Why is my LG refrigerator not cooling?
An LG refrigerator that stops cooling is most often a failed linear compressor ($400–$900 repaired) or a defrost system failure ($200–$400). LG's linear compressor has a documented failure pattern and a 10-year compressor warranty — check your warranty status before paying for any repair.
LG extended the compressor warranty to 10 years on most models sold after 2018 following class action settlements. If your unit is within that window, the compressor replacement may be covered — the warranty call should be your first move, not your last.
Most likely causes
| Cause | How to tell | The fix | Typical cost |
|---|---|---|---|
| Linear compressor failure | Both fresh food and freezer compartments warm up over 24–48 hours; clicking sound from the back (compressor trying to start and failing); unit running constantly but not cooling | Compressor replacement — check warranty status first (LG 10-year compressor warranty on qualifying models). Covered: LG pays parts + labor. Out of warranty: $400–$900 repaired. | $0 (warranty) or $400 – $900 |
| Defrost system failure (evaporator iced over) | Freezer may still be cold but fresh food section is warm; frost visible behind the freezer back panel; fan running but little airflow into the fridge | Manual defrost (unplug 24–48 hours) confirms the diagnosis — if cooling returns, the defrost heater, thermostat, or control board needs replacement | $200 – $400 |
| Evaporator fan not running | Freezer cold, fresh food warm; fan noise absent when freezer door is open; this is also a defrost symptom but the fan itself can fail independently | Replace evaporator fan motor — a moderate repair on LG units | $150 – $300 |
| Condenser coils dirty | Unit runs warm and longer than normal; happened gradually over months; coils at the back or underneath caked with dust and pet hair | Clean condenser coils — DIY with a vacuum and coil brush; can restore 20–30% efficiency lost to buildup | $0 DIY / $75 – $150 as part of a service call |
| Main control board failure | Erratic behavior — some cooling functions work, others don't; error codes on the display; defrost, fan, and compressor all behave inconsistently | Control board replacement — confirm diagnosis with a multimeter and error code check before replacing the board | $200 – $500 |
Try this first (before you pay anyone)
- Check your model number and manufacture date against LG's warranty lookup at lg.com — LG's linear compressor warranty is 10 years on qualifying models. If you're within the window, call LG directly (1-800-243-0000) before calling an independent tech. Warranty service is free.
- Check if the condenser fan (near the compressor at the back or bottom) is spinning — if it's not, that's why the compressor is overheating and not cooling. This is a cheaper fix than a compressor.
- Unplug the refrigerator for 24 hours and leave the doors open — if it cools normally for several days after restart, you have a defrost problem, not a compressor problem. The defrost system will eventually fail again, but this confirms the less expensive diagnosis.
- Check the temperature settings — LG units have been known to have temperature settings changed accidentally (especially after a power outage). Recommended: 37°F fresh food, 0°F freezer.
Call a pro when…
- The fridge is warm and the compressor is clicking but not starting — this is the classic LG linear compressor failure and requires professional diagnosis and replacement
- You're outside the 10-year warranty window — sealed system and compressor work requires EPA 608 certification and refrigerant handling equipment
- Error codes are showing on the display — LG error codes like Er FF, Er dH, Er rF, or Er CO map to specific component failures; a tech with an LG service manual can diagnose accurately in one visit
- The freezer is cold but the fresh food section is warm — this is a defrost or fan issue that a tech can pinpoint quickly
Repair or replace?
LG refrigerators run about 12–15 years. A compressor repair at $400–$900 on a unit under 8 years old is worth doing — especially if it's covered under warranty. Past 10 years, apply the 50% rule: if the repair quote exceeds half the price of a comparable new unit ($1,200–$2,000 for a similar LG), put the money toward replacement. LG's linear compressor reputation also affects the calculus — some owners on a second compressor replacement choose to exit the brand entirely rather than risk a third failure.
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Related questions
Why does my LG refrigerator keep failing?
LG's linear compressor design, introduced in the early 2010s, has a documented failure rate higher than traditional reciprocating compressors. Multiple class action settlements resulted in extended warranties. The compressor failing isn't unusual — check your warranty status, because on qualifying models LG covers parts and labor for 10 years from purchase date.
How do I know if my LG compressor is under warranty?
Go to lg.com and search 'compressor warranty' or call 1-800-243-0000 with your model and serial number. LG extended the linear compressor warranty to 10 years on most French door, side-by-side, and bottom-freezer models manufactured after 2018, and on many earlier models covered by settlements. Independent repair companies cannot process this warranty — you must contact LG directly.
How much does it cost to fix an LG refrigerator compressor?
Under warranty: $0 — LG covers parts and labor. Out of warranty: $400–$900 typically, depending on the service company and whether refrigerant recharge is needed alongside the replacement. Get the warranty status resolved before agreeing to any out-of-pocket compressor quote.
Should I repair or replace my LG refrigerator?
If the repair is covered under warranty, repair. If the unit is under 8 years old and the repair cost is under $500, repair. If it's past 10 years old or you're looking at $700+ in out-of-pocket compressor costs, run the 50% rule: repair cost vs. 50% of a comparable new unit. LG's reputation also matters here — if this is a second compressor failure, replacement gives you a fresh warranty clock and a potentially more reliable unit.