Black+Decker
Intermittent power loss or overheating protection
Microwave stops mid-cycle and resets or goes blank, then comes back on by itself.
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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
Loose power plug or outlet, Overheating transformer or magnetron tripping thermostat, Failing control board, Faulty line filter or internal wiring connection
How to Fix / Troubleshooting
Safety first: Unplug the microwave before internal inspection.
- Check external power:
- Ensure the plug fits snugly in the outlet.
- Avoid using extension cords or power strips.
- Ventilation:
- Confirm that vents are not blocked and that there is adequate clearance around the unit.
- Inspect internal connections (if qualified):
- Remove the outer cabinet.
- Check wiring harness connectors at the line filter, control board, and transformer for looseness or discoloration.
If the unit continues to shut down mid-cycle, an internal component may be overheating or failing and should be diagnosed by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Line Filter Board / Internal Wiring Harness
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