E9
Summit
Communication Error Between Display Board and Main Control Board
Wine cooler display shows E9 and interior lights or controls may behave erratically.
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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 or damaged communication harness, Corroded connectors at display PCB, Faulty display/control panel, Faulty main control board
How to Fix / Troubleshooting
Safety: Disconnect power before removing any panels.
- Access control panel: Remove the front control panel bezel or top trim to expose the display PCB.
- Inspect ribbon cable/harness: Check the multi‑wire harness that runs from the display board to the main control board (often at the rear or bottom). Look for pinched, cut, or chewed wires.
- Reseat connectors: Unplug and firmly reconnect both ends of the harness. Ensure connectors are fully seated and locking tabs engaged.
- Check for corrosion: Look for green/white corrosion on pins. Clean lightly with contact cleaner and a soft brush if present.
- Test continuity: With the unit unplugged, use a multimeter to verify continuity on each wire in the harness.
- Replace faulty board: If wiring is intact, replace the display/control panel board first. If E9 persists, replace the main control board.
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Repair Difficulty
Medium
3/5
Required Part
Display / Control Panel Board
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