Microwave shows E12 and may shut down unexpectedly; fan may run at high speed.
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 first: Disconnect power before inspection.
User-level checks:
- Ensure that external vents are not blocked and that there is adequate clearance around the microwave.
- Listen during operation: if you do not hear the usual fan noise, or hear grinding/scraping, the fan may be obstructed or failing.
Technician-level checks:
- Remove the outer cover to access the cooling fan assembly.
- Inspect the fan blades for debris, foil, or insulation obstructing movement; remove any obstruction.
- Spin the fan by hand; if stiff or noisy, replace the fan motor.
- Check for supply voltage at the fan motor terminals when the unit is running; if no voltage, test the fan relay and control PCB.
Recommendation: Replace the cooling fan motor if seized or noisy. Continued use with a faulty fan can overheat the magnetron and other components.
Repair Difficulty
Required Part
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