LG Refrigerator Compressor Not Running: Repair and Warranty
Quick Answer
The most common reason an LG compressor won't run is a failed start relay or a blown run capacitor. First, listen for a clicking sound coming from the back of the fridge, which indicates the relay is trying to start the motor but failing.
LG's Linear Compressor has a documented failure history, and I've replaced a ton of these. Ignore it and you're looking at total food loss within 24-48 hours. But here's the thing: LG settled a class action over this exact issue and extended the compressor warranty to 10 years on most models. Check your warranty status before you spend a dime, because the part alone can run $300-500.
Phillips #2 screwdriver, Flathead screwdriver for panel clips
What Does the COMPRESSOR Code Mean?
When I walk up to a warm LG, first thing I do is put my hand on the compressor at the back. If it's vibrating but the fridge is warm, it's probably pumping but there's no refrigerant left. Stone cold or clicking every few minutes? That's electrical. Bad main board or a fried start relay. I replaced three of these just last week, so don't feel bad, you're definitely not alone here.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Failed PTC Start Relay35%
Internal Compressor Mechanical Failure30%
Faulty Run Capacitor15%
Main Control Board failure15%
Open Compressor Windings5%
Symptoms You May Notice
Fridge and freezer both gradually warm up over 12-24 hours, usually the fresh food section goes first while the freezer hangs on a little longer before things start to thaw
You hear a click from somewhere in the back lower section every 2-5 minutes, then silence, then another click. That's the relay trying and failing to start the motor.
The compressor housing is stone cold when you touch the back of the unit. It should feel warm if it's been running. Cold means it hasn't started in hours.
Ice maker stops producing and whatever was in the freezer gets soft or starts dripping
Fridge runs completely silently when there should always be a low hum coming from somewhere in the bottom rear
Can you reset a Lg refrigerator to clear the COMPRESSOR code?
Unplug the fridge for at least 10 minutes. Go get a coffee and come back. While it's unplugged, vacuum out the condenser coils at the bottom back using a brush attachment. This takes 5 minutes and honestly fixes more LG issues than people expect. Plug it back in and give it a full 24 hours before you decide it's still not working. LG boards need time to complete a full cooling cycle before you can really judge.
Tools Required for Diagnosis
Phillips #2 screwdriverFlathead screwdriver for panel clipsDigital multimeter set to AC voltage and ohmsVacuum with brush attachment for condenser coilsFlashlight or headlampWork gloves
Service / Diagnostic Mode
Open both refrigerator doors. Press the REFRIGERATOR TEMP button and the ICE PLUS button simultaneously 3 times within 5 seconds. The display will show '88 88' and enter a test mode where you can manually force the compressor to run.
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
ComponentComponent Under Test
Expected Range1–50 ohms
ConditionIf Open (OL) or infinite, replace component.
Frequently Asked Questions
How much does LG refrigerator compressor repair cost?
A start relay or run capacitor swap is usually $150-250 with labor, which isn't bad. But a full Linear Compressor replacement runs $600-900 depending on your area. Here's the good news: if you're within the 10-year warranty window, LG often covers the compressor part itself after the class action settlement. That saves you $300-500 right there. You still pay labor, but that's way better than the full bill. Always call LG first before paying anyone.
Worth repairing or replacing?
If your LG is over 8 years old and the compressor itself has failed mechanically, I usually tell people to replace the fridge. These Linear models have a history of repeat sealed system issues and you don't want to drop $700 on a compressor just to have the evaporator go six months later. But if it's just a $20 relay or some dusty condenser coils? Fix it without question. Easily worth another 3-5 years of life out of the unit.
Can I DIY this repair?
The start relay and run capacitor are both totally DIY-able. Unplug it, pull the relay off, shake it, swap it out. You don't even need tools for that part. Cleaning the condenser coils is also a zero-skill job with a vacuum. But if the compressor itself has failed internally, don't touch it. Sealed system work means cutting refrigerant lines, brazing, and recharging the system. That requires EPA 608 certification and you can't legally buy refrigerant without it anyway.
Does LG cover the compressor under warranty?
Yes, and you need to check this before you pay for anything. After a class action lawsuit over widespread Linear Compressor failures, LG extended the compressor warranty to 10 years from the purchase date on most models made between 2014 and 2021. Labor isn't covered, that's typically $200-400, but the compressor part itself is $300-500 so it's absolutely worth a call. Have your model number, serial number, and purchase date ready before you dial.
My LG is clicking every few minutes but won't run. What's that sound?
That's almost definitely the start relay. What you're hearing is the relay trying to fire the motor, the motor failing to start, the overload protector tripping, and the whole thing resetting to try again in a loop every couple of minutes. Best case scenario honestly. Pull the relay off the side of the compressor and shake it. If it rattles like there's sand inside, that's your fix and it's a $20-35 part. I've seen this on probably a dozen LGs just in the last few months.
How long does a compressor replacement take?
A tech who's done a few of these needs about 3-4 hours. The swap itself isn't complicated but pulling the refrigerant, replacing the compressor, pressure testing, recharging, and checking for leaks all takes time you can't rush. If the refrigerant charge is off even slightly it stresses the new compressor and you'll be back to square one in 6-12 months. I've seen rushed jobs fail fast. Budget the full afternoon.
Models Known to Experience COMPRESSOR Errors
This repair applies to most Lg refrigerators with this error code. Common model numbers include: