Condensation or moisture on the inside of the glass door.

Safety: No internal electrical work is required for basic checks.

Steps:

• Reduce humidity: Use a dehumidifier in the room if humidity is high, and avoid placing the cooler near dishwashers or other moisture sources.
• Limit door openings: Keep the door closed as much as possible to reduce warm, moist air entering.
• Inspect gasket: Check for gaps or damage in the door gasket and replace if not sealing properly.
• Door heater (if present): Some models have a low-wattage heater around the door frame. If condensation is severe and persistent, the heater circuit may have failed and should be checked by a technician.