Amana Gas Furnace: GULA Re: Lockout Codes # of Flashes Description On Replace Control 1 Ignition lockout (3 failed tries) - 1hr Auto Reset 2 Pressure switch stuck closed 3 Pressure switch stuck open 4 Primary or Aux Limit switch open 5 ...

Amana Gas Furnace: GULA Re: Code 1 / Won't Ignite Code 1 = 3 Failed Ignition Attempts ► Be aware that the furnace condensate pressure switch (listed as "Front Cover Pressure Switch") breaks power to the gas valve and will cause a Fault Code 1 (Does not cause a Code 3). Qty Possible...

Amana Gas Furnace: GULA 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...

Amana Gas Furnace: GULA Re: Flashing Code 4 Code 4 = Main limit switch (auto-reset) has opened its normally closed contacts, or the Blower Auxiliary Limit (manual-reset) has tripped. The control will operate the supply air blower and inducer while the open limit condition exists. Qty...