F28
Kenmore
Serial Communication Error (User Interface to CCU)
Washer-dryer combo shows F28 and may not respond to button presses or may stop mid-cycle.
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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 UI harness, failed user interface board, failed main control board, oxidized connectors
How to Fix / Troubleshooting
Safety first: Disconnect power before removing the console.
- Access console: Remove screws securing the control console, then carefully tilt it forward.
- Reseat UI connectors: Unplug and firmly reconnect the ribbon cable or harness between the user interface (display board) and the main control board.
- Inspect for corrosion: Look for green or white corrosion on connector pins. Clean lightly with contact cleaner if present.
- Check for moisture: If the console area shows signs of moisture (from steam or leaks), dry thoroughly and correct the source of moisture.
- Board replacement: If F28 persists, either the UI board or CCU may be defective. Replace the suspected board following ESD precautions.
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Repair Difficulty
Hard
4/5
Required Part
User Interface Control Board
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