If your LG refrigerator is not cooling as it should, there is most likely a problem with one of the refrigerator components that needs to be repaired. But before you can solve the problem, you must first find the cause.
In this article, we'll cover all the common causes so you can diagnose the culprit. This article applies to all major LG refrigerator models, including:
Check that the condenser coils are not dirty
The first point to check is the condenser coils. Their role is to dissipate heat as coolant flows through them. Sometimes they get dirty, which prevents the refrigerator from cooling properly.
To check the condenser coils:
- Turn off the wall-mounted refrigerator and pull the refrigerator out to access the back of it.
- Remove the bottom back panel and locate the coils.
- Check the coils for dirt. If they are clean, then they are not the cause of the problem, so you can proceed to the next point to check.
- But if they are dirty, clean the condenser coils well. You can use a vacuum cleaner to remove all the dust from them.
- After cleaning, put the back panel back on, put the refrigerator back in place, and then turn the power back on.
Check the condenser fan motor
The next point to check is the condenser fan motor. The fan motor's job is to draw air through the condenser coils. When it stops working properly, the refrigerator does not cool.
The condenser fan motor can be checked as follows:
- Turn off the refrigerator at the wall and pull it out to access the back panel.
- Remove the bottom back panel and first check the fan blades to make sure they spin freely.
- If you can't turn it around by hand, it's defective and needs to be replaced.
- If it rotates freely, check the continuity of the fan with a multimeter. If the motor has continuity, it is operating correctly; if there is no continuity, it means it is defective and needs to be replaced.
Check the evaporator fan motor
Another possible reason for the lack of cooling in the LG refrigerator is a faulty evaporator fan motor. Depending on the exact model of your refrigerator, there will be one or more evaporator fans. When they stop working, the refrigerator does not cool because cold air does not circulate from the freezer to the refrigerator.
To check the evaporator fan motor:
- Turn off the power to the refrigerator.
- Locate the evaporator fan motor - for single motor refrigerators it will be located in the freezer compartment.
- Remove the cover and then try turning the fan blade by hand.
- If you can't turn it all the way, it's probably damaged and needs to be replaced. If the motor makes a lot of noise during operation, this is another sign that it is damaged and should also be replaced.
- If you can turn the blade but it does not work, you should check the continuity of the motor with a multimeter. If the test shows continuity, it's fine, if not, replace it.
Test the starter relay
If you still haven't solved the problem, the next point is to check the starter relay. This component of the refrigerator works with the starter winding to ensure proper operation of the compressor. When it fails, the compressor will not work properly and the refrigerator will not cool.
You can check it by:
- Turn off the refrigerator at the power source and move the refrigerator away from the wall to gain access to the back of the refrigerator.
- Locate the starter relay. You will find it on the back of the refrigerator, behind the lower back panel that is connected to the compressor.
- Check the continuity of the starter relay with a multimeter.
- If it has continuity, it will work correctly and you can continue to check the next item. But if there is no continuity, it must be replaced. Also check for a burning smell from the starter relay. If so, it should also be replaced.
Check the temperature regulating thermostat
Another possible reason why the refrigerator does not cool is a faulty thermostat that regulates the temperature. The thermostat is responsible for directing voltage to the evaporator fan motor, the compressor and, if the refrigerator is equipped, the condenser fan motor.
The temperature regulating thermostat can be checked as follows:
- Find the thermostat in the refrigerator.
- Turn the thermostat from the lowest setting to the highest setting and see if you hear a click.
- If you hear a click, it's not broken, so move on to the next item to check.
- If you do not hear a click, check the temperature control thermostat with a multimeter. If the multimeter shows that the thermostat has no continuity, replace it.
Check the start capacitor
The start capacitor is another possible cause of the refrigerator not cooling. The start capacitor helps drive the compressor at startup, and when it is not running, the compressor will not be able to start, resulting in the refrigerator not cooling properly.
You can check it by:
- Turn off the refrigerator at the wall and pull it out to access the back panel.
- Remove the back panel and locate the start capacitor.
- Use a multimeter to check continuity.
- If there is no continuity, replace it. But if it has continuity, then it works fine.
Test the thermistor
The purpose of the thermistor is to monitor the temperature in the refrigerator and then transmit it to the control panel. Damage will cause other components in the refrigerator to not function properly.
