Honeywell HVAC Error Codes
Model Families
| Family | Name | Fuel | Models |
|---|---|---|---|
| FocusPRO | — | — | 1 |
| Home | — | — | 1 |
| Lyric | — | — | 1 |
| Prestige | — | — | 1 |
| Pro Series | — | — | 1 |
| RTH | — | — | 1 |
| RedLINK | — | — | 1 |
| T-Series | — | — | 1 |
| VisionPRO | — | — | 1 |
| Zone Control | — | — | 1 |
Error Codes
| Code | Description | Severity |
|---|---|---|
| E1 | Communication Error | Warning |
| E2 | Sensor Fault | Warning |
| E3 | EEPROM Error | Warning |
| E350 | Low Battery | Info |
| E351 | Equipment Fault | Warning |
| E352 | Sensor Open | Warning |
| E353 | Sensor Short | Warning |
| E4 | Short Cycle Protection | Warning |
| E5 | Wiring Error | Warning |