Trane S9X2 HVAC System Error Codes
S9X2-048.
Fuel: natural gas / propane. 12 error codes documented.
Severity breakdown:
12 warning
Error Codes
| Code | Description | Severity |
| 2 | System Lockout | Warning |
| 3 | Pressure Switch Error | Warning |
| 4 | Open Limit Switch | Warning |
| 5 | Flame Sensed With Gas Off | Warning |
| 6 | Polarity/Grounding Error | Warning |
| 7 | Gas Valve Circuit Error | Warning |
| 8 | Low Flame Signal | Warning |
| 9 | Igniter Problem | Warning |
| FAST-FLASH | Active Call for Heat | Warning |
| SLOW-FLASH | Normal Operation (Standby) | Warning |
| STEADY-OFF | No Power | Warning |
| STEADY-ON | Control Board Problem | Warning |
Cross-Reference: Shared Codes with Other Trane Models
| Model | Type | Shared Codes | Unique to That Model |
| XR | — | 12 / 12 | — |
| XV | — | 12 / 12 | — |
| NPE | Tankless Water Heater | 12 / 12 | — |
| XB | — | 12 / 12 | — |
| S9V2 | — | 12 / 12 | — |
| S9X | — | 12 / 12 | — |
| N | — | 12 / 12 | — |
| TR | — | 12 / 12 | — |
| NCB | Combi-Boiler | 12 / 12 | — |
| XB90 | — | 12 / 12 | — |
| XB80 | — | 12 / 12 | — |
| XB70 | — | 12 / 12 | — |
| XB60 | — | 12 / 12 | — |
| XE | — | 12 / 12 | — |
| XR95 | — | 12 / 12 | — |
| XR80 | — | 12 / 12 | — |
| XR90 | — | 12 / 12 | — |
| S9V | — | 12 / 12 | — |
| NXE | — | 12 / 12 | — |
| Z | — | 12 / 12 | — |