E11
Summit
Thermal Cut-Out (TCO) Trip on Cavity or Magnetron
Microwave displays E11 and stops mid-cycle; fan and light shut off abruptly
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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
Blocked ventilation, Failed cavity thermal cut-out, Failed magnetron thermal cut-out, Overheating due to extended high-power use
How to Fix / Troubleshooting
Safety: Unplug the microwave and allow it to cool completely before further action.
User steps:
- Check that all air vents on the sides, top, and rear are clear of obstructions.
- Clean grease filters and ensure adequate clearance around the unit.
- After cooling for 30–60 minutes, plug back in and test with a short 30-second cycle.
Technical steps:
- Locate the thermal cut-outs (TCOs) on the cavity and magnetron.
- Test each TCO for continuity. Replace any that are open and not resettable.
- Investigate underlying causes of overheating (fan failure, blocked ducts) before replacing parts.
Repeated TCO trips indicate a serious cooling or component issue; have a technician inspect the cooling system and magnetron.
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Repair Difficulty
Hard
4/5
Required Part
Cavity Thermal Cut-Out
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