Goodman Gas Furnace - GMPN Re: Lockout Codes # of Flashes Description 1 Ignition failure (3 tries) 2 Pressure switch stuck closed 3 Pressure switch stuck open 4 Limit switch open or Blown low voltage fuse 5 Flame present with gas valve off ...

Goodman Gas Furnace: GMPN Re: Code 1 / Won't Ignite Code 1 = 3 Failed Ignition Attempts Qty Possible Causes: 3 Tripped or Bad Rollout (Bad Heat Exchanger) 1 Dirty Flame Sensor 4 Bad Ignitor 1 Bad Control Board Tripped or Bad Stack Over-Temp...

Goodman Gas Furnace: GMPN Re: Flashing Code 2 Code 2 = Pressure switch stuck closed The furnace pressure switch should only close when the inducer fan output is energized. If control board is not energizing the inducer fan output and the switch is closed, the board will flash a code 2. ► A...

Goodman Gas Furnace: GMP Re: Flashing Code 3 If, after the vent blower is energized, the pressure switch does not close, the control will keep the blower on and wait for the switch to close. The diagnostic code for this problem is 3 short flashes followed by a pause. ► The diagnostic code will...

Make: Goodman Model or Series: GMPN120-5 Type: 90% Furnace Problem Description: No power to thermostat Observed Symptoms: Control board flashing Code 4 (Limit switch open) No 24VAC at "R" terminal Solution: Replaced furnace control board. ICM280 Additional Information: Had...

Goodman Gas Furnace: GMP Re: Furnace Cycles Off and On The gas furnace occasionally kicks off and then re-fires. Qty Possible Causes: Pressure Switch Fault Primary Limit Switch Open 1 Low Flame Signal Bad Control Board Thermostat Issue ...

Goodman Gas Furnace: GMP Re: Multiple Attempts to Fire The gas furnace burners ignite and shut-off several times before eventually burning normally. Qty Possible Causes: Low Flame Signal Pressure Switch Fault Bad Control Board Thermostat Issue ...

Goodman Gas Furnace: GMP Re: Flashing Code 4 (Assuming original control board) If the limit control opens, the burners will be de-energized and the air circulation and vent blower will be turned on until the limit closes. The diagnostic light code for this is four short flashes followed by a...