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My water heater will not stay lit.

MOD # FG1H5040T3NOV We replaced the thermo couple and it stayed lit for 1 day and then went out again and will not stay lit.

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  • 282 Answers

Make sure that you used the correct thermocouple. If so then you probably have a bad gas control valve. Also make sure that there is a drip leg in the gas line.

Good luck,

Marty

Posted on May 14, 2014

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Posted on Jan 02, 2017

  • 21 Answers

SOURCE: Rheem 50 Gal Hot Water Heater will not stay lit

On the back of the gas valve (where you turn the temp up) there is a stem that actually goes into the tank that senses the temprature of the water it could be dirty or buried in sediment depending on how old the tank is, or just bad. if the tank is over 10 years old i wouldn't bother replacing the gas valve, the tank is probably not far behind. A new valve will run around $100.00 maybe a little less. You wont find it at menards or home depot in stock but they may be able to order it for you. Menards sells rheem products or try you local plumbing supply house. REMEMBER TO RELIEVE THE PRESSURE ON THE TANK BEFORE YOU WORK ON IT. IF YOU CHANGE THE VALVE DRAIN IT FIRST!

Posted on Feb 10, 2009

john224
  • 1378 Answers

SOURCE: Natural gas hot water heater not stying lit

Probably a bad solenoid in the gas valve. Higher voltage of a new thermocouple keeps it open longer but it still fails over a period of time. Look into a new gas valve for the water heater.

Posted on Dec 17, 2009

c7121
  • 160 Answers

SOURCE: The pilot light & will stay lit. untill the burner cycles on/off

MAKE SURE THE BURNER TUBE AND ORIFICES ARE CLEAN. MAKE SURE YOU HAVE THE PROPER LP PRESSURE.

Posted on Jan 09, 2010

kel1guy2002
  • 3740 Answers

SOURCE: pilot light on water heater wont stay lit

The thermocouple has failed. It is the temp probe that goes from the pilot lite burner area to the control valve. Go to your local plumbng repair shop and buy one. Most appliance parts stores have them also. Take the old one with you and they will hook you up with an exact replacement. They are not that hard to change. Usually a nut or 2 screws in the temp bulb area at the burner end and a nut that threads into the control valve.
Make sure before you install the new one that the area where it mates to the gas valve is clean. Should be about a 20 min job including clean up with replacement parts in hand.

Posted on Jan 23, 2010

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  • 454 Answers

SOURCE: I have a Rheem 50 gal. natural gas water heater

The most common reason a pilot light will not stay lit is a bad thermocouple. How old is the water heater? If the pilot light will light, but then go out when you release the safety button, that is a sure sign the thermocouple is bad. You can buy a replacement thermocouple at your local home improvement store. There is a small chance that the control valve has gone bad, but that is highly unlikely.

Posted on Feb 23, 2010

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1 Answer

My water heater pilot light won't stay lit


I would try cleaning the thermo couple surfaces with some steel wool... Both where the flame contacts the sensor, and the electrical contacts. Even a small increase in voltage may be enough to hold the pilot valve open. Both black, and white soot on the sensor end, can act as an temperature insulator, lowering the output voltage.
As for finding the part numbers for replacement: http://www.reliancewaterheaters.com/media/48391/242117_RPPCR01111-Reliance-Parts-Catalog.pdf

Feb 17, 2016 | Water Water Heaters

1 Answer

My water heater pilot light will not stay lit


1) Copy following link for troubleshoot by type of gas control valve:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

2) Clean air intake located on bottom of heater of American, State, Craftmaster, Reliance, Whirlpool, Kenmore
http://waterheatertimer.org/images/Flame-trap-inspection.jpg

3) Gas control valve thermostat might be bad.

Dec 06, 2012 | Whirlpool Water Heaters

1 Answer

Rheem 22V50F1 pilot won't stay lit. Changed thermo couple & it lit, ran then went out. Let it sit overnight & it lit, ran then went out. What next? p.s. The unit is 5 years old. Thanks


If pilot lights and flame is robust and clear blue, and pilot goes out later, then some suspects can be excluded: air in gas line, low gas pressure, thermocouple is overtightened (finger-tight + 1/4 turn), thermocouple not positioned correctly in the flame, dirty pilot tube.
If flame is yellowish and small: then clean pilot tube and combustion parts.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#clean
Remaining suspects can include: air in gas line, low gas pressure, bad gas control valve, tight house so household vent fans pull air down water heater vent that blows out pilot, hot attic with inadequate ventilation, water dripping down vent.

Open following links to read troubleshoot resources.
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Aug 16, 2011 | Rheem 50 Gallon FVR NATGAS Water Heater...

2 Answers

Pilot light won' stay lit on water heater


Why do you think the regulator has anything to do with the thermo-couple?if its not the thermo-couple its the flame sensor,you failed to give me the model number of the heater.when does the pilot go out.If its when the gas valve opens its the sensor.

Mar 17, 2010 | Rheem 40 Gallon FVR NATGAS Low WATER...

3 Answers

Pilot light on water heater wont stay lit


The thermocouple has failed. It is the temp probe that goes from the pilot lite burner area to the control valve. Go to your local plumbng repair shop and buy one. Most appliance parts stores have them also. Take the old one with you and they will hook you up with an exact replacement. They are not that hard to change. Usually a nut or 2 screws in the temp bulb area at the burner end and a nut that threads into the control valve.
Make sure before you install the new one that the area where it mates to the gas valve is clean. Should be about a 20 min job including clean up with replacement parts in hand.

Jan 23, 2010 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

Wont Stay Lit


I would suggest that you replace the thermo-couple. It is a long, slender copper "wire" that runs from the control unit to inside of the unit. THe thermo couple's job is to regulate the pilot light and the lit flame as well.

They generally cost about $10 and take 10 minutes to replace. Some of them are reversed threaded (rights loosen, lefty tighty) and some of them are regular threaded (righty tighty, lefty loosen). TUrn off the gas supply at the meter or an external valve and remove the thermo couple by unthreading it at the control unit. Bring that with you to the hardware store (lowes or Homedepot) to make finding the correct one a simple task.


I hope this helps.

Apr 24, 2009 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

Honeywell water heater. It's about 2 1/2 years old. I went to press the red button because the water was cold and it never got hot. The pilot is completely off and it won't go on after I press the red...


turn the gas valve button to piliot position, push it down and hold it, click the ignitor to light it... look thru the site glass to see the spark all at the same time, if it lights hold the button on the gas valve down for 30 seconds, let it up if it doesn't stay lit you need either a thermo coupling or a gas valve thermo coupling would be the first choice, the is also a filter around the bottom of th tank near the floor it needs to be clean that is the only soirce of air to run the heater

Apr 21, 2009 | Water Heaters

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