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Overheat Protection or Faulty Door Switch Interruption
Microwave runs for a few seconds then shuts off and returns to the clock display without heating fully.
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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 magnetron, weak or intermittent door switch, failing control board relay, blocked cooling airflow, failing inverter
How to Fix / Troubleshooting
Safety: Unplug the unit before inspection.
- Ventilation check: Ensure vents are clear and filters are clean. Overheating can cause thermal cutouts to open and stop the cycle.
- Door test: Gently press on the door during operation. If the unit shuts off when the door is moved, a door interlock switch or latch is likely faulty.
- Short cook test: Try heating a cup of water for 30 seconds. If it consistently stops at the same time, the control board or inverter may be failing.
- Service: A technician should test the door switches, thermal cutouts, magnetron, and inverter/control board and replace any defective parts.
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Repair Difficulty
Hard
4/5
Required Part
Door Interlock Switch Set
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