94
Noritz
Flame Detection Abnormality During Combustion
Boiler shows error 94 and shuts down during operation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Unstable flame, Dirty burner, Incorrect gas pressure, Faulty flame rod or wiring
How to Fix / Troubleshooting
Safety: Turn OFF gas and power. Ensure adequate ventilation.
- 1. Clean flame rod and burner: Remove and clean the flame rod and gently brush the burner surface to remove debris.
- 2. Check ground and wiring: Verify that the boiler is properly grounded and that flame rod wiring is intact and firmly connected.
- 3. Inspect venting: Ensure intake and exhaust are clear to prevent combustion instability.
- 4. Professional combustion check: If error 94 continues, a technician must verify gas pressure, combustion quality, and possibly replace the flame rod or adjust the gas valve.
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Repair Difficulty
Professional Required
5/5
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