 BTU Variable

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How to fix F7 in turbochef


F7: Thermocouple Open

CC Thermocouple

Reads 999?F/C or

IR Thermocouple
Reads 1999?F/C



1. Check the connection of open thermocouple on the I/O control board.

If the connection is OK, verify thermocouple is not an open circuit

by using your ohm meter. The cook cavity thermocouple should

measure approximately 4-5 ohms and the IR thermocouple should

measure approximately 30-40 ohms. Measure at the I/O control board

40-pin connector.

o Thermocouple indicates open circuit: Replace defective thermocouple.
o Thermocouple OK: Replace the I/O control board.

Oct 04, 2010 | TurboChef TORNADO Electric Oven

1 Answer

Easy way to replace the thermocouple


I suppose it would be easier to replace the thermocouple than the thermostat. Once you have the thermocouple in your hand, the installation is self explanatory. If you describe the problem, maybe the correct solution will come.

Jan 10, 2010 | Heating & Cooling

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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

1 Answer

Does'nt work


The most likely problem is a bad thermocouple. Pilot-equipped appliances have a thermocouple to make sure the pilot is lit before turning on the main gas flow. You'll see the end of the thermocouple looking like a metal rod sticking into the pilot flame. Replacing the thermocouple is not difficult. There's a nut that holds the thermocouple into the pilot assembly, and another that holds the thermocouple lead into the main gas valve. Universal replacements are available for under $10. Several websites have good step-by-step instructions if you need them.

Dec 17, 2008 | Heating & Cooling

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