Microwave displays E8 and stops heating, fan may continue to run.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety: Unplug the microwave before removing the cabinet.
Ventilation checks:
- Ensure that the microwave has adequate clearance around all vents and that no packaging material or dust buildup is blocking airflow.
- Clean external vents with a soft brush or vacuum.
Internal fan inspection:
- Remove the outer cabinet to access the cooling fan assembly (usually near the magnetron and transformer).
- Check that the fan blade spins freely by hand and is not obstructed by wiring or insulation.
- Inspect the fan motor wiring harness and connector for secure fit and no burn marks.
- Test the fan motor for continuity; an open motor should be replaced.
After replacement: Reassemble the cabinet, plug in the unit, and run a short heating cycle while listening for proper fan operation. If E8 persists with a known-good fan, the control board's fan relay or sensor circuit may be defective and require professional service.
Repair Difficulty
Required Part
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