Wine cooler displays E5 and may not respond properly to temperature settings.

Safety: Disconnect power before handling control boards. Avoid touching board traces with bare hands.

Steps:

• Power reset: Unplug the wine cooler for at least 10 minutes to allow capacitors to discharge. Plug back in and check if E5 clears.
• Inspect wiring between boards: Remove the control panel and rear access cover to locate the main control board. Check the ribbon cable or harness between the user interface and main board for secure connections and no visible damage.
• Look for surge damage: Examine both boards for burnt components, discoloration, or bulging capacitors.
• Reseat connectors: Gently unplug and replug all connectors to ensure good contact.
• Replace main control board: If E5 persists and no wiring issues are found, the main control board is likely defective. Transfer any jumpers or configuration plugs from the old board to the new Whirlpool-compatible board as instructed in the service documentation.
• Check power quality: Use a surge protector or dedicated circuit to prevent future electronic failures due to voltage spikes.

When to seek service: If you are not experienced with electronic board replacement, a professional technician should perform this repair.