Noritz Fan Speed Control Error

Boiler shows error 92 and fails to modulate correctly.

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

Defective fan motor, Control board PWM output fault, Obstructed fan or venting

Safety: Turn OFF power before working on the fan or venting.

1. Check venting: Ensure intake and exhaust are not blocked or restricted, which can cause abnormal fan loading.
2. Inspect fan wheel: With power OFF, inspect the fan wheel for debris or damage that could prevent proper speed.
3. Verify wiring: Confirm that the fan motor harness is intact and firmly connected.
4. Professional diagnosis: If error 92 persists, a technician should test fan speed control signals and replace the fan or control board.

Hard 4/5

Combustion Fan Motor Assembly

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