Trane Error Codes
Every Trane error code we have catalogued, with what it means on site — 30 codes in total. In R-Pro, tap any code to get the meaning, likely causes and inspection steps, even with no signal in the plant room.
30 codes
| Code | What it means |
|---|---|
| E1 | High pressure protection |
| E2 | Anti-freezing protection |
| E3 | Low pressure protection |
| E4 | Discharge high-temp protection |
| E5 | Over-current protection |
| E6 | Indoor/outdoor communication problem |
| E7 | Running mode conflict |
| E8 | Overload prevention limit |
| E9 | Indoor water overflow error |
| EE | EEPROM logic error |
| F1 | Indoor ambient temp sensor fault |
| F2 | Indoor pipe temp sensor fault |
| F3 | Outdoor ambient sensor fault |
| F4 | Discharge thermistor fault |
| F5 | Compressor top temp sensor fault |
| H1 | Defrosting mode |
| H3 | Compressor overload protection |
| H4 | System overload protection |
| H5 | IPM protection |
| H6 | Indoor fan motor stalled / no feedback |
| H7 | Compressor desynchronization |
| HC | PFC error |
| L3 | Outdoor fan 1 motor fault |
| LC | Compressor startup failure |
| LD | Phase reversal / phase loss |
| LE | Compressor stalling |
| LP | Indoor/outdoor unit mismatch |
| PH | DC bus over-voltage |
| PL | DC bus under-voltage |
| U7 | 4-way reversing valve abnormality |
Official Trane source / manual ↗
Look up any error code — offline — in R-Pro.
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