Noritz Error 11: Ignition Failure
The unit attempted to fire but the burner failed to light and no flame was sensed within the ignition trial. The control locks out to prevent raw gas from building up. This is one of the most common Noritz no-heat / no-hot-water faults. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The unit attempted to fire but the burner failed to light and no flame was sensed within the ignition trial. The control locks out to prevent raw gas from building up. This is one of the most common Noritz no-heat / no-hot-water faults.
Noritz fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Noritz error 11
- Gas supply off, low gas pressure, or air in a new gas line
- Failed or fouled hot surface igniter / ignition electrode
- Flame sensor (flame rod) dirty or out of position so flame is never confirmed
- Faulty gas valve or gas valve circuit
- Blocked or restricted intake/exhaust venting
What you can safely check
- Confirm the gas supply valve to the unit is open and that other gas appliances in the home still work
- Check that the room thermostat is calling for heat and set above room temperature
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
Error 11 usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Noritz repair.
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Parts often behind Noritz error 11
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Noritz Error 11 Repair Across Metro Vancouver
Related Noritz Ignition & Flame Codes
Frequently Asked Questions
Fix Noritz Error 11 Today
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