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The pilot will not stay lit - Heating & Cooling

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  • mz47 Jan 09, 2009

    Pilot Lights stays on only when button is held in. As soon as it is released it goes out. No exterior drafts noted.



    A diagnosis is appreciated.

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  • 34 Answers

Probably need a new thermocouple, check to see if the flame is dancing around.  you may be getting a backdraft from the flu or if you have a crack in the heat exchanger the supply air could be blowing it out.

Posted on Dec 02, 2008

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Thermocouple keeps the pilot lit.
Thermopile keeps the burner lit.
Please specify what won't stay lit...
If it's the burner, you may need to change the thermopile as well.
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Hope this helps. Feel free to share what you found. Thanks.

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