Noritz Flame Loss During Operation / Combustion Abnormality

Error code 94 displayed; unit may shut down during operation.

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.

Possible Causes

Sudden drop in gas pressure, Wind-induced vent pressure issues, Dirty flame rod or burner, Faulty gas valve or PCB control

Safety first: Turn OFF power and gas if you suspect gas supply issues.

Steps to check and correct:

Check gas supply stability: If other gas appliances also fluctuate, contact your gas supplier.
Inspect vent termination: Ensure vent termination is installed per Noritz wind-resistance guidelines and not subject to strong direct winds.
Clean flame rod and burner: Follow steps from errors 12 and 72 to clean flame rod and burner.
Professional diagnosis: If error 94 persists, a technician should test gas valve operation and PCB control.

Hard 4/5

Gas Valve Assembly

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