What does CF mean?
Communication failure between main control board and user interface board.
Common causes
- Loose ribbon cable
- Failed main control board
- Failed UI board
- Wire harness damage
Diagnostic & testing steps
- 1. Power cycle - unplug for 5 minutes
- 2. Check ribbon cable at both boards
- 3. Inspect for damage to ribbon cable
- 4. Verify 5VDC at communication pins
- 5. Test each board individually
Tools required
- Multimeter
- 1/4 inch nut driver
- T20 Torx
OEM parts & part numbers
Main Control Board, User Interface Board, Ribbon Cable
Part numbers: W10310240, W10894866
Safety warning
⚠️ Always unplug before accessing control boards
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