Display shows E7 and the interior light or door switch functions erratically.

Safety first: Disconnect power before working around the door frame wiring.

• Identify door switch type: Many Lanbopro wine coolers use a magnetic reed switch in the cabinet frame and a magnet in the door.
• Check door alignment: Ensure the door closes squarely and the magnet lines up with the switch area. Adjust door hinges if the door is sagging.
• Test light behavior: With power on, open and close the door to see if the interior light turns on/off consistently. Then unplug before further work.
• Inspect switch and wiring: Remove the inner trim near the switch location. Check the door switch and its wiring for damage or loose connections.
• Replace faulty switch or magnet: If the switch is cracked or the magnet is missing/loose, replace the door switch assembly or resecure/replace the door magnet.
• Control board check: If the switch and magnet are good but E7 persists, the main control board may have a faulty input circuit.