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My goodman furnace (model gmp 108-3) is not working. If I turn off the unit and turn it back on the fan comes on and the little filament heats up, then the top burner will light, but it will not stay lit and none of the other burners will light. After a few tries, it turns off and doesn't come back on.

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All of the burners should light. Could be a dirty flame runner. I recommend that you get a good clean and check.. Burners, flame runner, flame sensor should all be cleaned. If this does not solve your problem than the gas pressure needs to be checked.
Good luck....

Posted on Apr 03, 2009

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