Panasonic
Overheating – Thermal Cutout Activation
Microwave stops mid-cycle and shuts off completely, sometimes coming back on after cooling.
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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 cooling fan motor, Defective thermal cutout or thermostat on magnetron or cavity
How to Fix / Troubleshooting
Safety: Do not block vents or operate the microwave in an enclosed cabinet without proper ventilation.
Steps:
- Check vents: Inspect all sides of the microwave for blocked vents. Remove any obstructions and clean dust buildup.
- Allow cooling: Unplug the unit and let it cool for at least 30 minutes before testing again.
- Listen for fan: During operation, ensure you can hear the cooling fan running. If not, stop using the microwave.
If the problem repeats: The cooling fan, thermal cutout, or magnetron may be faulty and should be inspected by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Thermal Cutout / Cooling Fan Motor
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