How to Fix / Troubleshooting

Safety: Unplug the microwave and allow it to cool before inspection.

Steps to address non-running fan:

1. Confirm symptom: During cooking, you should hear airflow from the vents. If silent and the unit feels hot, the fan is likely not running.
2. Access fan: Remove the outer cabinet and locate the cooling fan near the magnetron.
3. Inspect blades: Check for debris or insulation blocking the fan. Remove obstructions and ensure the blades spin freely.
4. Test motor: Disconnect the fan motor and test for continuity. Replace the motor if open or if the shaft is stiff.
5. Check wiring and relay: Ensure the fan wiring is secure. If the motor is good but never receives power, the control board relay may be faulty and require replacement.

Microwave runs but the cooling fan does not operate; exterior becomes very hot to the touch.

Possible Causes