Display shows E6 and the control panel may be unresponsive or show erratic behavior.

Disconnect power before removing the control panel or accessing the electronics.

E6 typically indicates a communication problem between the user interface and the main control board.

• 1. Power cycle:
  • Unplug the cooler for 10 minutes.
  • Plug it back in and check if E6 clears.
• 2. Access control panel:
  • Remove the screws securing the top/front control panel.
  • Carefully pull the panel forward to expose the wiring.
• 3. Inspect harness and connectors:
  • Locate the multi-pin cable between the display board and main board.
  • Unplug and re-seat both ends several times to clean contacts.
  • Check for pinched or cut wires along the harness path.
• 4. Check for moisture or corrosion:
  • Look for signs of condensation or liquid spills around the control area.
  • Dry gently with a clean cloth; do not use heat guns.
• 5. Replace faulty board:
  • If wiring is intact and E6 persists, replace the Lanbo display (UI) board first, as it is usually easier and cheaper.
  • If that does not resolve the issue, the main control board may need replacement.