Safety first: Unplug the appliance before removing any covers.

1. Listen for fan operation: Start a short cooking cycle. If you do not hear the usual airflow noise, the cooling fan may not be running.
2. Check vents: Ensure external vents are not blocked. Heavy blockage can overload the fan.
3. Access fan motor: Remove the outer cover. Locate the cooling fan (usually near the magnetron and high-voltage transformer). Inspect the blades for grease buildup or foreign objects.
4. Spin test: With power disconnected, gently spin the fan blades by hand. They should move freely. If stiff or seized, the motor likely needs replacement.
5. Electrical test: Check the fan motor for continuity with a multimeter. An open circuit indicates a failed motor. Inspect wiring and connectors for heat damage.
6. Replace motor if needed: Fit a new Beko-compatible cooling fan motor, ensuring correct orientation and secure mounting.

Warning: Do not operate the microwave with the cooling fan disabled; this can cause overheating and further damage.

Microwave shows E08; interior light and fan may run but cooking does not start.

Possible Causes