Noritz Fan Speed / Combustion Feedback Fault

Error code 92 displayed; unit may not operate.

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

Incorrect fan speed relative to combustion, Faulty fan speed sensor, PCB control error, Blocked vent causing abnormal fan load

Safety first: Turn OFF power and gas.

Steps to check and correct:

Inspect venting: Confirm vent and intake are free of obstructions and within Noritz length and configuration limits.
Check fan assembly: Inspect the combustion fan for debris and ensure it spins freely.
Inspect wiring: Verify fan motor and speed sensor wiring are intact and connected.
Professional diagnosis: If error 92 persists, a technician should test fan speed feedback and PCB operation and replace components as needed.

Hard 4/5

Combustion Fan Motor

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