The F7 error code on a Kenmore over-the-range (OTR) microwave indicates the ventilation fan motor has failed or is drawing abnormal current. Over-the-range microwaves use a fan to vent cooking fumes and cool internal components.
Causes
- Failed fan motor winding
- Fan blade seized from grease buildup
- Wiring fault to the fan motor
- Failed fan speed relay on the control board
What To Do
- Clean the grease filter (typically on the underside of the microwave) — extremely dirty filters restrict airflow and can cause fan motor overload.
- If the fan is audibly struggling or not running at all, the fan motor requires professional replacement.