Amana Gas Furnaces: GUC, GUD, GUI, GUX Re: Lockout Codes The original control module in these furnaces is a White-Rodgers 50A50 controller. 50A50-206 Integrated Furnace Control Code Description On Replace control 1 Lockout due to failed ignition 2 ...

Amana Gas Furnace: GUIC/GCIC Re: Flashing Code 1 If a flame was not sensed during the first 7 seconds after the gas valve was energized, the control turns off the gas. The control will make 3 tries before it determines that it cannot establish measureable combustion and enters a lockout...

Amana Gas Furnace: GUIC/GCIC 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. ...

Amana Gas Furnace: GUIC/GCIC 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...