Wine Enthusiast wine cooler intermittently shows Er or Err on the display and may beep.

Safety: Unplug the unit before accessing the control board.

• Perform a hard reset: Unplug the cooler for at least 15 minutes. Press and hold any front panel button for 10 seconds (with power off) to discharge residual power, then plug back in.
• Check all connectors: Remove the control board cover and reseat all harness connectors, including sensors, fans, and display.
• Restore factory settings: If the user manual describes a factory reset procedure (often holding specific buttons), perform it to clear corrupted parameters.
• Use surge protection: Plug the unit into a quality surge protector to prevent future firmware glitches from power events.

If the Er code returns frequently, the main control board firmware or memory is likely damaged and the board should be replaced.