Rinnai 12: what it means and when to call a pro · United States
Severity: Stop and call a proRinnai water heater error 12. The flame went out during operation, or the flame sensor signal is faulty.
Smell gas? Leave the building and call the gas emergency number: 911
Meaning
The flame went out during operation, or the flame sensor signal is faulty.
Severity
Stop and call a pro
Stop. Switch it off and call a pro
Steps are not shown for this code because no qualified person has reviewed them yet. What is safe: switch it off, follow the Do not list and call a pro.
Do not
- Do not open the casing or unplug parts inside. Rinnai's guide treats this as work for a qualified technician.
- Do not keep restarting the heater if code 12 comes back.
Source
Troubleshooting Tankless Water Heater Diagnostic Codes, Rinnai
The repair: Water heater repair
Prices for repairs in United States are in USD.
Other Rinnai codes
- Rinnai 16 The water heater overheated and the safety thermostat cut it out.
- Rinnai 32 The hot water temperature sensor is faulty or disconnected.
- Rinnai 61 The fan is faulty or is not reaching the correct speed.
- Rinnai 72 The flame went out during operation, or the flame sensor signal is faulty.
- Rinnai 10 The flue gas temperature is too high, or the flue or air supply is faulty or blocked.
Brands in our catalog for water heater: Navien, Rinnai. The same code on another brand is not in the catalog yet, and we do not guess what it means.