F7
Kenmore
Microcontroller or Control Logic Error
Microwave displays F7 and may not start or may shut off quickly after starting.
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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
Corrupted control board firmware, Power surge damage, Internal control board failure, Shorted component on control PCB
How to Fix / Troubleshooting
Safety: Unplug the microwave before inspection.
- Hard reset: Disconnect power for at least 10 minutes to allow capacitors on the control board to discharge. Plug back in and test.
- Check power quality: Ensure the microwave is on a dedicated outlet, not sharing with heavy loads that may cause voltage dips or spikes.
- Inspect control board: Remove the control panel and visually inspect the board for burnt components, bulging capacitors, or scorch marks.
- Replace control board: If F7 persists and no external cause is found, replace the main control board with the correct Kenmore part.
Firmware-level issues are not user-serviceable; board replacement is the standard remedy.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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