GMP075-3 furnace will not light


Old 10-24-08, 07:47 AM
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GMP075-3 furnace will not light

I have a Goodman GMP075-3 REV B furnace. The ussual operation is the vent blower starts, the ignitor lights and the gas comes on. Sometimes the sensor gets dirty and I have to clean it but, this time the vent blower does not start and the ignitor does not light but, the furnace fan does start. When this is happening the "status" indicator light on the curcuit board in RED. Not flashing - just solid red.
Can anyone help me understand what this means and how to fix/ bypass?

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Old 10-24-08, 08:23 AM
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Shut off the furnace and wait about 30 seconds, then turn it back on, for it to reset. Then we can diagnose the problem, from there.
Old 10-24-08, 08:39 AM
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Bypass - only for diagnostic purposes; fix - perhaps.

After a reset, check to see if the tstat is calling for heat by checking voltage across heat (Y) to common (C).

Are you getting power to the draft inducer (vent blower as you call it). If so check for blockage or remove and see if it can free wheel.
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