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My Gas pilot light will not stay lit. If I take my hand off the ignition swithch it goes out. I have had the theromostat replaced but, the same thing happens.

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You probably have a bad thermocouple/pilot generator. This is a tube that is in the pilot flame when the pilot is lit. If the gas valve doesn't get a good reading from it, the gas valve won't allow ant flow. They are easy to replace, a thermocouple has a copper tube that inserts into the body of the gas valve, a pilot generator has two wire leads. The gas MUST be turned off while you change it out. If it's a tube type (thermocouple), be careful not to kink the copper tube during installation.

Posted on Aug 26, 2008

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My fathers Bosch water wizard tf 250 will not start. the water will flow but no gas will not ignite or come through the pipe to the heater. the gas bottle is full. thanks Dave Tooley


Dave, make sure that the gas valve on the Propane tank, is fully open and that the inline gas shutoff valve near the heater is turned ON. Those are the basic two things that would prevent the gas from flowing thru the gas line, to the heater.

If the above valves are ON, the problem then lies with the gas control valve on the water heater. If it has pilot light that has to be lit, make sure that the heater's gas control valve is properly in the PILOT Position, before attempting to light it. It must be able to be pushed ALL the way in and you should feel strong pressure pushing back at you (other than spring pressure). When you feel that, it's in the PILOT Position and ready to be lit. Once it's lit, continue to hold the Pilot Button in for 1 minute, then release it. If the Pilot stays lit, turn it to the ON Position.

Hope this helped you to troubleshoot and solve the problem. Please let me know. Thanks.

Jun 22, 2011 | Air Conditioners

1 Answer

Hello, i lite the pillot and and start up fire so its working and some time during the day the pillot goes out?


If you have a standing pilot that wont stay lit and you have to keep relighting it, it can only be a couple of things that will do this.
1. Try tighting the thermocouple at the gas valve. (this is a thin copper line that goes from the gas valve and goes to the pilot light.)
2. Make sure that the tip of the thermocouple is in the pilot light flame.
3. Make sure that the thermocouple is clean.

if you have done these and it still doesnt stay lit, buy a new thermocouple.

Mar 21, 2011 | Air Conditioners

1 Answer

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 | Air Conditioners

1 Answer

I have ventless natural gas heater , u can lit the pilot , but when u let up off the button the pilot goes out . have replaced thermocouple the same problem pilot will not stay lit. have also used air...


When you light the pilot, hold the button in about 1 minute to satisfy the thermocouple. Once the thermocouple is hot and satisfied, turn the gas to "ON". You may have to extend the time a bit, but 1 minute is usually enough.

Best regards, --W/D--

Jan 20, 2011 | Air Conditioners

1 Answer

The lit was out, without a manual on hand, how do I re-lit it/ Thanks.


If you're talking about a heater, you have to push, usually a red button, in, and then light the pilot gas light. Keep the red button pushed in for about a minute, until the thermocouple gets hot and turns on the gas valve, then release the rebutton, and it should stay lit. If you're having problems, you maybe have to try it two or three times, and, as soon as you can, replace the thermocouple (the long rod that gets heated by the pilot flame).
If you have a different system, such as an electric igniter, you'll have to push a button to engage it, and it should ignite. If it doesn't, it could be defective, or your valve could be going bad.
Hopefully, you will get it relit. They do blow out with random drafts, occasionally.

Dec 23, 2010 | Air Conditioners

1 Answer

Why would the pilot light ignite then turn off?


If it is a true "pilot" light, it needs to be held down long enough to generate the milivolts needed to prove to the gas valve that he is ready to open, other wise the gas valve would open, not igniting, thus causing a "gas leak". Turn the t-stat OFF, turn gas valve to pilot, push down on pilot knob, light pilot and hold for 2 minutes. After 2 mins let go, and if pilot stays lit, turn gas valve to ON, and turn the stat to heat and turn it up to desired temp. If pilot does not stay lit after doing above, try sanding thermo couple( the thing the flame is sitting in) or just spend the $15 bucks and replace therm couple. azeddysac@yahoo.com

Nov 06, 2010 | Ruud UAPA024 Air Conditioner

1 Answer

Can't find instructions on lennox gf 8 series furnace


Does it have a standing pilot light? On new units, there is an igniter and not a pilot. But if you have a standing pilot, you will move the gas valve to "pilot" and push down the red button while holding a flame under the pilot located by one of the jets. Once it lights continue to hold the button down for a minute or so and then release the button. The pilot should stay lit. Then turn the dial to the on position. That's it.......... If the pilot won't stay lit then the thermocouple is bad and needs to be replaced.

Apr 05, 2009 | Air Conditioners

1 Answer

The heater in my central heating is not getting turn on but the fresh air and cooling is getting turn on


Check the pilot light.Older standing pilot systems use thermocouples to verify the pilot is burning before the gas valve opens.If the pilot wont stay lit replace the thermocouple.
Newer systems light the pilot.On a call for heat the igniter lights the pilot. When the heat is verified the gas valve opens . Some systems use an circuit board with flashing led lights to help troubleshooting.

Jan 11, 2009 | Air Conditioners

2 Answers

Pilot light will not stay lit


is it full of dust my hot water used to do the same till i blew the dust and fluff out

Nov 18, 2007 | Air Conditioners

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