An LG refrigerator not cooling splits into two very different problems, and which one you have decides everything else. If the fresh food compartment is warm while the freezer is still frozen, the fault is airflow: the evaporator fan, the defrost system or the damper. If the whole cabinet is warm and the freezer has thawed too, the fault is refrigeration itself, which points at the sealed system or the compressor.
This guide walks the ordinary causes we find most often on LG fridges in London, Stratford and Waterloo, shows how to use LG Smart Diagnosis, and gives a straight account of the linear compressor and its warranty.
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LG refrigerator not cooling: work out which kind you have
Put a thermometer in a glass of water in each compartment and give it two hours. A fridge should sit near 3 to 4 degrees Celsius and a freezer near minus 18. Then check two things: whether the ice cream is still hard, and whether air moves from the vents at the back of the freezer.
Warm fridge with a working freezer is the most common pattern on LG French-door models, and it is an airflow problem nearly every time. Our post on a fridge not cooling when the freezer still works walks that split in more detail.
Everything warm, with the compressor silent or running non-stop, is the sealed-system pattern. Read the condenser coil check below first, because a smothered condenser produces the same symptom for a fraction of the cost. Getting this right is the first step in any LG refrigerator not cooling call.
The ordinary causes we find most often
Condenser coils and the condenser fan
Unplug the fridge and pull the lower rear access panel or the toe grille. If the coil is furred with dust and pet hair, the refrigerant cannot shed its heat and the fridge runs constantly while losing ground. Vacuum it and confirm the condenser fan spins freely. A blanketed coil is the single most common reason for an LG refrigerator not cooling that we find.
While the panel is off, look at the condenser fan itself. It should spin freely by hand and run whenever the compressor runs. A fan that is stalled by a wad of pet hair, or one whose motor has seized, lets the compressor run hot and the fridge slowly lose ground through the day. Cleaning the coil and freeing or replacing the fan is inexpensive and it is the fix for a large share of the LG refrigerator not cooling calls we attend in older kitchens.
Evaporator fan
This fan lives behind the rear wall of the freezer and moves cold air into both compartments. If it fails, or its blade freezes into ice, the freezer stays cold near the coil while the fridge goes warm. Press the freezer door switch: the fan should be audible. Clicking is a blade catching ice; silence points at the motor.
Defrost system
When the defrost heater, sensor or thermal fuse fails, frost builds into a solid block over the evaporator coil until air cannot pass through. The tell is a fridge that gets worse over a week or two, improves for a day after the doors are left open, then fails. A defrost fault is a classic cause of an LG refrigerator not cooling that gets slowly worse over a week or two.
Damper, seals and habits
The air damper is a motorised flap that meters cold air into the fresh food side; stuck closed it gives a warm fridge with a cold freezer. Also run a bill through the door gaskets and see if it drags. These habit issues account for a surprising share of LG refrigerator not cooling complaints.
LG Smart Diagnosis and what it tells you
Most LG refrigerators from the last decade support Smart Diagnosis, which plays a data tone through the appliance to LG’s app or phone support. It is useful for confirming a fault the panel does not display. Instructions vary by model and are on the LG Canada support site.
Be realistic about what it gives you. Smart Diagnosis names the system it thinks is at fault, not which of three parts in that system failed. A fan-circuit result still needs a meter at the fan connector. If the panel is showing an error code, note it before you cut power, because a reset clears stored codes.
The LG linear compressor question, answered honestly
LG uses a linear compressor in most of its refrigerators rather than the conventional reciprocating design. It drives a piston on a spring directly with a magnetic coil, which cuts friction, runs quietly and modulates speed instead of switching hard on and off. On efficiency and noise it is genuinely good engineering.
It is also true that LG faced widely reported complaints about linear compressor failures on units built in the mid-2010s, and the design was revised afterwards. We still see the occasional compressor failure from that era. On newer generations, in our experience, a compressor is not the first thing we suspect — fans, defrost parts and dirty condensers are far more common.
The practical point is diagnostic, not brand loyalty. A failed compressor and a smothered condenser coil look identical to a homeowner: warm everywhere and a machine that never stops running. If a technician quotes a compressor without checking the condenser and the fans first, get a second opinion. Sealed-system work sits above the usual $220 to $500 fridge repair band. That is why we never call an LG refrigerator not cooling a compressor failure until the ordinary causes are ruled out.
