LG Refrigerator Not Cooling? Common Causes and When the Compressor Is the Problem

When an LG refrigerator stops cooling, the freezer may still feel cold while the refrigerator compartment starts to warm first. In other cases, both sections become warm at the same time.

Most problems fall into two broad categories:

• Airflow and defrost problems: These include a failed evaporator fan, blocked air damper, frozen air return, faulty defrost heater, or clogged drain. These are ordinary refrigerator repairs.
• Sealed-system problems: These involve refrigerant circulation, the compressor, or another sealed component. Compressor repairs are usually the most expensive option.

The symptoms can help narrow down the cause, but an accurate diagnosis requires testing. Here is how to check the simple possibilities first and understand when an LG refrigerator repair may involve the compressor.

Start Here: The 10-Minute Checks

Before scheduling a refrigerator repair service, complete these basic checks:

1. Confirm the refrigerator has power. Check that the interior lights and display work. Make sure the breaker has not tripped and that the power cord is firmly connected.
2. Check for Demo or Showroom Mode. In this mode, the lights and controls may work while the cooling system remains off. Review the owner’s manual or LG support instructions for how to disable it.
3. Review the temperature settings. Settings may have been changed accidentally. A common target is about 37°F for the refrigerator and 0°F for the freezer.
4. Listen for the compressor and condenser fan. A quiet hum or low vibration may be normal. Complete silence, repeated clicking, or unusual cycling can indicate a problem.
5. Inspect the condenser coils. Coils behind or beneath the refrigerator should not be packed with dust, lint, or pet hair.
6. Check clearance around the unit. The refrigerator needs room to release heat. Do not push it flush against the wall or block the lower grille.
7. Look at the door gaskets. Close a sheet of paper in the door. If it slides out easily in several places, the gasket may not be sealing properly.
8. Check the interior air vents. Food containers should not block the vents between the freezer and refrigerator compartments.
9. Look for heavy frost on the freezer’s back wall. A thick layer of ice often points to a defrost problem rather than a compressor problem.
10. Protect perishable food. If the refrigerator has been warm for an extended period, move temperature-sensitive food to a safe cold location while the problem is evaluated.

The Symptoms and What They Usually Mean

Freezer Cold but Refrigerator Warm

This pattern usually points to an airflow problem. The evaporator fan may not be moving cold air, the air damper may be stuck, or a return vent may be blocked by ice or food.

A freezer can remain cold while the refrigerator section warms because the two compartments depend on controlled airflow. A technician may test the fan, damper, vents, and defrost system.

Nothing Is Cold and the Compressor Is Silent

If the lights and controls work but there is no cooling and the compressor is silent, possible causes include a failed start relay, control board, or compressor.

A technician will test whether power is reaching the compressor and whether the compressor windings respond correctly. Replacing a control or start component is generally less expensive than replacing the compressor.

Both Sections Are Warm, but the Compressor Is Running and Hot

When the refrigerator and freezer are both warm while the compressor runs continuously and feels unusually hot, the issue may be in the sealed system. Low refrigerant from a leak or a failing compressor can prevent proper cooling.

This is not a repair to perform without the right equipment. Sealed-system testing requires specialized tools and proper refrigerant handling.

Ice on the Back Wall of the Freezer

A solid layer of frost or ice on the freezer’s back wall often indicates a defrost system failure. The defrost heater, thermistor, or related controls may not be removing frost from the evaporator.

As ice builds, it restricts airflow and can make the refrigerator compartment warm even though the compressor is operating.

Water Pooling Under the Crisper Drawers

Water under the crisper drawers commonly indicates a clogged defrost drain. Meltwater cannot flow away properly, so it collects inside the refrigerator.

Drain clearing is usually a simpler repair than sealed-system work, but the blockage should be handled carefully to avoid damaging internal parts.

Loud Clicking Every Few Minutes

Repeated clicking from the back of the refrigerator can mean the compressor is trying and failing to start. A defective start relay can cause this symptom, but the compressor itself may also be failing.

Do not keep resetting the refrigerator repeatedly. Continued failed start attempts can place additional stress on the electrical components.

