Noritz Error Code 11: Ignition Failure

How to Fix Noritz Code 11

1. Step 1: Turn off the water heater at the power switch to prevent further attempts at ignition.
2. Step 2: Do not attempt to open the water heater or perform any repairs yourself.
3. Step 3: Contact a licensed HVAC technician to diagnose and repair the issue.

How to Reset Noritz Code 11

1. Turn off the unit using the power button on the front panel.
2. Turn off the gas supply valve.
3. Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
4. Restore power at the breaker, then open the gas valve.
5. Turn the unit back on. If the error returns, the underlying issue needs repair.

Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.

What Does Noritz Error Code 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.

Common Causes

• Faulty ignition control board
• Bad spark igniter
• Problem with the gas valve
• Clogged or dirty flame sensor

Diagnostic Steps

Replacement Parts

Related Codes on Same Models

Other codes that affect the same Noritz model families as 11.