Frost or ice buildup on the back wall or around the evaporator cover.

Safety: Unplug the wine cooler before defrosting or accessing internal components.

• Manual defrost: Remove all bottles, unplug the unit, and leave the door open until all ice melts. Place towels to catch water.
• Check gasket: Inspect the door gasket for gaps or damage. Close the door on a sheet of paper; if it pulls out easily, the seal is weak. Adjust hinges or replace gasket.
• Inspect defrost components: After defrosting, remove the rear interior panel and visually inspect the defrost heater and sensor. Test them with a multimeter as described in defrost-related entries.
• Reduce door openings: Limit how often and how long the door is opened, especially in humid climates.
• Professional service: If frost returns quickly despite a good gasket and normal use, have a technician test the defrost system and control board.