Display shows dE or DO and an alarm sounds; unit may not cool while code is active.

Safety first: Unplug the unit before testing or replacing the door switch.

Steps to resolve dE/DO:

• 1. Confirm door closure: Check for racks or bottles preventing the door from closing. Remove obstructions and close firmly.
• 2. Inspect door gasket: Look for gaps, tears, or hardened sections that prevent a tight seal. Warm the gasket with a hair dryer and reshape if slightly deformed.
• 3. Locate the door switch: On many Vinotemp models, the door switch is a small plunger or magnetic reed switch near the top or side of the cabinet opening.
• 4. Test the switch: Disconnect the switch and use a multimeter to check continuity while pressing the plunger or bringing a magnet near the reed switch. Replace if it does not change state.
• 5. Replace and align: Install a compatible Vinotemp door switch. Ensure it is positioned so that the door fully actuates it when closed.
• 6. Check wiring: If the switch tests good, inspect the wiring back to the control board for breaks or loose connectors.

Note: Some models will not run the interior light or cooling if they think the door is open.