E50
Monogram
Overtemperature Protection or Thermal Cutout Trip
Microwave displays E50 and may shut down or refuse to start, often after extended use.
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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
Tripped cavity thermal cutout, tripped magnetron thermal cutout, blocked cooling airflow, failed cooling fan, defective thermal cutout
How to Fix / Troubleshooting
Safety: Unplug the microwave and allow it to cool for at least 30 minutes before inspection.
- Check ventilation: Ensure that cabinet cutouts and clearances meet Monogram installation requirements and that vents are not blocked.
- Clean filters: Remove and clean grease filters; replace charcoal filters if clogged.
- Reset thermal cutouts: Some thermal cutouts are self-resetting once cooled; others are one-time fuses. A technician can test continuity of the cavity thermal cutout and magnetron thermal cutout.
- Replace failed components: Replace any open thermal cutouts and verify the cooling fan motor is operating correctly to prevent recurrence.
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Repair Difficulty
Hard
4/5
Required Part
Cavity Thermal Cutout
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