OK
Thermal Cutout or Door Interlock Interruption
Microwave runs for a few seconds then stops with no error code; display remains on
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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
Overheating cavity thermostat, Failing magnetron thermostat, Intermittent door switch, Blocked ventilation
How to Fix / Troubleshooting
Safety: Unplug the microwave and allow it to cool before inspection.
- 1. Check ventilation: Ensure adequate clearance around the microwave and that vents are not blocked by cabinets or objects.
- 2. Test with lower power: Run the microwave at 50% power with a cup of water. If it runs longer, overheating may be the issue.
- 3. Inspect thermostats: With the cover removed (unplugged), locate and test the thermostats for intermittent operation using a multimeter and gentle heat (if skilled).
- 4. Check door switches: Perform a wiggle test on the door while running to see if movement causes shutdown.
- 5. Replace faulty thermostat or door switch set as needed.
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Repair Difficulty
Hard
4/5
Required Part
Magnetron Thermostat
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