C-FO
Samsung
Factory Option / Configuration Error
Microwave displays 'C-FO' and may not respond to inputs.
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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 configuration data, Control board firmware issue, Incorrect board replacement, Power surge
How to Fix / Troubleshooting
Safety: Unplug the microwave before any inspection.
- Power cycle: Disconnect power for 10–15 minutes and reconnect. Sometimes configuration errors clear after a full reset.
- Check model label: Verify the model number and ensure any recently replaced control board matches the exact model and revision.
- Service mode (technician only): Some models allow reprogramming of options in service mode. This should be done only by a Samsung-authorized technician.
- Board replacement: If C-FO persists, the main PCB may need replacement with the correct part number.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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