Noritz Error Code 12: Flame Loss
Warning: Your Noritz water heater is experiencing a flame loss issue, which could lead to system damage if not addressed promptly.
How to Fix Noritz Code 12
- Step 1: Check your gas supply. Ensure that your gas is turned on and that there are no leaks.
- Step 2: Inspect the area around your water heater for any signs of damage or obstruction that could be preventing the burner from igniting.
- Step 3: If you're comfortable doing so, you can try resetting the water heater. Otherwise, contact a professional HVAC technician.
How to Reset Noritz Code 12
- Turn off the unit using the power button on the front panel.
- Turn off the gas supply valve.
- Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
- Restore power at the breaker, then open the gas valve.
- Turn the unit back on. If the error returns, the underlying issue needs repair.
What does 12 mean?
Error code 12 on your Noritz water heater indicates a flame loss issue. This means that the burner is not igniting or maintaining a flame, which could be due to a few reasons. The most common causes are a faulty igniter, a problem with the gas valve, or an issue with the thermocouple. It's important to note that this error can also be caused by a lack of gas supply or a clogged burner.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Igniter | Noritz 8701010000 | — |
| Gas Valve | Noritz 8701020000 | — |
| Thermocouple | Noritz 8701030000 | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 10 | Flame Failure | Warning |
| 11 | Ignition Failure | Warning |
| 14 | Thermal Fuse Failure | Warning |
| 16 | Over-Temperature | Warning |
| 29 | Condensate Drain Issue | Warning |
| 31 | Inlet Thermistor Failure | Warning |
| 32 | Outlet Thermistor Failure | Warning |
| 33 | Heat Exchanger Thermistor Failure | Warning |
| 43 | Water Level/Neutralizer Issue | Warning |
| 45 | Water Leak Detected | Warning |