Rinnai · Fault codes
Rinnai error codes and status lights
Identical code numbers and flash counts mean different things on different brands and controls, so every entry is tied to the documented series, control platform and manual version. A code is never a diagnosis.
If you smell gas
- Stop what you are doing. Do not use phones, switches, matches or anything that can spark inside.
- Go outside and leave the door open behind you.
- Call the FortisBC 24-hour emergency line at 1-800-663-9911 or dial 911.
Only after that, call CANRO about the water heater. Official guidance: FortisBC gas leaks and odour.
Rinnai SENSEI RU residential condensing tankless (RU130/160/180/199, indoor and outdoor)
Code 10: Air supply or exhaust blockage, or full condensate trap
Rinnai's RU series installation and operation manual lists diagnostic code 10 as "Air Supply or Exhaust Blockage / Condensate Trap is Full".…
Lockout
Code 12: No flame (burner lit, then flame lost or not sensed)
Rinnai's RU series installation and operation manual lists diagnostic code 12 as "No Flame". The manual's checks are: confirm the gas is tur…
Lockout
Code 14: Heat exchanger overheat
Rinnai's RU series installation and operation manual lists diagnostic code 14 as "Heat Exchanger Overheat". The manual's checks are: measure…
Safety
Code 16: High outgoing temperature (safety shutdown)
Rinnai's RU series installation and operation manual lists diagnostic code 16 as "High Outgoing Temperature (safety shutdown because water h…
Safety
Code 19: Electrical grounding fault
Rinnai's RU series installation and operation manual lists diagnostic code 19 as "Electrical Grounding". The manual's single check is to che…
Lockout
Code 11: No ignition (heater not turning on)
Rinnai's installation and operation manual for the RU series lists diagnostic code 11 as "No Ignition (Heater Not Turning On)". The manual's…
Lockout
Code 25: Condensate pump fault (accessory)
Rinnai's RU series installation and operation manual lists diagnostic code 25 as "Condensate Pump (Accessory)". The manual's checks are: con…
Lockout
Code 52: Gas valve fault
Rinnai's RU series installation and operation manual lists diagnostic code 52 as "Gas Valve". The manual's checks are: check the flame rod a…
Lockout
Code 61: Combustion fan fault
Rinnai's RU series installation and operation manual lists diagnostic code 61 as "Combustion Fan". The manual's checks are: check the motor …
Lockout
Code 63: Recirculation low flow
Rinnai's RU series installation and operation manual lists diagnostic code 63 as "Recirculation Low Flow". The manual's checks are: ensure t…
Details
Code 65: Water flow control fault (bath-fill valve)
Rinnai's RU series installation and operation manual lists diagnostic code 65 as "Water Flow Control". The manual's checks are: measure the …
Safety
Code 71: Solenoid valve circuit fault
Rinnai's RU series installation and operation manual lists diagnostic code 71 as "Solenoid Valve Circuit". The manual's checks are: ensure t…
Lockout
Code 72: Flame rod fault
Rinnai's RU series installation and operation manual lists diagnostic code 72 as "Flame Rod". The manual's checks are: check the flame rod a…
Lockout
Code FF: Maintenance indicator (service history marker)
Rinnai's RU series installation and operation manual lists FF as a "Maintenance Indicator": a placeholder in the diagnostic code history ind…
Details
Code SS: Service Soon (flush the heat exchanger)
Rinnai's RU series installation and operation manual lists SS (Service Soon) as a time-based service indicator set during installation. SS i…
Details
Talk to a water heater technician
Describe what the water heater is doing and get a straight answer about the next step.
On-site service in Metro Vancouver, BC. Call to check availability.