Water heaters
Rinnai error codes
Rinnai tankless water heater diagnostic codes, from Rinnai's own diagnostic code manual. Homeowner checks only; the manual's internal steps are for trained pros.
Rinnai tankless water heater codes (18)
- 10Air supply or exhaust blockage, or condensate trap full
- 11No ignition
- 12Flame failure
- 14Thermal fuse or overheat sensor
- 16High outgoing water temperature
- 25Condensate pump error or drain clogged
- 32Outgoing water temperature thermistor fault
- 33Heat exchanger thermistor
- 52Gas valve
- 61Combustion fan motor
- 63Recirculation low flow
- 65Water flow control device
- 70PC board fault
- 71Gas solenoid valve
- 72Flame rod fault
- 79Water leakage detected
- LCScale build-up, flush needed
- FEFlammable vapors detected
No code matches. Try the AI helper.