Wine cooler displays E9; unit may not cool and interior light or controls may behave erratically.

Safety: Unplug the wine cooler before accessing any electronic boards. Static discharge can damage components; avoid touching board traces unnecessarily.

Steps to address E9:

• Power reset: Disconnect power for at least 10–15 minutes to allow capacitors to discharge. Plug back in and check if E9 clears.
• Inspect power quality: Ensure the cooler is plugged directly into a grounded outlet. If you experienced a recent power outage or surge, consider using a surge protector in the future.
• Check display-to-main board harness: Remove the control panel cover (front/top) and the rear/bottom service panel to access both the display board and main control board. Locate the multi-wire harness connecting them.
• Reseat connectors: With power disconnected, unplug and firmly reconnect both ends of the harness. Inspect for bent pins, corrosion, or damaged wires.
• Visual inspection of main board: Look for burnt components, bulging capacitors, or darkened areas on the main PCB. Any such signs usually indicate board failure.
• Test operation: Reassemble covers, restore power, and check if E9 persists.
• Replace main control board if necessary: If E9 remains and wiring is intact, replace the NewAir main control board (PCB) with the correct part number for your model. Transfer any wiring connectors one at a time to avoid miswiring.

Warning: Board replacement involves handling live-voltage circuits. If you are not experienced with electrical repairs, contact a professional technician.