Noritz Error Code 11: Ignition Failure
Warning: Your Noritz water heater is experiencing an ignition failure, which may cause a lack of hot water. It's safe to use, but needs professional attention.
How to Fix Noritz Code 11
- Step 1: Turn off the water heater at the power switch to prevent further attempts at ignition.
- Step 2: Do not attempt to open the water heater or perform any repairs yourself.
- Step 3: Contact a licensed HVAC technician to diagnose and repair the issue.
How to Reset Noritz Code 11
- 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 11 mean?
The Noritz 11 error code indicates that your water heater's ignition system is not functioning properly. This could be due to a faulty ignition control board, a bad spark igniter, or a problem with the gas valve. The system is designed to protect itself from potential hazards, so it's safe to use, but you'll need to call a professional to fix the issue.
Affected Models
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Ignition Control Board | 300-2000 | — |
| Spark Igniter | 300-2010 | — |
| Gas Valve | 300-2020 | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 10 | Flame Failure | Warning |
| 14 | Thermal Fuse Failure | 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 |
| 51 | Fan Motor Failure | Warning |
| 61 | Fan Motor Failure | Warning |