Air fryer heats but fan does not run; food burns on top and cooks unevenly.

Safety first: Unplug the unit and allow it to cool. The heater area can remain hot for some time.

• Check fan movement: Gently spin the fan blades from inside the cavity. If stiff or jammed, inspect for debris or a bent shroud.
• Inspect motor: Access the fan motor from the rear/top. Check for oil or grease contamination and burnt smell.
• Test motor: Measure resistance across the motor leads. An open circuit or very high resistance indicates a failed motor.
• Replace motor: Install a new Ultima Cosa convection fan motor and ensure the blade is secure and centered.
• Control board: If the motor is good but never receives power, the fan driver on the main PCB may be faulty and the board should be replaced.