Furnace displays F32, fan speed error, unit may not start or may shut down

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

Worn fan bearings causing drag,Obstructed fan wheel,Incorrect fan speed feedback,Defective fan motor

Safety first: Isolate power and gas. Wait for the fan to stop completely before touching.

Clean fan: Remove dust and debris from the fan wheel and housing. Ensure nothing is rubbing against the wheel.
Check rotation: Manually spin the fan wheel to feel for stiffness or grinding. Replace the fan if bearings are worn.
Verify connections: Ensure the fan connector is fully seated on the PCB and that no pins are bent.
Replace fan: If the fan cannot reach the required speed or feedback is incorrect, install a new Saunier Duval fan assembly.

Hard 4/5

Flue Fan Assembly

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