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I have a heater in a barn that is probably 30 yrs old and I can't get the pilot to stay lit. I think the wind is blowing the pilot out through the 4 inch vent but i am not sure. Do I need to try something with the vent or do you suggest something else? Any suggestions are welcome. Thank you.

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You could put a wind cap on it they are cheap. And if that don't work you need a new termocouple.

Posted on Dec 03, 2008

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The wind keeps on blowing out pilot light in the Intertherm Gas Furnace


The wind is probably not the culprit here. You probably have a crack in the heat exchanger, which allows the air from the blower to escape and blow out the pilot light.

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I have a six-year old AO Smith Model 50-100 that goes out intermittently and is getting harder to light and stay lit. Had the thermocouple replaced today, and it still won't light and stay lit. I am...


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Pilot wont stay lit when you release button we replaced the thermocouple stii no luck. the heater is a 2500 hayward


Two things could be causing this: A dirty pilot (especially if the pilot flame is curling up,away from the Thermocouple. Or when you installed the new thermocouple, you overtightened it.

To clean the pilot use canned air with a straw nozzle (like you clean your computer with) to blow out the pilot tip and the surrounding parts of the pilot assembly.

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1 Answer

Once I press the button to start the heater must wait a good 30 seconds or more before it stays lit when button is released.


That's normal. It's the correct way to allow the the Thermocouple and/or Thermopile to fully heat up.
If you have been turning the pilot light OFF after each use and then relighting it when you want to use the heater, that's really not necessary. Leaving the pilot lit during the heating season is a better way to go. If you think you're saying gas by turning the pilot light OFF and then relighting it again, when you want heat, you're really not saving a significant amount of gas or money. The pilot burning continuously, uses very little gas.

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Yes, removing the glass is safe, if you do it carefully, so as not to break it. Put it well out of your way, after removing it. In fact, removing it is the only way to access and service the Pilot Assembly and the Burners.

If the pilot won't stay lit, there are several things that can cause this on a Direct Vent Gas Fireplace:
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  • Wind is blowing back through the direct vent, blowing out the pilot.
  • Low gas pressure
  • A dirty pilot.
  • The thermocouple and/or Thermopile (part of the pilot assembly) has failed.
If you can provide me with the make and model number of your gas fireplace, I may be able to furnish you with an Owners Manual, that will help you to continue to troubleshoot the problem.

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If the fan comes on and blows out the pilot light then you need a new furnace because that's the sign of a crack in the heat exchanger. Need a little better description. Do the burners light then the fan come`s on and then it goes out completely?

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Bad thermocouple that senses the heat from the pilot light. This would be evident if you lite the pilot while holding the button down for about 30 seconds. If the pilot goes out as you release the button on the gas valve replace the thermocouple.

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Pilot light will not stay lit


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