Trending — Cooling Season
| Code | Brand | Description | Severity |
|---|---|---|---|
| 11 | Rinnai | No Ignition | Warning |
| 10 | Rinnai | Air Supply/Exhaust Blockage | Warning |
| 12 | Rinnai | Flame Failure | Warning |
| E110 | Navien | Exhaust Blocked | Warning |
| 11 | Noritz | Ignition Failure | Warning |
| E003 | Navien | Abnormal Ignition | Warning |
| E438 | Navien | Navien Error Code E438 - Abnormal Operation | Warning |
| 61 | Rinnai | Fan Motor Failure | Warning |