F1E5
Whirlpool
Magnetron or Inverter Overcurrent / Overvoltage
Microwave displays F1E5 and does not heat
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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.
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Possible Causes
Shorted magnetron, Faulty inverter board, Short in high-voltage wiring, Blocked cooling airflow causing overheating
How to Fix / Troubleshooting
Critical safety: High-voltage components are extremely dangerous. Do not attempt to test the magnetron or inverter without proper training.
- Reset and cool down: Unplug the microwave for at least 15 minutes to allow components to cool and discharge. Restore power and test briefly.
- Check ventilation: Ensure all vents are clear and the cooling fan runs when the unit is started. Clean any heavy dust buildup around vents and fan grilles.
- Visual inspection: With power disconnected, remove the outer cabinet and inspect the magnetron area for burn marks, melted plastic, or arcing signs. Do not touch terminals.
- Professional diagnosis: A technician should test the magnetron, high-voltage wiring, and inverter board. Typically, either the magnetron or inverter will need replacement.
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Repair Difficulty
Professional Required
5/5
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