Refrigerator displays communication error between main board and display/door module

Safety first: Unplug the appliance before handling any wiring or boards.

• Inspect harness: Locate the cable connecting the main control board to the display or door module. Check for pinched, cut, or abraded sections.
• Reseat connectors: Disconnect and reconnect both ends of the harness to ensure good contact.
• Check for corrosion: Look for green/white corrosion on connector pins. Clean lightly with contact cleaner if present.
• Test after reseating: Restore power and see if the communication error clears.
• Module replacement: If the error persists, either the display module or main board may be defective. Swapping modules is typically a technician-level task.