Rinnai Water Heater Error Codes & Fixes
Rinnai Water Heater / Boiler: 4 error codes with meaning, severity, likely causes and repair cost estimates.
4Codes
3.0Average severity
25%High or critical
0%DIY-friendly
Severity distribution
Most viewed
10
Rinnai · Water Heater / Boiler
The Rinnai can't breathe: a frozen condensate line, a blocked vent terminal or a dirty air…
High
11
Rinnai · Water Heater / Boiler
The Rinnai tried to light but never proved a flame – gas off, air in the line or low gas…
Moderate
12
Rinnai · Water Heater / Boiler
The Rinnai lit but then lost its flame or stopped sensing it – usually gas supply, venting…
Moderate
LC
Rinnai · Water Heater / Boiler
Mineral scale is coating the heat exchanger – the Rinnai needs a descaling flush; the digit…
Low
All codes (3)
10
Rinnai · Water Heater / Boiler
The Rinnai can't breathe: a frozen condensate line, a blocked vent terminal or a dirty air…
High
11
Rinnai · Water Heater / Boiler
The Rinnai tried to light but never proved a flame – gas off, air in the line or low gas…
Moderate
12
Rinnai · Water Heater / Boiler
The Rinnai lit but then lost its flame or stopped sensing it – usually gas supply, venting…
Moderate