Amana Gas Furnaces: GCAC Re: Diagnostic Codes / Fault Codes The original control module in these furnaces is a White-Rodgers 50A50 controller. Integrated Furnace Control Code Description On Flame sensed with no call for heat 1 Lockout due to failed ignition ...

Amana Gas Furnace: GCCA/GUCA 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...