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- Flue or venting fault: tankless water heater / continuous flow hot water system codes by brand
Flue or venting fault: tankless water heater / continuous flow hot water system codes by brand
Combustion air intake or exhaust is blocked, restricted or not proven.
| Brand | Code | Meaning | What you can do |
|---|---|---|---|
| Rinnai | 10 | Air intake, flue or condensate blockage | Safe checks first, then a pro |
| Rinnai | 13 | Combustion fault | Safe checks first, then a pro |
| Navien | E110 | Abnormal air pressure (blocked vent or intake filter) | Safe checks first, then a pro |
| Navien | E127 | Air volume sensor fault | Call a pro |
| Navien | E157 | Air volume control fault | Call a pro |
| Navien | E762 | Vent pipe not fully inserted | Call a pro |