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 |
| 2 | Pressure switch stuck closed |
| 3 | Pressure switch stuck open |
| 4 | Open limit |
| 5 | Missing jumper wire |
| 6 | Reversed 115V or 24V polarity |
| 7 | Low flame signal |
| 8 | Problem with igniter circuit |