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Old 10-06-2010, 02:42 PM   #1
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furnace won't ignite

I have a Goodman furnace model GMP100-3 when turned on the vent motor comes on for a few seconds then I can here what sounds like the gas coming in then it shuts right back off, the exaust fan continues to run. The ignitor does not get hot and the blower motor does not come on after 3 cycles of this the status light blinks once, any ideas as to what may be happening here?


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Old 10-06-2010, 03:06 PM   #2
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furnace won't ignite

not familiar with that model but, look on panel for 1 flash failure code. could be open in hot surface ignitor, diff pressure switch not closing, or one of the other safety devices in series with the 24vac ckt (those are my guesses in order).


Last edited by TimPa; 10-06-2010 at 04:06 PM.
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Old 10-06-2010, 04:27 PM   #3
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furnace won't ignite

HSI hot surface igniter is probably burnt out.
"Cut it twice and it is still too short".
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Old 10-06-2010, 05:20 PM   #4
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furnace won't ignite

Just slow, not stupid.
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