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Model # GMPN100-4 Furnace will not start...

Furnace will not start. Getting a continuous flash--twinning? Don't really know how to resolve this one... Any ideas? Thanks, Johnny

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Re: Model # GMPN100-4 Furnace will not start...

When you remove the panel there reset button press on it

Posted on Jan 19, 2008

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If you are having trouble with you gas furnace they are really not that complicated to figure out. Most of the newer gas furnaces within the last 10+ years have a flash code on the circuit board inside the furnace. The trouble codes are in flashes. For example: 1 flash means ignition problem, 2 flashes mean vent pressure switch, 3 flashes means control board problem and so on. The first thing to do would be to check for a sight glass or window in the blower door to see if there is a flash code. Then you can pull off the blower door to check to see what the code represents. The code chart is usually located on the inside of the blower door.
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