The situation when the LG refrigerator continues illuminate the shelves, but the freezer stops freezing food, often takes the owner by surprise. You open the door, expecting the usual cold, but you only feel room temperature, and the ice in the compartment has begun to melt. This is a critical moment that requires an immediate response, since the safety of stocks of meat, fish and semi-finished products is at risk. In modern models with the system No Frost the problem may lie not only in the lack of cold, but also in the disruption of air circulation.
Before calling a technician, it is necessary to carry out an initial diagnosis in order to understand the scale of the disaster. Often the reason lies in trivial things that can be fixed on your own in a few minutes, without resorting to complex tools. However, ignoring the symptoms can lead to the failure of an expensive one, the replacement of which is not economically feasible in older models. Let's look at the main failure scenarios. compressor, replacement of which is not economically feasible in older models. Let's look at the main breakdown scenarios.
It is important to understand that the algorithm of actions depends on how exactly the malfunction manifests itself: the freezer does not freeze at all, the temperature is not low enough, or, on the contrary, a giant “coat” of ice has formed. LG refrigerators equipped with electronics that often signal problem with error codes on the display, if provided for by the design. Carefully monitoring the behavior of the unit in the first hours after detecting a problem will help save time and money.
Checking the operating mode and temperature settings
The very first and most obvious reason, which is often overlooked, is an accidental change in settings. Children could play with the control panel, or you yourself could touch the buttons while actively cleaning. On electronically controlled models, a power failure could result in a factory reset with the freezer temperature set to minimum cooling or Eco mode. Check the indicators on the front panel of the camera.
If you have a mechanical model, the regulator inside the camera may have moved. Make sure it is not set to minimum. For normal freezing of food, you need to set the temperature in the range from -18°C to -24°C. In some cases, turning on the Super Freeze (Super Freeze) mode for several hours helps to force the compressor to run at maximum power.
It is also worth paying attention on loading density. If the freezer is filled to the brim with food, cold air cannot circulate. In systems No Frost this is critical, since the cold is pumped by the fan. If the air channels are blocked by bags, the cold simply will not reach the sensors and the products in the depths.
⚠️ Attention: Do not load fresh, still warm products into the freezer. This causes a sharp jump in temperature and the formation of condensation, which instantly turns into ice, blocking the operation of the evaporator.
Problems with the seal and chamber tightness
The rubber seal around the perimeter of the door is the first line of defense against the cold. Over time, the rubber hardens, cracks, or simply becomes contaminated with fatty deposits, causing the door to no longer fit tightly. Warm, humid air constantly enters the chamber, which the cooling system cannot cope with. As a result, the freezer works non-stop, but the temperature inside does not drop below zero.
You can check the tightness with a simple test with a sheet of paper. Clamp the sheet of paper with the door in different places around the perimeter. If it is pulled out without resistance or falls on its own, it means that the seal is broken in this place. Often the problem is solved by thoroughly washing the seal with warm water and soap or heating it with a hairdryer if the rubber is simply deformed but has not lost its elasticity.
If the door is skewed, then even a perfect seal will not save the situation. This often happens if heavy bags have been hanging on the door for a long time or the refrigerator is not level. Adjust the legs of the refrigerator so that the body is strictly vertical and the door closes under its own weight. In models LG Door-in-Door it is also worth checking the tightness of the additional window.
Faults in the defrost system (No Frost)
For LG refrigerators with the system No Frost the most common cause of freezer failure is a failure in the evaporator defrost system. The essence of the problem is that ice accumulates on the radiator (evaporator), which is located behind the back wall of the chamber. The fan cannot blow air through this icy shell, and the cold stops flowing into the chamber. Outwardly, it looks like this: the refrigerator is humming, the light is on, but there is no cold.
The defrosting chain involves three main elements, the failure of any of which leads to icing:
- ❄️ Defrost heating element — a heating element that melts the ice; if it burns out, the ice does not melt.
- 🌡️ Defrost sensor —informs the control module that it is time to turn on the heating; if it is “lying”, the command will not be received.
- 🚿 Drainage hole - if it is clogged with debris, melt water does not leave, freezes below and blocks the operation of the system.
