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My furnace fires up and runs for about 30 seconds,, then the gas shuts off

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  • pigeonflier Sep 18, 2008

    No pilot light,, the furnace fires,, then after the blower kicks on it will run for about 30 seconds,, the the flame cuts off

  • pigeonflier Sep 19, 2008

    Yes,, it has the glow ignition,, no spark..

  • TexNOz May 11, 2010

    The flame proving sensor has failed. Just to clarify, this unit does not have a pilot light, right?

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First we need to understand what is probably happening by understanding how this unit works.
A flame safety senses a flame and if one is not present it shuts off the gas supply. This safety is incorporated to make sure that if the flame goes out for any reason, it doesn't continue to dump gas into the furnace. Because I have no idea what type of sensors this unit uses, can you explain to me what kind of ignitor it has? See if it has a spark, or a hot surface ignitor. The hot surface ignitor will glow very bright white but looks like it's made of ceramic.

Posted on Sep 19, 2008

  • TexNOz Sep 19, 2008

    Replace the part that glows and it should work fine.

  • ash_moe_99
    ash_moe_99 Dec 31, 2012

    no it needs flame sensor sanded or change air filter it getting to hot

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