Safety: Isolate the appliance from mains power before removing panels.

Confirm fan not running: Set the oven to a fan-assisted mode and listen. If there is no fan noise and no air movement, proceed with checks.
Access fan motor: Remove the rear panel inside the oven to expose the fan blade. Check if the blade spins freely by hand. Stiffness or grinding indicates motor failure.
Check for obstructions: Ensure no loose screws or debris are jamming the fan blade.
Test motor windings: From the rear of the cooker, access the fan motor terminals. Disconnect and measure resistance. An open circuit indicates a failed motor.
Inspect wiring and capacitor: Some motors use a start capacitor mounted nearby. Check for bulging or leaking. Replace if defective. Also inspect wiring for heat damage.
Replace fan motor: If seized or open circuit, fit a Belling-compatible fan motor and refit the fan blade securely.

Oven fan does not run in fan modes; oven may overheat locally or cook unevenly.

Possible Causes