Goodman GSX18 HVAC System Error Codes
GSX180361.
Fuel: natural gas / propane. 16 error codes documented.
Severity breakdown:
2 critical , 13 warning , 1 informational
Error Codes
| Code | Description | Severity |
| F01 | Goodman Code F01 - Ignition Lockout | Critical |
| F02 | Goodman Code F02 - Rollout Switch Open | Critical |
| 1 | System Lockout | Warning |
| 2 | Pressure Switch Stuck Closed | Warning |
| 3 | Pressure Switch Stuck Open | Warning |
| 4 | Open High Limit Switch | Warning |
| 5 | Flame Sensed With Gas Valve Off | Warning |
| 6 | Open Rollout Switch | Warning |
| 7 | Low Flame Signal | Warning |
| 8 | Ignitor Error | Warning |
| 9H | Goodman Code 9H - Soft Lockout | Warning |
| CONTINUOUS | Reversed Polarity | Warning |
| EAF | Goodman Code EAF - Airflow Error | Warning |
| EE0 | Goodman Code EE0 - Communication Error | Warning |
| F04 | Goodman Code F04 - High Limit Switch Open | Warning |
| STEADY-ON | Normal Operation | Info |
Cross-Reference: Shared Codes with Other Goodman Models