York HVAC Error Codes
Model Families
| Family | Name | Fuel | Models |
|---|---|---|---|
| AHE | — | — | 1 |
| LX Series | — | — | 1 |
| Packaged | — | — | 1 |
| TM8Y | — | — | 1 |
| TM9T | — | — | 1 |
| TM9V | — | — | 1 |
| YCS | — | — | 1 |
| YXT | — | — | 1 |
| YXV | — | — | 1 |
| YZB | — | — | 1 |
| YZT | — | — | 1 |
| YZV | — | — | 1 |
Error Codes
| Code | Description | Severity |
|---|---|---|
| A4 | Improper Thermostat Wiring | Warning |
| AF | Low Flame Current | Critical |
| R1 | Flame Without Call | Critical |
| R2 | Pressure Switch Stuck Closed | Warning |
| R3 | Pressure Switch Stuck Open | Warning |
| R4 | High Limit Switch Open | Warning |
| R5 | Rollout Switch Open | Critical |
| R6 | Gas Valve Failure | Critical |
| R7 | Ignition Lockout | Critical |
| R9 | Reversed Polarity | Critical |