Wine cooler displays E8 and one temperature zone is not cooling correctly

Safety: Unplug the wine cooler before accessing internal panels or the control board.

Steps to resolve E8:

• Identify affected zone: Compare the actual bottle temperature in each zone with the display. Determine whether the upper or lower zone is misreading or not cooling.
• Locate zone sensors: Each zone typically has its own cabinet NTC sensor, often behind a small cover on the rear or side wall of that zone.
• Inspect and test sensors: Remove the sensor covers and check wiring for damage. Disconnect each sensor and measure resistance with a multimeter. Compare readings between zones; a sensor with open or shorted resistance is faulty.
• Check harness to PCB: Trace the sensor wires back to the main control PCB, ensuring connectors are secure and not corroded.
• Replace faulty sensor: Install a new zone NTC temperature sensor for the affected compartment, routing the cable as originally installed.
• Control PCB: If both sensors test good but E8 persists, the dual-zone control PCB may have a communication or input fault and may need replacement.

Tip: After replacement, allow several hours for each zone to stabilize before judging temperature accuracy.