LG Refrigerator
Error Codes

22 Compressor Relay Error High Both the freezer and refrigerator compartments lose cooling completely and temperatures rise to ambient room temperature within hours. The compressor is the heart of the cooling system — nothing cools without it running. View -> 33 Compressor relay fault High With the compressor unable to start, no refrigerant is circulating and both compartments gradually warm to ambient room temperature — food spoilage begins within 4–6 hours in the fresh food section. View -> 67 Door not closing properly Medium Warm ambient air continuously entering through the door gap raises interior temperature, causing the compressor to run longer and food in the fresh food compartment to approach unsafe temperatures. View -> AD Auto-door motor failure Medium Knocking on the InstaView panel or pressing the auto-open button produces no door movement — the motor does not actuate and the door remains closed despite the command being received. View -> C1 Display-to-dispenser communication error Medium Pressing the ice or water dispenser paddle produces no response — no water flows, no ice drops, and the dispenser light does not activate, because the display board controlling the dispenser cannot communicate with the main board. View -> DS Defrost sensor short or open circuit High Ice buildup on a non-functioning evaporator coil blocks airflow through the coil fins, progressively reducing cooling efficiency until both compartments begin to warm up over days or weeks. View -> ER CF Condenser Fan Error High The bottom rear or sides of the refrigerator are noticeably hot to the touch. Heat that should be expelled by the fan is building up inside the machine compartment, radiating through the cabinet. View -> ER CO Board Communication Error High Temperature displays show dashes, wrong numbers, or stop updating. Control buttons may become unresponsive. The display may go blank while the refrigerator continues running in background mode. View -> ER DH Defrost Heater Error High A heavy layer of ice or frost is visible on the rear interior wall of the freezer or when the evaporator cover is removed. This frost buildup indicates defrost cycles have not been completing successfully for days or weeks. View -> ER FF Freezer Fan Error High Food in the freezer begins to thaw or feels warmer than usual, even though the compressor is running. Ice cream softens and frozen items may show frost patterns from partial thawing. View -> ER FS Freezer Sensor Error Medium Without accurate temperature data, the control board may run the compressor too long, making the freezer excessively cold, or not long enough, allowing it to warm up. Food may show freezer burn from temperature extremes. View -> ER GF Flow Sensor Error Medium Pressing the water dispenser lever produces no water or only a slow trickle. The dispenser solenoid activates (you can hear a click) but no water flows, indicating a supply or sensor blockage upstream of the dispenser. View -> ER IF Ice Maker Fan Error Medium The ice maker stops producing ice cubes entirely, or production slows dramatically. The ice bin empties over 1–2 days and does not refill despite water supply being connected. View -> ER IS Ice Maker Sensor Error Medium The ice maker stops producing ice, produces ice very slowly, or makes hollow and malformed cubes. Without reliable temperature data, the harvest cycle either triggers too early (hollow ice) or never triggers at all. View -> ER RS Fridge Sensor Error Medium Produce wilts or freezes unexpectedly. Drinks may not reach the set temperature, or items on certain shelves freeze while others stay warm. The damper controlling airflow into the fresh food section cannot regulate properly without sensor data. View -> HS Crisper/pantry humidity sensor fault Medium Vegetables and fruit stored in the humidity-controlled crisper drawers lose moisture and begin to wilt or dry out noticeably faster than usual, suggesting the humidity zone is defaulting to a low-humidity setting. View -> IT Ice maker assembly malfunction Medium The ice maker ceases its production cycle entirely — no new ice cubes are dropped into the bin even though the freezer maintains correct temperature and the water supply is connected. View -> RT Ambient room temperature sensor fault Medium Without an accurate ambient temperature reading, the control board may default to maximum compressor run time, causing the unit to run louder and consume more energy than usual. View -> SS Pantry sensor short or open circuit Medium Food stored in the pantry drawer — deli meats, wine, or specialty items — is either too warm or too cold because the control board cannot read the zone temperature and regulate cooling to it. View ->