The LG Compressor Issue in Plain Language

Some LG refrigerator models use a linear compressor. Compressor failures on certain models have been widely reported and have been addressed through class-action settlements, extended warranty programs, and other manufacturer support programs.

This does not mean that every LG refrigerator has a defective compressor. It means that the model, serial number, purchase date, and failure history may affect your coverage options.

In practical terms:

• Compressor work is usually an expensive repair.
• Service may be handled through LG’s own service network rather than an independent repair company.
• The compressor part may have separate coverage from labor, refrigerant, or other sealed-system work.
• Some models may qualify for extended coverage or special programs.
• Coverage terms can change by model and production period.

Before paying out of pocket, locate your model and serial numbers and check the current information through LG warranty information or LG refrigerator warranty documentation. You can also ask LG whether your specific unit qualifies for an extended compressor or sealed-system program. Verify the coverage directly rather than relying on a general statement about LG refrigerators.

What a Technician Actually Tests

A qualified technician may inspect or test:

• Evaporator fan operation
• Air damper movement
• Defrost heater
• Defrost thermistor
• Defrost drain
• Condenser fan
• Condenser coils
• Compressor start relay
• Main control board
• Sealed-system pressures and cooling performance

The goal is to identify the actual cause instead of replacing parts based only on a symptom. For example, a warm refrigerator may be caused by a fan, ice blockage, control problem, or compressor issue. These repairs have very different costs.

What It Typically Costs

General repair pricing varies by appliance model, parts availability, labor rates, and warranty status. Typical US planning ranges include:

• Diagnostic visit: About $80–$150
• Evaporator fan: About $150–$400
• Air damper: About $150–$350
• Defrost heater or thermistor: About $100–$300
• Defrost drain clearing: About $100–$250
• Condenser cleaning: About $80–$180 when performed as a separate service
• Start relay: About $100–$250
• Main control board: About $200–$800
• Sealed-system or compressor replacement: About $500–$1,200 or more

These are general ranges, not a quote. LG warranty coverage may reduce the cost of the compressor part, but labor and other sealed-system charges may still apply. Ask what the warranty covers before authorizing work.

Compressor replacement is the classic repair-versus-replace decision because it is the highest repair tier and may approach the cost of a new refrigerator.

Repair or Replace?

A common rule is to repair when the cost is less than about 50% of the price of a comparable replacement. Also consider the refrigerator’s age. A typical refrigerator lasts about 13 years, although maintenance, use, and model quality affect its service life.

Repair is usually worth pursuing when:

• The refrigerator is relatively young.
• The problem is a fan, gasket, drain, relay, or defrost component.
• The unit has extended compressor coverage.
• The interior and other major components are in good condition.
• The repair estimate is well below replacement cost.

Replacement may make more sense when:

• The refrigerator is older and out of coverage.
• The compressor or sealed-system repair is near the appliance’s current value.
• The unit has had repeated cooling failures.
• Several major components need attention.
• Energy performance, storage needs, or reliability have become concerns.

A young LG refrigerator with compressor coverage is usually worth having evaluated. An older, out-of-coverage unit with a major sealed-system failure deserves a careful cost comparison.

How to Help Prevent Cooling Problems

You can reduce avoidable refrigerator problems by:

• Cleaning the condenser coils every 6 to 12 months.
• Keeping proper clearance around the refrigerator.
• Making sure the unit is level and the doors close correctly.
• Avoiding overloading the refrigerator or blocking internal air vents.
• Checking door gaskets for gaps, cracks, or loose sections.
• Addressing heavy frost, unusual clicking, or rising temperatures early.

Do not ignore a refrigerator that is only slightly warm but still operating. A unit that is “limping along” may become a complete no-cooling failure, increasing food loss and repair costs.

Need LG Refrigerator Repair?

Appliance Velocity provides fast, reliable LG refrigerator repair and refrigerator repair service for major makes and models. Our skilled technicians arrive promptly, diagnose the problem carefully, and work efficiently to restore safe, dependable cooling.

If your refrigerator is not cooling, contact us for professional service and a clear repair recommendation. Schedule appliance repair with Appliance Velocity.