LG Refrigerator Not Cooling? What’s Actually Wrong
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You pick open the fridge and the air is warm. The milk is nearly. Something is wrong–but your LG is still humming, as though nothing were wrong.
It can be the fresh food section only, or both compartments – LG fridge freezer not cooling at the same time the diagnosis is different, and, accordingly, the repair is different. This guide includes all actual causes, their appearance, and sound, and when a technician should be contacted.
Rule Out the Easy Fixes
A surprising number of LG refrigerator not cooling calls come down to one of these:
Thermostat setting
Fridge- set to 37F, freezer set to 0F. LG touch controls are very easy to bump, particularly during door cleaning.
Door gasket
Shut the door on a dollar bill. When it draws out without resistance, it will be leaking out cold air 24/7.
Condenser coils
On the bottom front behind the toe grille. With dust and pet hair, the fridge cannot lose heat and cooling decreases. Using a brush attachment, vacuum them — 10 minutes, once a year.
Clogged vents / power cycle
Confinement prevents internal air vents. Also, unplugging after 60 seconds and then wait 4-6 hours before drawing any conclusions is also recommended, so as to reset the control board.
Good news: When one of these cracks it, you can be finished, no technician required.
LG Compressor – Most Technician Known Issue
When the speed checks are not helpful, the following is the most probable suspect: LG refrigerator running but not cooling: motor is humming, the lights are on but nothing is cold. It is the typical indication of a compressor which is attempting to start and is unable to create pressure.
Why LG compressors fail
The linear compressor manufactured by LG was sold as less noisy and more effective than the traditional models. The fact: many of the units produced between 2014 and 2019 failed in 5-7 years. The repercussions were a class action lawsuit, as well as an official extended warranty program – commonly known as the LG refrigerator compressor recall.
What to do to identify a compressor failure.
- LG refrigerator running but not cooling – hum without cold air
- Clicking or stuttering at the lower back – compressor trying to start and failing.
- Short cycling – switches on and off a few minutes.
- Er FF error message on display.
Is a noisy fridge dangerous?
The question that is frequently asked by the homeowners is: is a noisy fridge dangerous? The clicks and stutter of the compressor zone are not a safety issue – although it is a sign that the compressor is malfunctioning. What would cost 350 to repair today would cost 900 in a few weeks. Don’t ignore it.
⚠ Important: Compressor replacement requires EPA Section 608 certification by law. This is not a DIY repair — refrigerant handling is regulated. Call a licensed technician.
LG refrigerator error codes – the meaning.
If your display is showing a code, write it down before calling anyone. LG refrigerator error codes cut diagnostic time and get you an accurate quote faster:
- FF / Er FF — evaporator fan failure (cold air not circulating)
- Er rF — refrigerator compartment fan failure
- Er dH — defrost heater failure (frost building up unchecked)
- Er IS — ice maker sensor fault
- Er CO — control board communication error
LG refrigerator not making ice
When your LG refrigerator not making ice, it is likely not the ice maker, but rather the ice-freezer. The ice maker requires regular 0oF to accomplish a cycle. In case the freezer is hot, repair the cooling problem. After ensuring that the freezer is maintaining the temperature, next check the water inlet valve or Er IS error code.
Evaporator Fan Failure — When the Freezer Works but the Fridge Doesn’t
One of the most common calls that we receive is LG fridge not cooling but freezer works. The freezer is solid ice, food frozen, but the fresh food section is 50o F or higher. The giveaway is that divide.
The LG has a single evaporator coil within the freezer section to cool the two compartments. A fan motor forces the cold air into the fridge through a duct. As that motor shuts off, the fridge receives nothing, but the freezer maintains itself cold.
Warning signs
- Freezer normal; fresh food part 50C and above.
- Scraping or squeaking in the interior of the wall of the freezer.
- Heavy frost on the back of the freezer panel – indicates the defrost heater is also gone.
Defrost system connection
When the automatic defrost heater malfunctions, the frost accumulation will continue until it physically clogs the fan blade. Quick test: disconnect 24 -48 hours with both doors open (manual defrost). When cooling comes back, then the defrost heater/thermostat breaks down again in a few weeks, replace it, not the fan motor.
☎️ Freezer cold, fridge warm? This is a fast refrigerator repair when caught early. Call us and we’ll diagnose the fan or defrost system same day.
Thermistor and Control Board – Most Complex Thing To Find
All LG cooling failures are not orchestratic. At other times the LG refrigerator not cold enough – at 45-50F rather than 37F, food rotting sooner than it should, all technically operating but nothing quite right. This indicates the thermistor (temperature sensor) and not the compressor.
When a bad thermistor is present, it is informing the control board that the fridge is already chilled. The compressor is short-circuited by the board. Temperature remains a bit too warm. The most commonly misdiagnosed problem of LG fridge repair is one it costs a homeowner $900-1,000 to change a compressor when a sensor worth 15-25 was the real problem.
A bad control board has similar symptoms; intermittent cooling, fans operating continuously, or the compressor does not switch on at all. The simplest trigger is power surges, tell your technician about any recent power outages.
→ Why diagnosis comes first:A defective thermistor can be detected in just a few minutes by a technician who has a multimeter and can access the service mode of LG. Otherwise, you are just making guesses – and LG repair is not a cheap thing to guess.
Refrigerant Leak — Both Compartments Warm
Signs of leakage of a refrigerant
- Compressor is a continuous run, no compartment cools
- Gurgling or hissing in the back
- Freezer has not formed frost anywhere even after days of operation
Quick Reference: Symptom → Most Likely Cause
- LG refrigerator running but not cooling → linear compressor failure
- LG fridge not cooling but freezer works → evaporator fan motor
- LG fridge freezer not cooling (both warm) → refrigerant leak or control board
- LG refrigerator not cold enough (partial, 45–50°F) → thermistor or dirty coils
- LG refrigerator not making ice → freezer temperature issue; fix cooling first
- LG refrigerator error codes on display → see table above before calling
- Is a noisy fridge dangerous? → not immediately, but compressor is failing
- LG refrigerator compressor recall → check lg.com/us/support — may be free
☎️ Wilson & Myers are the company that specializes in the LG refrigerator repair. We will diagnose your fridge without ordering a single part, we will not have to guess, we will not have any unexpected costs. Make a service call at.
