LG Fridge Compressor Not Working? Here’s What to Do

If you’re opening your LG refrigerator and don’t feel that familiar cold air, the culprit might be the compressor. 

Think of the compressor as the heart of your refrigerator, pumping refrigerant through the system to keep your food at the right temperature. When it stops working, the whole cooling system struggles, the temperature increases, and your food might spoil.

This guide covers how the compressor works, why it fails, how to address the issue, and when it makes sense to call in a professional.

What Does the Compressor Actually Do?

The compressor in your LG refrigerator is a motorized pump that pushes refrigerant through coils, absorbing heat from the fridge and freezer compartments and releasing it outside the unit. When it is running correctly, you typically hear a quiet humming from the back of the fridge.

If this sound is missing and the fridge feels warm, the compressor may not be running. Unlike simpler appliances, refrigerators rely on the compressor for almost all of their cooling, so it’s crucial to diagnose the issue quickly.

Signs the Compressor Might Not Be Running

Before you conclude the compressor is broken, look for these signs: 

• The refrigerator and freezer are both warmer than usual
• Food is spoiling faster than expected
• The back or sides of the fridge feel unusually warm
• There is frost or ice buildup in unexpected areas
• There is no humming or vibration from the compressor area

Noticing one or multiple of these symptoms can help confirm that the compressor is either struggling or not working at all.

Why Your Compressor May Have Stopped

A compressor can fail for all sorts of reasons. It could be as simple as a tripped breaker, while other times it’s an actual mechanical failure. Let’s walk through the possibilities so you can figure out what’s going on.

1. Power Supply Problems

Sometimes, the cause is surprisingly simple: no electricity. Ensure your refrigerator is securely plugged in, the outlet is functioning, and the circuit breaker has not tripped. Testing the outlet with another appliance can confirm that power is reaching the unit.

2. Thermostat or Temperature Control Issues

The thermostat regulates when the compressor runs. If it malfunctions or is set incorrectly, the compressor may not start. Adjust the settings slightly colder and wait to see if the compressor engages. If the dial feels loose or unresponsive, it might need replacement. 

3. Overload Protector Activation

The overload protector safeguards the compressor by shutting it down if it overheats. High ambient temperatures, blocked airflow, or voltage fluctuations can trigger this feature. Typically, the compressor will resume operation once it has cooled down.

4. Start Relay Failure

The start relay supplies the initial electrical boost to the compressor. If it fails, the compressor cannot begin running. A clicking sound without compressor activity is often a sign of a faulty start relay, which is a common issue in many LG refrigerators.

5. Compressor Wear or Defects

Although this isn’t as common, the compressor itself can fail due to age, wear, or manufacturing defects. LG linear compressors from 2010 to 2017 were prone to early failure, and some models are covered under extended warranty or class-action settlements.

How to Fix It in 6 Simple Steps

If you are comfortable with basic appliance checks, these 6 steps should help to identify or resolve the issue:

1. Confirm the Power Supply: Make sure the fridge is plugged in and receiving electricity. Reset any tripped breakers.
2. Adjust Temperature Settings: Set the thermostat slightly colder and wait several hours to see if the compressor starts.
3. Listen for Clicking: Repeated clicking without starting usually points to a start relay problem.
4. Check Condenser Coils: Dust and debris can cause the compressor to overheat. Unplug the fridge and clean the coils gently.
5. Allow Rest Time: If the compressor has overheated, unplugging the unit for a few hours may allow it to reset.
6. Inspect the Start Relay: If comfortable, remove the relay and shake it gently. Rattling often indicates it needs replacement.

If these steps don’t fix the problem, it’s time to call in a professional appliance repair service. They’ll be able to diagnose what’s going on and repair it for you.

When to Call a Repair Technician

Certain issues, such as compressor replacement or electrical testing, require professional expertise, such as when:

• The compressor itself has failed
• Electrical components need testing or repair
• Your refrigerator is still under warranty
• You are not comfortable working with electrical parts
• Troubleshooting does not restore normal function

In these situations, it’s best to call in an appliance repair technician. They’ll make sure the repair is done safely and correctly.

How to Keep Your Compressor Running Longer

A little regular maintenance goes a long way in preventing compressor problems down the road. Here are some simple habits that can help:

• Clean the condenser coils every six months. Dust buildup makes your compressor work harder than it needs to, which shortens its lifespan.
• Give your fridge some breathing room. Make sure there’s adequate space around the unit for proper airflow.
• Don’t overstuff it. An overloaded refrigerator puts extra strain on the compressor trying to keep everything cool.
• Fix small problems early. If you notice the fridge isn’t cooling quite right, address it before it turns into a bigger issue.
• Use a surge protector. Power surges can fry electrical components, so it’s worth the small investment for protection.

Taking these steps can significantly reduce wear on your compressor and help extend your refrigerator’s lifespan.

Most compressor issues can be fixed with some basic troubleshooting, but don’t hesitate to call a pro if you’re unsure. It’s better to catch problems early than risk losing a fridge full of food.