Samsung
Intermittent Shutdown – Overheat or Door Interlock Fault
Microwave runs for a few seconds then shuts off and may restart or require pressing Start again.
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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 or cavity, Weak thermal cut-out, Loose door switch, Failing main control board
How to Fix / Troubleshooting
Safety: Unplug the microwave if there is any burning smell or visible smoke.
- Ventilation: Ensure all vents are clear and that there is adequate space around the microwave. Clean grease filters on OTR models.
- Load test: Try heating a cup of water. If the unit shuts off at the same time each attempt, an internal thermal device may be tripping.
- Door test: Gently press on the door while running. If touching the door causes shutdown, the door switches or latch are likely faulty.
- Service: A technician should test thermal cut-outs, door switches, and the control board for intermittent faults.
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Repair Difficulty
Hard
4/5
Required Part
Thermal Cut-Outs / Door Switches / Main PCB
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