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Goodman pgb 0300751 gas package unit. The unit started running both the combustion and circulating fans. Technicians have put two new honeywell boards in it. the fans are still running. all circuits and loops and voltages have been checked, but the unit is still running the combustion and circulating fans. the combustion fans is what pulls the heat through the heat chambers to the outside.

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Ever so often the exhaust fan comes on and then the burners ignite and burn for a minute or so and then go out. The exhaust fan continues to run sometimes about 4 minutes or longer then the indoor circulating fan comes on with heat. WHAT IS THE PROBLEM----goodman gaspack.

Posted on Mar 23, 2010

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Then you need toi have them check the fan high limit that is mounted in the blower compartment. if it's closed then the blower fan and the conmbustion air fan will run together.

Posted on Feb 04, 2009

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Combustion fan purges the heat exchanger. A pressure switch verifies combustion air fan is running. Usually a 30-45 second purge before the hot surface ignitor glows, or the spark ignition starts.

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Dec 16, 2009 | Goodman GMS90703BXA Heater

1 Answer

Combustion fan and circulating fan running and no heat


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Older model Goodman gas package unit


It sounds like it is still receiving a "call" for heat from the thermostat. First check that the thermostat is set for gas heat and not electric.(There may be a jumper or dip switch on the back). Read the directions with the thermostat.

Secondly, Verify that the wiring at the thermostat is correct. (R- to red, W to white, G to green etc.)

Third, If the first two do not fix the problem, then there is definitely a problem in the thermostat wire between the furnace and the thermostat. (usually the "R" and "W" wires will be crossed or shorted to the sheet metal around the furnace. You may just have to replace the entire wire. Best of luck!

Jan 28, 2009 | Goodman GMS90703BXA Heater

1 Answer

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Jan 10, 2009 | Goodman GMS90703BXA Heater

1 Answer

6 blinks


sounds to me like i wish i could find out if this is new install or if the electric has been changed recently,,,sounds like reversed polarity on the plug,,,which means the white and black wires need to be swapped. If there has not been change recently than u need to see the other post i made on goodman about the combustion fan motors and there types and fixes. But almost certain that is reversed polarity. good luck

Oct 23, 2008 | Goodman GMS90703BXA Heater

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