Published October 6, 2026 | uhfld
When an LG refrigerator stops cooling, the first question is whether the compressor is the problem or just the part everyone assumes is the problem. LG’s linear compressors have a well-documented history of failures on some models, so it is easy to jump straight to the most expensive diagnosis. But a large share of LG no-cooling calls turn out to be a fan, a defrost fault or a condenser choked with dust, all of which cost a fraction of a compressor job. Knowing which you have before anyone quotes a repair is the difference between a reasonable bill and a new refrigerator you did not need.
An LG refrigerator that is not cooling usually has one of five problems: a stopped evaporator fan, a defrost failure that has iced over the coil, a stopped condenser fan or dirty condenser, a failed control or sensor, or a failed linear compressor.
Check the display for an error code, listen for the fans, and look at the condenser. Many LG models carry a 10-year parts warranty on the linear compressor, so confirm your coverage before paying for one.
This guide covers how to tell those causes apart, what the LG error codes mean, what you can safely check, and when a technician is the right call. We repair LG refrigerators throughout Tampa Bay, including the newer subdivisions around Wesley Chapel, where LG French-door and side-by-side models are common in homes built over the last fifteen years.
All of the cold in a frost-free refrigerator is made at one place: the evaporator coil, usually behind a panel at the back of the freezer. The compressor pumps refrigerant through that coil, a fan blows air across it, and ducts carry that cold air into the freezer and the fresh-food section. Every few hours a defrost heater warms the coil briefly to melt the frost that collects on it. At the bottom rear of the refrigerator, a condenser and its own fan shed the heat the system removed.
A fault anywhere in that chain looks the same from the front: the refrigerator gets warm. Where the warmth shows up first, and what you can hear, are what separate the causes.
If the freezer is still cold but the fresh-food section is warm, or both are warming slowly, and you cannot hear a fan in the freezer when the door switch is held in, the evaporator fan is the prime suspect. LG displays usually report it: Er FF is the freezer fan, Er rF the fresh-food fan on models that have one, and Er IF the ice compartment fan.
A fan can stop because the motor has failed or because frost has grown into the blade. If there is heavy frost on the back panel of the freezer, the real cause is likely the defrost system, covered next.
When the defrost heater, its sensor or the control that schedules defrost fails, frost keeps building on the evaporator coil until air can no longer pass through it. The freezer may stay cold for a while, but the fresh-food section warms, and you may see frost on the back wall of the freezer or hear the fan scraping ice. On LG models Er dH indicates a defrost heater error.
A manual defrost, unplugging the refrigerator for a day with the doors open and towels down, will restore cooling temporarily and confirms the diagnosis if the problem returns a week or two later. If the fresh-food section is the only part warming, our guide to a warm fridge with a cold freezer covers the pattern in more detail.
The condenser sheds heat at the bottom rear of the refrigerator. If its fan stops, or the coil is blanketed in dust and pet hair, the system cannot reject heat and both compartments warm while the compressor runs constantly. LG reports a stopped condenser fan as Er CF.
This matters more in Florida than in most places. A refrigerator in a 78°F Tampa kitchen, or a second refrigerator in a garage that passes 95°F in July, is working against a much higher load, and a partly clogged condenser that would be tolerable in a cooler climate is enough to tip it over. Unplug the refrigerator, remove the rear lower access panel, and vacuum the coil and fan area. If the fan does not spin freely by hand or does not run when the refrigerator is plugged back in, it needs replacing.
Temperature sensors, called thermistors, tell the control board how cold each section is. A failed sensor can make the board think the refrigerator is already cold and stop cooling. LG displays may show sensor errors such as Er FS or Er rS, and Er CO indicates a communication fault between the display and the main board.
Sensors are inexpensive and quick to test with a meter. Control boards are more expensive and should only be replaced after the sensors, fans and wiring have been ruled out.
LG’s linear compressor is efficient and quiet, but it is also the part behind most of the stories about LG refrigerators that stopped cooling. The typical sign is a refrigerator where both compartments warm together, the fans are running, the condenser is clean, and no error code explains it.
Before agreeing to a compressor replacement, check two things. First, whether your model carries LG’s extended parts warranty on the linear compressor, often 10 years on many models; the labor may not be covered, but the part frequently is. Second, whether the diagnosis was actually confirmed by measuring system performance rather than assumed from the brand’s reputation. A compressor job involves opening the sealed system, brazing and recharging refrigerant, and it is worth being sure.
For the full range of LG repairs we handle, see our LG appliance repair page; for every other brand, our refrigerator repair page.
An LG refrigerator that is not cooling is often a fan, defrost or condenser problem, not the compressor, and those are much cheaper fixes. Read the error code, listen for the fans and clean the condenser before assuming the worst, and if the compressor is the culprit, check LG’s warranty before paying for the part.
Usually because cold air is not reaching the fresh-food section. The common causes are a failed evaporator or fresh-food fan, a damper stuck closed, or the early stages of a defrost failure that has partly iced over the evaporator coil.
Er FF is a freezer fan error. The fan that circulates cold air from the evaporator coil has stopped or is running too slowly, often because the motor has failed or frost has grown into the blade.
On many LG refrigerators the linear compressor carries a 10-year parts warranty. Labor and refrigerant are often not included. Check the warranty for your specific model and date of purchase before paying for a compressor.
Yes. If the condenser coil is coated in dust or its fan has stopped, the refrigerator cannot get rid of heat. The compressor runs constantly and both compartments slowly warm. It is more likely in hot kitchens and garages.
Most full-size refrigerators are expected to last roughly 10 to 15 years. Fan, defrost and sensor repairs are usually worth doing well within that range; compressor repairs depend on age, warranty coverage and the condition of the rest of the unit.
That points to a fan, the defrost system or the compressor. We test each one before quoting, so you know exactly what you are paying for.
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