Rheem R801T HVAC System Error Codes
R801T0753MSC.
Fuel: natural gas / propane. 29 error codes documented.
Severity breakdown:
3 critical , 26 warning
Error Codes
| Code | Description | Severity |
| 11 | Rheem Code 11 - No Ignition | Critical |
| 12 | Rheem Code 12 - Flame Failure | Critical |
| 13 | Rheem Code 13 - Incomplete Combustion | Critical |
| 10 | Rheem Code 10 - Air Supply or Exhaust Blockage | Warning |
| 29 | Rheem Code 29 - Fan Motor Abnormality | Warning |
| A001 | Ignition Failure | Warning |
| A003 | Abnormal Ignition | Warning |
| A004 | False Flame Detection | Warning |
| A008 | Exhaust Temperature High | Warning |
| A011 | No Flame Detected | Warning |
| A021 | Over-Temperature | Warning |
| A031 | Inlet Thermistor Open/Short | Warning |
| A041 | Outlet Thermistor Open/Short | Warning |
| A043 | Water Level Error | Warning |
| A051 | Fan Motor Abnormality | Warning |
| A052 | Fan Motor Speed Error | Warning |
| A053 | Fan Motor Open Circuit | Warning |
| A054 | Fan Motor Overcurrent | Warning |
| A055 | Fan Motor Locked | Warning |
| A061 | Fan Speed Error | Warning |
| A071 | Gas Valve Circuit Error | Warning |
| A081 | Water Flow Control Error | Warning |
| A091 | PCB Communication Error | Warning |
| A093 | PCB Data Error | Warning |
| A095 | DIP Switch Error | Warning |
| A099 | PCB Failure | Warning |
| A101 | Condensate Blockage | Warning |
| A121 | Bypass Valve Error | Warning |
| P1 | Rheem Code P1 - Defrost Error | Warning |
Cross-Reference: Shared Codes with Other Rheem Models