Display shows dE and the unit beeps; cooling may stop until the error is cleared.

Safety: Disconnect power before removing trims or panels.

• Check door closure: Ensure nothing is blocking the door. Verify the door is aligned and not sagging; adjust hinges if necessary.
• Inspect door magnet: Many Della Marta wine coolers use a magnet in the door frame and a reed switch in the cabinet. Confirm the magnet is present and not loose.
• Test switch: Locate the door switch (often behind the top frame or side trim). With the unit unplugged, test continuity across the switch while opening and closing the door. Replace if it does not change state.
• Replace sensor: Install a new door reed switch or door switch assembly if faulty, and ensure the magnet aligns directly with the switch when the door is closed.