How do I fix LG Refrigerator Compressor Replacement - Signs & How-To?

Work through the step-by-step fix below. Start with the quick reset and the most common cause, then check the specific part this guide points to. Most fixes need only basic hand tools and the right replacement part.

Can I keep using my LG appliance with this error showing?

Usually not. LG appliances show this error when a part or safety circuit is out of range, so running it can stop the cycle or make the problem worse. Diagnose and clear the error before normal use.

What part is most commonly replaced for LG Refrigerator Compressor Replacement - Signs & How-To?

The parts that most often fix LG Refrigerator Compressor Replacement - Signs & How-To are listed in the parts section of this guide. Match the part to your exact model and serial number before you buy.

Is LG Refrigerator Compressor Replacement - Signs & How-To a DIY repair or do I need a technician?

Many fixes are DIY-friendly with basic tools, such as door switches, drain pumps, water inlet valves, thermostats, heating elements, and filters. Sealed-system, refrigerant, gas, or high-voltage work should go to a licensed technician for safety.

LG Refrigerator Compressor Replacement - Signs & How-To

Q: What does LG Refrigerator Compressor Replacement - Signs & How-To mean?

Fridge won't cool, compressor won't start, or error codes point to compressor failure. Replacing the inverter/linear compressor restores cooling.

LG Refrigerator Compressor Replacement — What This Part Does

The compressor is a sealed-system pump that circulates refrigerant through the evaporator and condenser coils to move heat out of the refrigerator compartment. LG inverter and linear compressors use variable-speed control electronics to adjust cooling demand, which means compressor failures can be mechanical (failed windings, seized pump) or electronic (inverter board not driving the motor correctly).

Compressors fail from worn internal parts, electrical winding shorts or opens, refrigerant leaks that starve the system, restrictions in the sealed system, or inverter control-board issues. LG compressor replacements on some models require a matching software update kit because the control board needs to recognize and drive the new compressor correctly, so this is not always a straight mechanical swap.

Jump to Replacement Steps

Signs It Needs Replacing

Refrigerator not cooling or freezer not freezing Both compartments stay warm even though the unit is running and lights work, which means the compressor is not pumping refrigerant.
Compressor won’t start or hums but doesn’t run You hear a hum or click from the compressor area but no running sound, or the compressor is completely silent when it should be running.
Compressor error code on display The refrigerator display shows a compressor-related fault code, which the control board generates when it detects the compressor is not starting or running at the correct speed.
Compressor runs continuously but no cooling The compressor motor runs constantly but produces no temperature drop, which can indicate internal mechanical failure or a refrigerant leak in the sealed system.
Tripped breaker or blown fuse when compressor tries to start The circuit breaker trips or the internal fuse blows when the compressor attempts to run, pointing to shorted windings or a seized compressor.
Abnormal compressor noise or vibration The compressor makes grinding, rattling, or loud vibration noises that it didn’t make before, signaling internal wear or mechanical damage.

How to Replace It

Unplug the refrigerator from the wall outlet and shut off the water supply line if the unit has an ice maker or water dispenser.
Locate the model and serial number plate (usually inside the fresh-food compartment on the left or right wall or on the left exterior wall) and write down the full model number to order the correct compressor and any required software update kit.
Pull the refrigerator away from the wall and remove the rear access panel to expose the compressor, condenser coils, and sealed-system connections.
Recover all refrigerant from the sealed system using EPA-approved recovery equipment (this step is legally required and must be done by a licensed technician).
Disconnect the wiring harness and ground wires from the compressor, marking each connector for reassembly.
Cut or unbrace the compressor suction and discharge lines using a tubing cutter or torch, then remove the old compressor from its mounting grommets or bolts.
Install the new LG compressor in the mounting grommets, routing the suction and discharge stubs to match the original positions, and braze the connections using silver-solder and dry nitrogen purge to prevent internal oxidation.
Replace the filter-drier on the liquid line (standard sealed-system practice) and braze all connections, then pressure-test the system with dry nitrogen to verify no leaks.
Evacuate the sealed system to a deep vacuum (below 500 microns) using a vacuum pump for at least 30 minutes, then break vacuum with the correct refrigerant type and weight as listed on the unit’s data plate.
Reconnect all wiring and ground connections to the new compressor, install any required software update kit per LG instructions, then reinstall the rear panel and restore power to verify the compressor starts and the refrigerator cools properly.

The Part You Need

Part	Notes
LG refrigerator compressor	Amazon \| LG part TCA38151706 for applicable models. Check your model and serial number plate and cross-reference with LG parts lookup to confirm fitment. Some models require software update kit CJT30000002 ordered separately.
Filter-drier	Amazon \| Sealed-system component replaced during any compressor or refrigerant work. Size and connection type must match your refrigerator’s refrigerant lines.

If this part is failing you may also see one of these codes:

When to Call a Pro

Compressor replacement is sealed-system work that requires EPA 608 certification to legally recover and handle refrigerants, plus specialized tools for brazing, leak testing, evacuation, and charging. LG compressor replacements on many models also require a software update kit that must be installed and programmed into the control board after the mechanical swap. If you are not certified and equipped for refrigerant work, or if the repair cost approaches the price of a new refrigerator, call a licensed appliance technician or consider replacement of the unit.