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I replace my 18 inch thermocouple with 36 inch thermocouple does this makes a difference

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No it will work fine .

Posted on Dec 17, 2016

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Charmglow ventless lp gas fireplace model CGL300TQ pilot light wont stay lit, how do i know if its thermocouple or regulator?


if the therocouple has packed up pilot light will not light thermocouple has long small diameter pipe leading to a larger end this needs to be above the pilot flame also for safety have a small bowl of soapy water with a brush wet the nut with soapy water in no bubbles appear then try lighting heater thermocouples don't last that long

Jan 26, 2013 | Rheem 36" Water Heater Thermocouple Kit

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How to take off the thermal couple off a ge sg40t12txk


1) Copy following links:
http://waterheatertimer.org/How-to-replace-thermocouple.html
http://waterheatertimer.org/How-to-repair-Rheem-TRD.html

2) GE is made by Rheem, so air intake screen is located below the combustion burner, as is the TRD (thermal reset device).

3) Modern gas water heaters, the FVIR, or FV system will trip when air intake gets clogged with dust.
This will slow venting of hot combustion gasses, except burner is still burning same amount of fuel. Overheating occurs, and that trips FV system.
Other brands require cleaning air intake screen and possible replacement of gas control valve, or FV sensor, etc. Each model is different.
Rheem_GE overheating will trip TRD, and glass vial breaks, causing air intake to close. Glass vial must be replaced, and possibly the gas control valve replaced.

Dec 18, 2012 | Rheem 36" Water Heater Thermocouple Kit

1 Answer

Believe I need to buy a Rheem Water Heater Thermocouple. Where do I find them?


If thermocouple is from ordinary tank-type water heater, then it is a generic part with different lengths 15" 17" 21" 24" 30" available at hardware of home center.
I suggest reading manual for installation information, advisories, and required maintenance.
http://waterheatertimer.org/pdf/Rheem-Ruud-water-heater-parts-guide.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html#clean

There are good utube videos on replacing thermocouple.
Tip of thermocouple has to be positioned in the pilot flame.
The heat on tip of thermocouple causes millivolts of electric current that travel back to the gas control valve and the electrical signal causes gas control valve to keep gas flowing down the pilot tube to the pilot light.
If pilot light blows out or if pilot tube is clogged and needs to be cleaned, or if gas valve has gone bad, then tip of thermocouple cools down and electric signal back to gas control valve causes gas control valve to shut off gas going to pilot.

When attaching thermocouple to gas control valve, it is finger tightened.
Be careful and do not cross-thread thermocouple. Just use your fingers to start the nut.
Finger-tighten thermocouple and then add 1/4 turn using small wrench.
The end of thermocouple has a small piece of insulation that isolates the electric current from body of gas control valve. If thermocouple is overtightened, the insulation is crushed, and electrical current millivolts short out and no signal reaches gas control valve, so gas control valve keeps gas turned off to pilot tube.

If this is a tankless water heater, then open following link with troubleshooting resources and contact information for Rheem.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

May 20, 2011 | Rheem 36" Water Heater Thermocouple Kit

1 Answer

Reliance 40 gal 32,000 btu pilot light not staying on


Replace thermocouple--its the small copper rod that comes from flame to gas valve--usually 24-36''long be gentle with new one,home depot or hardware will have Rich- ps make sure you hold pilot button for about 30 sec. when relighting

Jan 30, 2011 | Reliance Water Heaters

1 Answer

POILET LIGHT WILL NOT STAY LIT


tip of thermocouple not touching the flame enough..or need to replace entire pilot assemble chk front of w/h for 800 number for warranty info..

Nov 25, 2010 | Rheem 36" Water Heater Thermocouple Kit

1 Answer

I have a gas hot water heater and the pilot won't stay lit. I replaced the thermocouple and it worked for a couple weeks but I'm back to the same problem. When I light the pilot, it works just fine...even...


Typically, if you have replaced the thermocoupling and are still experiencing problems, it means the master control valve is bad. It also may be a venting problem, which I would not rule out. If you call the manufacturer with model and serial number, they will be able to help you better diagnose your problem.

Nov 16, 2009 | Rheem 36" Water Heater Thermocouple Kit

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

2 Answers

Pilot light won't stay alight, when i release the knob after lighting, the flame goes out.


hello!! if you changed the thermocouple & the pilot still goes out !! could be a thermostat ( the electromagnet pilot safety ) goes bad !! make sure pilot is clean & should be sharp BLUE pilot !! not yellow & soft !! also hold down the button light the pilot use a digital volt meter set on dc milivolts a brand new thermocouple should test @ 30 milivolts+ - ! & if you have new style water htr with sealed combustion the thermocouple has a safety part of it ! change the thermocouple & make sure your vents for combustion air around the bottom of the water htr has lint & dust built up !!! kiddbrother i work for a gas company doing service !!

Dec 14, 2008 | Rheem 36" Water Heater Thermocouple Kit

1 Answer

Pilot wont stay lit


I'm assuming that you changed the Thermocouple due to the fact that your posting here.

The First thing I can tell you is to bring the Thermocouple back to the store and exchange it for a new one. Not often but once in a while you can get a defective thermocouple even though it's brand new.

When you install the new one you may have to adjust the position of the probe so that it is directly in the path of the pilot, that is important. Make sure the nuts are snug.

Let me know how it turns out.

Dec 02, 2008 | Rheem 36" Water Heater Thermocouple Kit

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