LG wine cooler frost buildup usually has one of two causes: humid air is getting into the cabinet, or the defrost is not working. Our maintenance page lists exactly those two for frost on the back wall, and says to check the door and gasket first. Start by wiping the gasket, making sure the door closes fully and the cabinet is level, and cutting down on how often the door is opened. If frost returns after you defrost the cabinet, that points away from habit and toward a part that needs a technician.
Why does an LG wine cooler get frost on the back wall?
Frost is moisture that has frozen on the coldest surface in the cabinet. According to our LG wine cooler maintenance guide, frost on the back wall means humid air is getting in or defrost is not working. Humid air gets in through a door that is not sealing, through frequent or long door openings, or in a humid room. A wine cabinet is also judged on steadiness, so a cabinet that cycles constantly and builds frost may be telling you its seal or its airflow has a problem long before the wine does.
The LG wine cooler on this site is the URETC1408N, a 65-bottle multi-zone cellar with an InstaView Auto-Open door, UV-protected glass and a low-vibration cooling system. Frost appears on the back wall of the interior, and the steps below apply to it.
Is the door sealing?
Start here, because a leaking door is the most common cause. Run a finger along the gasket. It should be supple, clean and continuous, with no folded sections and no crust of spilled wine at the bottom corners. Wipe it with warm water and a soft cloth; detergent and solvent harden the rubber. Then check that nothing blocks the door, such as a bottle or a shelf sticking out, and that the door pulls shut on its own. Our page on a wine cooler door that will not seal lists the usual causes: a dirty or deformed gasket, an unlevel unit, a misaligned door or hinge, or an obstruction.
The InstaView Auto-Open door not sealing afterward can mimic a cooling problem, according to our not-cooling guide, so watch the door as it closes. Leveling matters too: a cabinet out of level stresses the door so the gasket cannot seal evenly. Put a level on a middle shelf, adjust the feet, and check that no shelf rattles when the compressor starts.
Are your habits and the room feeding the frost?
Condensation and frost come from the same source: moisture. Our page on condensation in an LG wine cooler says a degree of humidity is normal and good for corks, but heavy moisture means warm, humid air is getting in past the seal or through frequent openings, and a large gap between the set temperature and the room increases it. Keep door openings brief, choose the bottle before you open the door, and keep the cabinet out of direct sunlight and away from heat sources. Our temperature fluctuation page adds that a hot, poorly ventilated location drives swings in the interior.
How do you defrost an LG wine cooler safely?
The exact steps differ by model, so check the owner’s manual first. As general safe steps: move the bottles to a cool place out of the sun, switch the cabinet off at its control, and leave the door open so the frost melts on its own. Do not chip the frost with a knife or an ice pick, because that can puncture the liner. Soak up the melt with towels and never probe the drain with a wire; our maintenance guide lists the drain path among the things to inspect. Dry the cabinet fully, clean the gasket, and then restart it.
If water reaches the outlet or the cord, switch off the breaker at the panel while standing on a dry floor, and never pull a plug from a wet outlet. Do not open panels at the back to look for a defrost part.
When is it a defrost problem and not the door?
If the door seals, the cabinet is level, the habits are good and the frost comes back after defrosting, the maintenance guide says call. That points to the defrost side of the cabinet or the sensor. A technician can check what the cabinet is doing and whether a part has failed. Do not leave the cabinet running for long with a growing layer of frost; book the visit and check the temperature with an independent thermometer in the meantime. Our guide to a wine cooler that is not cooling sets out the other checks, including the zone setpoints and a dusty condenser. See the LG wine cooler repair page for what a visit covers.
