CF
Frigidaire Professional
Communication Failure Between Boards
Display shows CF; refrigerator may not respond correctly to commands or may not cool.
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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 communication harness, Damaged wiring between main and auxiliary boards, Failed main control board, Failed dispenser or UI board
How to Fix / Troubleshooting
Safety First: Disconnect power before accessing any control boards.
- 1. Inspect harnesses: Remove rear access panel and dispenser/UI covers. Check all multi‑wire harnesses for secure fit and damage.
- 2. Reseat connectors: Unplug and firmly reconnect each communication harness.
- 3. Look for corrosion: Any green/white corrosion on pins indicates moisture damage; clean with contact cleaner and consider harness replacement.
- 4. Replace suspect board: If wiring is intact, replace the main control board first. If CF persists, replace the UI/dispenser board.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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