The best way to check if it is damaged is:
- Make sure the refrigerator is turned off.
- After locating the thermistor, use a multimeter to see if the thermistor changes resistance as the refrigerator changes temperature.
- If not, the thermistor has no continuity and must be replaced. But if it does, that's fine and not the cause of the problem.
Check the compressor
The next thing to check is the compressor. The compressor is a pump that compresses the refrigerant and then circulates it through the evaporator and condenser. When it fails, the cooling system stops working as it should. This is a fairly rare cause of the problem, so check all other possible causes first.
The compressor can be checked by:
- Make sure the power to the refrigerator is off and unplug it from the wall.
- Remove the lower back panel and find the compressor.
- Use a multimeter to check continuity between the electrical contacts on the side of the compressor. If the test shows an open circuit, the compressor is likely defective and should be replaced by an experienced technician.
Check the temperature control chart
The temperature control board is another possible cause of the problem (though not common). This component supplies the necessary voltage to the compressor and fan motors and will prevent the cooling system from operating properly if it fails.
Unfortunately, testing the temperature control board is difficult, so if you've tried all the other items listed above, you should consider replacing the temperature control board and see if that fixes the problem.
Replace the main control board
If you've checked every other point above and still haven't found anything wrong, the last thing to do is replace the main control board. It is quite rare to be the cause, but it can happen.
The most common culprit is a faulty seal, which can stop the compressor from being able to run. So, if your fridge is running but not cooling, then there is a good chance you have an issue with your compressor. If this is the issue, you will need to call in a licensed technician to repair it.What is the fridge not cooling? ›
There are several causes for a refrigerator that doesn't cool, including dirty condenser coils, poor ventilation, improper installation, faulty or dirty gasket seals, unorganized food storage, appliance location and malfunctioning internal parts.What is the most common problem with LG refrigerators? ›
The most common LG refrigerator repairs are temperature issues. Check the settings and adjust if they are too low or high. Check the condenser coils for dust and debris and clean them with a vacuum. Ensure the condenser and evaporator fans are free of obstructions and spin freely.Why is my LG refrigerator not cooling but the freezer is working? ›
Faulty Refrigerator Thermistor
The lack of cool air results in your LG refrigerator not cooling but freezer works fine. If the thermistor shows a lack of continuity with multimeter testing, it's likely faulty and requires replacement.
If you can hear the compressor running but the fridge isn't cooling, the problem is most likely either frost-clogged evaporator coils or a stuck or broken evaporator fan. If you hear no sounds and the compressor isn't running, or you hear a click, inspect the overload relay, start relay, and start capacitor.Why is my true refrigerator running but not cooling? ›
One of the most common reasons for a True commercial refrigerator not cooling are dirty condenser coils. These coils help cool refrigerant, providing cool air for the refrigerator. However, accumulated dirt, dust and grease may impair the coils' function.Why is my fridge warm but freezer cold? ›
The air vents are blocked
Blocking the air vents prevents the proper flow of cold air between the freezer and fresh food sections. To fix it: We recommend keeping your refrigerator about 3/4 full for the best results. Check to see if there's anything blocking the air vents.
How many years does an LG fridge last? On average, a refrigerator typically lasts around 12 to 13 years, including models from LG.Is it worth repairing an LG refrigerator? ›
Yes, in many cases it is worth it, as a refrigerator lasts 10 to 15 years on average. Often, a repair will cost less than replacing the appliance. If the price of repairing a refrigerator is more than half the cost of buying a new one, it may be time for the homeowner to start shopping around for a new fridge.Which refrigerator has the most complaints? ›
Samsung refrigerators have been cited in hundreds of complaints to the Consumer Product Safety Commission because of unsafe temperatures and malfunctioning icemakers.
The recommended temperature setting for your refrigerator is 37 degrees, and the recommended temperature for your freezer is 0 degrees. Your LG refrigerator also gives you the option to change the temperature mode from Celsius to Fahrenheit or vice versa.How long does it take for an LG refrigerator to get cold? ›
Let your refrigerator run for at least 2 or 3 hours before putting food in it. Check the flow of cold air in the freezer compartment to ensure proper cooling. Your refrigerator is now ready for use.