All Error Codes
High Medium Low
| Code | Description | Severity | Quick Action |
|---|---|---|---|
| 11 | Rheem Code 11 - No Ignition | High | Shut down & call tech |
| 12 | Rheem Code 12 - Flame Failure | High | Shut down & call tech |
| 13 | Rheem Code 13 - Incomplete Combustion | High | Shut down & call tech |
| 10 | Rheem Code 10 - Air Supply or Exhaust Blockage | Medium | Check venting |
| 29 | Rheem Code 29 - Fan Motor Abnormality | Medium | Clean air filter |
| A001 | Ignition Failure | Medium | Call tech support |
| A003 | Abnormal Ignition | Medium | Call tech support |
| A004 | False Flame Detection | Medium | Check gas & reset |
| A008 | Exhaust Temperature High | Medium | Check venting |
| A011 | No Flame Detected | Medium | Check gas & reset |
| A021 | Over-Temperature | Medium | Call tech support |
| A031 | Inlet Thermistor Open/Short | Medium | Call tech support |
| A041 | Outlet Thermistor Open/Short | Medium | Call tech support |
| A043 | Water Level Error | Medium | Call tech support |
| A051 | Fan Motor Abnormality | Medium | Clean air filter |
| A052 | Fan Motor Speed Error | Medium | Clean air filter |
| A053 | Fan Motor Open Circuit | Medium | Clean air filter |
| A054 | Fan Motor Overcurrent | Medium | Clean air filter |
| A055 | Fan Motor Locked | Medium | Clean air filter |
| A061 | Fan Speed Error | Medium | Clean air filter |
| A071 | Gas Valve Circuit Error | Medium | Call tech support |
| A081 | Water Flow Control Error | Medium | Call tech support |
| A091 | PCB Communication Error | Medium | Call tech support |
| A093 | PCB Data Error | Medium | Call tech support |
| A095 | DIP Switch Error | Medium | Call tech support |
| A099 | PCB Failure | Medium | Call tech support |
| A101 | Condensate Blockage | Medium | Call tech support |
| A121 | Bypass Valve Error | Medium | Call tech support |
| P1 | Rheem Code P1 - Defrost Error | Medium | Call tech support |