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My 650yort pilot light keeps going out. I replaced the thermocoupling and it worked for 2 months and now I am having the same problem. What next?

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6ya6ya
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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: intermittent pilot and burner

sounds like ur gas valve solanoide is done . depending on what type and age it is , it will have either manual or electronic ignition . one last shot wourth trying iis the jet may be slightly blocked, remove it and blow it out with a compressed air line do not try cleaning it with a wire or similar. put it back together and try firing it up. good luck .ps what part of the world do u live because these arent a common house hold appliance in ireland they are only used in commerical building,s over here.

Posted on May 01, 2009

  • 6 Answers

SOURCE: water heater pilot light won't stay lit

Only thing left to change is the gas valve assembly.

Posted on Jun 15, 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

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3 Answers

U can light the pilot lite,turn 2 ON it will stay lit 4 a couple of minutes then go out? If u turn the knob 2 low,med. It goes out pretty much immediately?I changed the thermocouple,blew the lines ou


Is the thermocouple secure, routed properly, no kinks, no sharp bends? Is the end of the unit properly aligned so the hottest part of the pilot flame is hitting the unit. Did you hold pilot switch in the light position for at least 30 seconds, before you set the gas valve to on? If all above OK, try this. Light the pilot using barbeque lighter once it lights keep the lighter on the t-couple for 30 seconds, then set the valve to ON and keep the lighter where it is. Once the main burner lights, remove the lighter. If the burner and pilot go off, your gas valve is bad.

Feb 17, 2015 | Rheem Richmond 75 Gal Natural Gas 6 Year...

3 Answers

I have a Rheem PG50T9A gas hot water heater. We had hot water this morning. When I came home the pilot light was out and won't stay lit. Any ideas?


Hopefully just the thermocouple. The thermocouple is the small rod right next to the pilot light. The flame on the pilot heats up the thermocouple and keeps the gas valve on. You can replace it yourself. The thermocouple will be connect by a small nut on the underneath side of the valve, and you will have to pull the thermocouple out of the pilot assembly. Not an expensive part, you can get it at any hardware store. Hope this helps you .

Apr 21, 2011 | Rheem 50 Gallon FVR NATGAS Water Heater...

2 Answers

The pilot light on our tankless water heater will not stay on.


The pilot light has a thermocouple that allows gas to the pilot light while the flame is burning. If flame goes out it shuts gas off to the pilot jet. It seems that your thermocouple is faulty and needs to be replaced if pilot light keeps going out

Sep 20, 2010 | Bosch 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...

3 Answers

PILOT LIGHT KEEPS GOING OUT.


If the pilot flame is weak, when the main burner is ignited, there can be enough 'whoosh' of air and gas to blow out the pilot. There may be a little of grit in the pilot valve jet hole restricting the flow, hence the weak flame. Try using a piece of fine wire to clear the obstruction. If that does not help the pilot jet will have to be unscrewed and cleaned with compressed air. Ensure the gas is turned off before attempting any maintenance.

Sep 13, 2010 | Reliance Water Heater #6-40-GBRS 40GAL...

2 Answers

Pilot light keeps going out


Either the pilot light orfice is dirty, and you will need to pull it out and clean it, or the thermocouple is bad. If the pilot goes out as soon as you let the button go then it is most likely the thermocouple. If the pilot stays lit for a few days or hours then you will need to clean the pilot orfice, heres how:
1 turn off the gas supply
2 unhook the main burner gas line from the thermostat, this is the line that goes to the burner
3 unhook the pilot supply line it is usually next to the main burner line
4 unhook the thermocouple from the thermostat
5 remove the burner assembly
6 take the orfice out of the pilot line and clean it out by blowing thru it, use an air compressor if needed.
7 reassemble and light pilot

Apr 08, 2010 | Reliance & 30 Gal LP Gas Water Heater

1 Answer

AO Smith water heater about 4 years old pilot went out took out piolt assembly cleaned and was able to relight pilot unit stayed working for about 2 weeks and went out again any ideas?


It sounds like your flame detector (usually a thermocouple) has gotten weak and when you cleaned the pilot the stronger flame was able to generate enough power to keep the gas valve working. If you replace the thermocouple your problem should go away. If a new thermocouple will not keep the gas valve operating...the coil in the gas valve has gone bad and you will need to replace the gas valve assembly. (most valves do not have replaceable coils).

Sep 10, 2009 | Reliance Water Heater #9003531 NAT Gas...

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

My pilot light will light, but will not stay lit? I have a gas whirpool water heater aprox 1 1/2 years old.Thisis the first time we have encountered any problems with our appliance.


Once the flame has struck it heats up a thermocouple that in turn holds the gas valve open

It is a safety measure in case the flame blows out and the gas keeps on coming.

Sometimes the end of the thermocouple gets dirty and a scrub with a fine emery board does the trick

If not it is a new part (They are not that expensive)

Jul 07, 2009 | Whirlpool Water Heaters

7 Answers

Whirlpool water heater pilot light does not stay lite


I have a Lowe's Whirlpool water heater. I've experienced the same problems as I've seen described here. My pilot light started going out several times a day. It was not such a big deal, the tank is well insulated so the water would stay warm - I'd just re-light the pilot before going to bed and before going to work. That worked well for about three days, but the problem got progressively worse until it just would not light at all. I replaced the thermocouple with a Honeywell universal thermocouple that I got at Home Depot - that did not solve the problem. I'm very handy, so I decided instead of going through warranty service and having to wait three or four days for replacement parts, I'd buy a new gas valve at Lowes and try that. It cost $54.00 and it worked. By the way, I put the original thermocouple back in and the pilot light stays lit - it was definitely the gas valve and not the thermocouple in my case. It was a real pain to do since I had to drain the tank, but it only took about three hours total. From what I've read, these things last anywhere between six months and two years. That's ridiculous, but at least I have hot water now. If you are reading this because you are considering purchasing a Lowes hot water heater, DON'T!!! I started my search for a replacement gas valve at Home Depot, but they don't stock them. Lowes had 8 on the shelf. That tells you something right there - the water heaters Home Depot stocks don't need to have the gas valves replaced before the tank wears out - there's no demand for the valves so Home Depot doesn't stock them. Lowes probably sells 8 of them a week - all the boxes were shiny and new, not dirty and dusty like some items get when they sit around in home improvement stores.

Nov 11, 2008 | Water Heaters

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