F5
Black+Decker
Door switch monitoring fault
Microwave displays F5 and will not start; sometimes appears after repeated door operations.
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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
Incorrect sequence of door switch operation, Failed monitor switch, Misadjusted door latch, Wiring issue in door switch circuit
How to Fix / Troubleshooting
Safety first: Unplug the microwave before working near door switches.
- Operate door slowly: Open and close the door slowly and firmly, then try to start a cycle. If F5 clears temporarily, a switch may be borderline.
- Inspect door switches:
- Remove the outer cabinet.
- Locate the primary, secondary, and monitor switches.
- Ensure the switches are firmly mounted and actuated in the correct order by the latch.
- Replace faulty switch: If any switch shows signs of burning, melting, or mechanical failure, replace it with the correct Black+Decker door switch.
Because the monitor switch is a critical safety device, improper repair can be dangerous. If unsure, contact a professional.
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Repair Difficulty
Hard
4/5
Required Part
Door Monitor Switch
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