HVACopediaKeepRite heat pump error codes
19 codes with causes and test steps.
| Code | Meaning | Severity |
|---|---|---|
| 16 | Lost communication with wall control | Medium |
| 25 | Model plug missing or invalid | High |
| 31 | High pressure switch open | High |
| 32 | Low pressure switch open | High |
| 45 | Outdoor control board failure | High |
| 46 | Brown-out (low voltage) | Medium |
| 47 | No 230 V at the unit | High |
| 53 | Outdoor air temperature sensor fault | Medium |
| 55 | Outdoor coil sensor fault | Medium |
| 56 | Air and coil sensors disagree | Medium |
| 71 | Low stage thermal cutout | High |
| 72 | Compressor thermal cutout (two-stage: high stage) | High |
| 73 | Contactor stuck closed | High |
| 74 | No 230 V at compressor | High |
| 81 | Low stage thermal lockout | High |
| 82 | Thermal lockout (two-stage: high stage) | High |
| 83 | Low pressure lockout | High |
| 84 | High pressure lockout | High |
| Phase monitor LED flashing | 3-phase monitor - phase reversal | High |
Models covered
*CH624*CH636*CH648*CH660*CH924*CH936*CH948*CH960*SH4*SH5*SH6N4H4NXH5R4H4R4H449WCH4
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.