The refrigerator is the largest and the most important of all kitchen appliances in your home. It is where you store all of your perishable food items before you prepare your meals. It is also where you store leftovers and the beverages for the family. Unfortunately, there will come a time when something goes wrong and you notice that the interior temperature is not staying where it is supposed to. Below are some common causes of why an LG refrigerator is not cooling.

Before starting with less common causes, let me tell you about one of the big issues with LG refrigerators. Its INVERTER LINEAR COMPRESSOR Failure.

These new generations of compressors on LG refrigerators didn’t prove themself as reliable. They fail very often.

So, if you have a refrigerator not cooling at all in both the freezer and fridge compartment, then you need to pull out the fridge from its place, remove back panel and hear if compressor is running. If it is running, then you have a failed compressor. Other words, its not pumping freon along the sealed system.

But the good thing is, most of these LG compressors has 10 years warranty. So check your warranty first and then call for help.

Other causes of why an LG refrigerator is not cooling properly

  • Dirty condensing coils
  • Condenser fan motor not working
  • Evaporator fan motor not working
  • Start relay failed
  • Temperature control thermostat not working

Dirty condensing coils

The most important part of the refrigerator’s cooling system is the condensing coils. The condenser is where the refrigerant is contained and the coolant is circulated inside the coils. The air inside the refrigerator flows across the condensing coils and removes the heat.

So, if you notice that the temperature inside the refrigerator is not maintaining the temperature that you selected, it is possible that there is something wrong with the condenser unit or maybe the coils are dirty.

The condenser unit is located at the bottom of the refrigerator and you will need to access it from the back of the unit. Be sure to unplug the unit from the wall and disconnect the water line if you need to move it too far.

After inspecting the condenser unit and it turns out that coils are in fact dirty, you can simply remove any debris using a stiff brush, compressed air, for really caked-on dirt you can use soapy water along with the brush. If you use water be sure that everything dries before testing it out.

Condenser fan motor not working

The key to the LG refrigerator cooling system is the circulation of cool air. A big part of that is the condenser fan which moves the air across the condenser coils which cools the air. If you suspect that airflow is being reduced or non-existant, the possibility is the fan blades are obstructed or the fan motor is faulty.

Always check to be sure that the power is off before you work on anything that uses power. First, check to be sure that the fan is turning freely and free of any debris. If everything looks good you should test the motor for continuity with a multimeter. If you determine that the motor windings are the problem you will need to contact LG and get a replacement motor.

After getting the new part to do the repairs, remove the old fan motor and then install the new fan motor. When you have the repairs done, close up all covers and reconnect the water line if necessary, plug the power cord back in and move the refrigerator back in place. Give the unit time to start the cooling process and check to see if it cooled down to the proper setting.

Evaporator fan motor not working

The evaporator fan circulates the air across the cooling coils and into the freezer and refrigerator sections of the refrigerator. In most refrigerators, there is only a single evaporator system and it is located behind the freezer section. If the air is not circulating properly it will not keep either of the sections cool enough. Always check the fan to be sure that it is spinning freely and not bound up with debris.

If the fan will not turn you are likely dealing with a bad evaporator fan motor. You can test the motor for bad internal windings using a multimeter and check for continuity. You there is an indication that the windings are the problem you will need to contact LG and get a new evaporator fan motor or BUY HERE

If you need to replace the fan motor be sure that you unplugged the power cord and disconnect the water line if necessary. Gain access to the back of the refrigerator to get at the evaporator motor. Disconnect the power leads for the motor and remove the mounting bolts that are holding the motor in place. Take out the old motor and put the new one in place and button everything back up and plug the unit in.

Start relay failed – 

In an LG refrigerator, the start relay is a very important part of the cooling system. It works in conjunction with the compressor unit of the refrigerator and if it is not working properly or not working at all it will prevent the compressor unit from working properly or not at all.

You will need to gain access to the bottom part of the refrigerator by opening the back access panels. The first thing is you need to do is pull out the refrigerator so that you can unplug it from the outlet and disconnect the water line if attached. Move the refrigerator to a position that will allow you to open the back access panels.

The start relay will be at the bottom of the unit near the compressor, using a multimeter you need to test the relay for continuity between the start and run terminals if you don’t have continuity you will need to replace the relay. Contact LG to find out about getting a new start relay . After getting the new part, replace it and button everything back up and plug the unit in and reconnect the water line if it was disconnected. Check to see if the compressor is running normally.

Temperature control thermostat not working

The thermostat is a big part of the electrical system within the LG refrigerator and it controls that flow of power to the motors (Evaporator fan, condenser fan, and compressor) that are all part of the cooling system. If it is not working properly one or more parts of the cooling system will not function.

If you suspect the temperature control thermostat is the problem you will need to gain access to the back of the unit. The thermostat will be located at the bottom of the unit and will be easy to find. A quick way to check it for operation is to turn the knob and if it clicks the thermostat it likely working. However, to be sure you will want to test it for continuity as you turn the knob.

If the thermostat is bad, you should contact LG and order a replacement part for your model refrigerator. Once you get the replacement part installed and button everything back up and reconnect the water line (if you disconnected it) and plug the unit back in and test it out.