From the van: the first thing we do on an LG cooling call is put a hand on the freezer air vents and listen. Air moving means the evaporator fan is alive and we are looking at the damper or a partial defrost problem. Silence with a warm fridge and a warm freezer means we are checking the compressor and the sealed system, and that is the call where the warranty paperwork matters.
Appliance Experts repairs LG refrigerators across London and Southwestern Ontario, 6 AM–9 PM, seven days a week — usually same day, which matters when a fridge full of food is warming up. The service call is free with the repair, and every job carries a 90-day parts and labour warranty.
What the LG compressor warranty covers, and what it does not
LG has long advertised a ten-year limited warranty on the linear compressor, and it is real coverage worth using. Read your own warranty card, because the structure catches people out:
- The first year is typically full coverage: the part and the labour to install it.
- After year one it generally covers the compressor part only. Labour, refrigerant and driers are yours.
- It covers the compressor, not the whole sealed system. A leak elsewhere is a different claim, and you will need proof of purchase plus the model and serial number.
Start any potential claim with LG directly, then decide who does the work. We can diagnose the fridge and give you a written finding to take to LG. Warranty coverage can change the whole economics of an LG refrigerator not cooling repair.
When to call a pro, and when to think about replacing
Do the free checks first: confirm the settings, make sure the doors seal, vacuum the condenser coil and listen for the fans. If the fridge is still warm after 24 hours with a clean coil, call, because the remaining suspects need meter testing or refrigerant tools. Call sooner if there is a burning smell, if it trips a breaker, or if the compressor is hot and cycling every few minutes. Health Canada food safety guidance covers what is still safe to keep.
Our LG refrigerator repair service covers fans, defrost systems, dampers, boards and sealed-system work, and our LG appliance repair page covers the rest of the lineup. In the city, our London fridge repair team can usually be out the same day. A fan, damper or defrost repair is worth doing at almost any age; a sealed-system failure past twelve years and out of warranty is where we tell people to price a new fridge.
Frequently asked questions
Why is my LG fridge warm but the freezer is still cold?
That pattern is about airflow rather than refrigeration. The usual causes are a failed evaporator fan behind the freezer wall, a defrost fault that has let frost block the evaporator coil, or an air damper stuck closed. All three stop cold air reaching the fresh food compartment while the freezer stays cold near the coil.
How do I reset an LG refrigerator that is not cooling?
Unplug it or switch off its breaker for about five minutes, then restore power and leave the doors closed for several hours before judging the result. Confirm the temperature settings afterwards, since a reset can return them to default. A reset clears a control glitch but will not fix a failed fan or a dirty condenser coil. A reset only helps an LG refrigerator not cooling because of a control glitch, not one with a failed part.
Give the fridge a full 24 hours after any reset or coil cleaning before you judge the result, and keep the doors closed as much as you can during that time. A large fridge that has drifted warm holds a lot of heat in its contents, and it can take most of a day to pull the fresh-food section back down to 3 °C even when everything is working. Checking every hour and opening the doors to do it only slows the recovery and makes a healthy fridge look faulty.
How long does an LG linear compressor last?
Most run for the life of the fridge, which is generally ten to thirteen years on a French-door model. LG did have well-reported compressor failures on units built in the mid-2010s and revised the design afterwards. On the fridges we service today, fans, defrost parts and clogged condenser coils cause far more cooling complaints.
Does LG cover the labour on a compressor replacement?
Usually only during the first year. The long compressor warranty typically covers the compressor part itself for ten years, while labour, refrigerant and sealed-system materials after year one are the owner’s cost. Check your own warranty card and have the model, serial and proof of purchase ready before contacting LG.
Is an LG refrigerator that is not cooling worth repairing?
Yes for the common faults. An evaporator fan, damper, defrost heater or control board repair is worth doing on almost any LG that is otherwise sound, and typical fridge repairs here run 220 to 500 dollars. A sealed-system failure past about twelve years and out of warranty is where replacing usually wins.
The bottom line
An LG refrigerator not cooling is a two-branch problem. Warm fridge with a cold freezer means airflow: evaporator fan, defrost or damper. Warm everywhere means refrigeration, and there you check the condenser coil and fan before accepting a compressor diagnosis. Use Smart Diagnosis for a hint, check your compressor warranty before paying anyone, and know that after year one the long warranty usually covers the part and not the labour. For a written diagnosis you can act on, call Appliance Experts at (519) 900-3010 or book online.