Display shows E8 and the wine cooler may not cool or may cycle erratically.

Safety warning: The compressor circuit carries mains voltage. Unplug the unit before opening the rear panel or touching any wiring.

Steps to address E8:

• Confirm compressor behavior: With the rear panel removed, briefly plug in the unit and listen/feel for the compressor attempting to start. Unplug again before handling components.
• Inspect wiring: Check the harness from the main control PCB to the compressor start device for burns, loose connections, or melted insulation.
• Check the control board: Examine the main control PCB for darkened areas, cracked solder joints, or a visibly damaged relay (often a small rectangular component).
• Test compressor separately (advanced): A technician can test the compressor windings and start device. If the compressor is good but the relay does not energize, the PCB is suspect.
• Replace main control PCB: If visual inspection and symptoms point to a failed relay or board, install a Haier-compatible main control PCB. Transfer any jumpers or configuration plugs as per the service documentation.
• Reassemble and test: Refit the rear panel, restore power, and verify that the compressor starts and E8 clears.

Important: If you are not comfortable working around high-voltage circuits, contact a professional appliance technician for this repair.