LG Refrigerator Not Cooling? A Troubleshooting Guide

Why Your LG Refrigerator Stopped Cooling

You open your LG refrigerator expecting cold milk and fresh vegetables, but instead you’re met with lukewarm air and the sinking feeling that something’s seriously wrong. Before you panic and start pricing new appliances, know that most LG refrigerator cooling issues have identifiable causes—and many homeowners in Grand Rapids can diagnose the problem themselves.

LG refrigerators are generally reliable appliances, but when they stop cooling properly, it’s usually due to one of several common culprits. Let’s walk through the most likely causes and what you can do about them.

Check the Basics First

Before diving into complex diagnostics, eliminate the simple possibilities:

Is the refrigerator getting power? Check that it’s plugged in securely and that the outlet works. Test the outlet with another appliance or plug a lamp into it.

What’s the temperature setting? Someone may have accidentally adjusted the temperature dial or digital controls. LG refrigerators should be set to 37°F for the fresh food section and 0°F for the freezer.

Are the vents blocked? Both inside the refrigerator and freezer, air vents need clear space. Overpacking your fridge—especially after a Costco run—can block airflow and prevent proper cooling.

Is the door sealing properly? A worn or dirty door gasket lets warm air in constantly. Try the dollar bill test: close the door on a dollar bill and try to pull it out. If it slides out easily, your gasket may need replacing.

The Condenser Coils Are Dirty

This is the most common reason LG refrigerators stop cooling effectively, and thankfully, it’s one of the easiest to fix yourself.

The condenser coils, typically located at the back or bottom of your refrigerator, release heat from inside the unit. When they’re covered in dust, pet hair, and kitchen grime, they can’t dissipate heat efficiently. Your compressor works harder, your electric bill goes up, and eventually cooling performance suffers.

How to clean them: Unplug the refrigerator, locate the coils (you may need to remove a lower grille panel), and use a coil brush or vacuum with a brush attachment to gently clean them. Many West Michigan homes with pets need this done every 3-4 months rather than the standard 6-12 months.

Evaporator Fan Problems

The evaporator fan circulates cold air throughout your refrigerator. When it fails, you’ll typically notice the freezer stays cold while the fresh food section warms up.

How to diagnose: Open the freezer door and listen. You should hear a fan running. If it’s silent, manually trigger the door switch (usually a small button or lever that the door presses). If the fan still doesn’t run, you likely have a failed evaporator fan motor.

The fix: Replacing an evaporator fan motor costs $150-300 for parts and labor. The part itself runs $50-100, but accessing it requires removing freezer shelves and panels—a job that takes experience to do without damaging clips and connectors.

On LG models, error code “Er FF” often indicates evaporator fan failure, though not all models display this code.

Defrost System Failure

LG refrigerators use an automatic defrost cycle to prevent ice buildup on the evaporator coils. When this system fails, ice accumulates and blocks airflow, preventing proper cooling.

Symptoms of defrost failure:

• Frost or ice buildup on the back wall of the freezer
• Freezer works but refrigerator doesn’t cool
• Clicking or buzzing sounds from the freezer
• Error codes like “Er dH” (defrost heater error)

The defrost system has three main components: the defrost heater, defrost thermostat, and defrost timer (or control board on newer models). Testing these requires a multimeter and some technical knowledge.

The fix: Professional repair costs typically run $200-400 depending on which component failed. The defrost heater itself costs $30-60, but diagnosis is critical—replacing the wrong part wastes money.

Compressor Issues

The compressor is your refrigerator’s heart—it pumps refrigerant through the system. Compressor problems are less common but more serious.

Signs of compressor trouble:

• Refrigerator runs constantly but doesn’t cool
• Loud humming, clicking, or buzzing from the back
• Compressor feels hot to the touch
• Error code “Er CO” on digital models

Unfortunately, compressor replacement on an LG refrigerator costs $400-800, sometimes more. At that price point, many homeowners in Michigan consider whether a newer, more efficient model makes more financial sense, especially if the refrigerator is 8+ years old.

Important note: Some 2019-2020 LG refrigerators with linear compressors have known issues. LG settled a class-action lawsuit and extended warranties on affected models. If your LG is from this era, check if you’re covered before paying for repairs.

Start Relay Failure

The start relay helps the compressor turn on. When it fails, you might hear clicking sounds as the compressor tries to start but can’t.

How to test: Unplug the fridge, locate the start relay (attached to the compressor at the bottom back), and shake it. If you hear rattling, it’s likely failed. A working relay shouldn’t rattle.

The fix: Start relays cost $15-30 and are relatively easy to replace yourself if you’re handy. Professional replacement runs $100-150 including the service call.

Temperature Control Thermostat Problems

The main control thermostat signals when the compressor should run. When it fails, temperature regulation becomes erratic or stops entirely.

Testing: Turn the thermostat from low to high while listening for a click. No click suggests failure. However, proper diagnosis requires testing with a multimeter.

The fix: Thermostat replacement costs $150-250 professionally. The part runs $40-80.

When to Call a Professional

While checking power, cleaning coils, and inspecting door seals are DIY-friendly, most other repairs require specialized tools and knowledge. Refrigerant work legally requires EPA certification, and misdiagnosing electrical components can lead to expensive mistakes.

If you’ve checked the basics and your LG refrigerator still isn’t cooling, it’s time to call in an expert. A qualified technician can accurately diagnose the issue, often within minutes, saving you the cost of buying and installing the wrong parts.

Don’t Let Your Food Spoil

A refrigerator that’s not cooling is more than an inconvenience—it’s a food safety issue and a potential money pit if the problem damages other components.

If your LG refrigerator isn’t cooling and you’re in the Grand Rapids or West Michigan area, HomeHalo Appliance Repair can help. We diagnose and fix LG refrigerator problems quickly, with transparent pricing and a commitment to getting your appliance working right the first time. Call us at (616) 367-5131 to schedule same-day or next-day service.