LG Refrigerator Not Cooling: Causes & Fixes
An LG refrigerator that isn't cooling is usually one of a handful of common failures — most of which start with something you can check yourself before scheduling a repair visit.
Common causes
Dirty or blocked condenser coils
Dust and pet hair build up on the coils behind or beneath the fridge, forcing the compressor to work harder and eventually struggle to keep up.
Frozen or failing evaporator fan
LG refrigerators use a fan to circulate cold air from the evaporator coils into the fresh food and freezer compartments. If the fan motor fails or ice builds up around it, cold air stops moving.
Defrost system failure
If the defrost heater, thermostat, or control board fails, frost builds up on the evaporator coils and blocks airflow — a very common cause on LG models.
Blocked air vents
Overpacking the freezer or fresh food section can block the vents that circulate cold air between compartments.
Failing compressor or sealed system leak
Less common, but if the compressor runs constantly without cooling, or you hear unusual clicking, the sealed refrigerant system may need professional diagnosis.
What to check first
Check the thermostat settings
Confirm the fridge and freezer are set to normal temperatures (37°F / 0°F) and weren't accidentally bumped to a warmer setting or vacation mode.
Clean the condenser coils
Unplug the unit, pull it out, and vacuum the coils (usually on the back or underneath behind a bottom grille) to remove dust buildup.
Check for frost buildup in the freezer
Heavy frost on the back wall of the freezer usually points to a defrost system failure — this typically requires a technician.
Make sure vents aren't blocked
Rearrange items so nothing is pressed against the interior air vents, especially in the freezer.
Listen for the compressor and fans
If you hear the compressor running constantly but the unit still isn't cold, or hear no sound at all, the sealed system or compressor may be the issue.
When to call a technician
If cleaning the coils and clearing the vents doesn't restore cooling within a few hours, or if you see frost buildup on the freezer's back wall, the defrost system or sealed refrigerant system likely needs a trained technician — continuing to run the unit risks spoiling food and can let a small issue become a bigger repair.
Frequently asked questions
Why is my LG refrigerator freezer cold but the fridge is warm?
This usually points to a blocked air vent between the freezer and fresh food compartment, or a failing evaporator fan that isn't pushing cold air into the fridge section.
How much does LG refrigerator repair cost in Denver?
Most LG refrigerator repairs range from $150 to $450 depending on the part needed. Diagnosis starts with a $79.95 fee that's waived when you approve the repair.
Need a brand-specific repair? See our Refrigerator Repair service for this brand.
Still having trouble? We can fix it today.
Call now for same-day service across the Denver metro, or request a free estimate online.