Safety first: Disconnect power and ensure the oven is cool before working near the fan.

Check fan movement: Remove the oven's rear internal panel (inside the cavity) to expose the fan blade. Try spinning it by hand; it should rotate freely.
Clean buildup: Remove heavy grease or carbon deposits from the fan blades and the surrounding area.
Access motor terminals: From the rear of the appliance, locate the convection fan motor and inspect its wiring for heat damage.
Test motor: Disconnect the motor and measure the resistance across its terminals. An open circuit indicates a failed motor. If safe and qualified, you can bench-test the motor with the correct mains voltage.
Replace motor: Remove mounting screws, withdraw the motor, and install a new DeLonghi convection fan motor. Ensure the fan blade is correctly oriented and secured.
Control board check: If the motor is functional but never receives power, the fan relay or control board may be faulty and require professional replacement.

Oven display shows F19, and the fan-forced mode does not operate; the fan does not spin.

Possible Causes