You can diagnose this problem by completely defrosting refrigerator. Leave it turned off with the doors open for at least 24 hours (preferably two days). If, after turning on, the freezer worked normally, but after 1-2 weeks the problem recurred, it means that the defrosting system is faulty and requires replacement of parts.
Fan failure and clogged ducts
Unlike old models, where the cold went down on its own, in modern LG a fan is responsible for circulation. If it stops spinning, cold air remains in the evaporator area, and the freezer becomes warm. There may be several reasons: freezing of the blades, ingress of a foreign object, or failure of the electric motor.
To check the fan, open the freezer and press the door close sensor (or pinch it with your finger), simulating closing. You should hear a characteristic air noise or see the movement of the blades (if you have access). If the fan hums but does not spin, it may be jammed with ice. If there is silence, the winding has burned out or there is a problem with the voltage supply.
It is also worth checking the air channels. Some models have a flap between the freezer and the main compartment that regulates air flow. If it is stuck in the closed position, the freezer can work normally, and the main compartment can defrost, or vice versa, depending on the design of the specific series GA-B or GC-B.
Freon leak and problems with the compressor
The most unpleasant situation is a refrigerant (freon) leak or malfunction compressor. Freon circulates in a closed circuit, and if a microcrack has formed somewhere (often due to corrosion or mechanical damage when defrosting with a knife), the gas evaporates. Without freon, the compressor runs idle, driving air, but not creating cold.
Signs of a leak or compressor breakdown:
- 🔇 The compressor turns on for a couple of seconds and turns off (clicks).
- 🔥 The condenser grille at the back of the refrigerator remains cold when running motor.
- 💤 The compressor runs continuously without turning off, but there is no temperature.
- 👀 Visible oil stains at the bottom of the refrigerator or in the compressor area.
In the case of with an inverter compressor, which is equipped with many LG models, diagnosis is more difficult. They work quieter and smoother, but their repair requires special equipment and skills. It is impossible to fill freon yourself or solder the tube without a vacuum pump and scales.
⚠️ Attention: If you hear a loud knock or clanging sound when starting the engine, immediately unplug the refrigerator. Operation of a faulty compressor can lead to complete combustion and damage to the wiring.
Why can’t you pierce the tubes yourself?
There is oil and freon under pressure inside the system. A puncture will result in the release of gases and the entry of moisture into the circuit. Moisture in the system is a guarantee that the refrigerator will never work normally again, as acidic compounds are formed that corrode the metal from the inside.
Diagnostics of the control module and electronics
The “brain” of the refrigerator is the electronic control module. It is he who receives signals from temperature sensors and decides when to turn on the compressor or fan. Voltage surges in the network, moisture ingress, or simply a manufacturing defect can lead to a malfunction in its operation. The electronics may “think” that the temperature has already been reached and do not issue a command to cool.
Often individual elements burn out on the control module, for example, the compressor on relay. Visually, this may look like blackening of the board or swelling of the capacitors. However, in modern LG models, the control module is often sealed in a sealed case, and its repair is possible only in specialized services.
Try rebooting the system. Unplug the refrigerator from the outlet for 15-20 minutes. This will clear errors in the controller memory. If after turning on the problem disappeared, there was a software glitch. If it happens again after a couple of days, the board needs to be replaced or flashed.
Table of main symptoms and probable causes
To simplify diagnosis, the main symptoms are summarized in a table. Find your description of the situation to narrow down the troubleshooting.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The refrigerator hums, but does not freeze | Freon leak or capillary blockage | High (needs a technician) |
| The freezer is covered with ice, there is no cold | Malfunction of the defrost system (heating element, sensor) | Medium (you can do it yourself) |
| The compressor clicks and does not start | Start relay or compressor failure | High |
| There is cold, but weak | Loose fit of the door or wear of the seal | Low (with your own hands) |
| Error code on the display | Temperature sensor or fan failure | Medium |
When you need to call a specialist
Despite the desire to save money, there are situations when self-repair is not only useless, but also dangerous. If diagnostics indicate a freon leak, it is necessary to search for the location of the leak using a leak detector, evacuate the system and accurately charge the refrigerant by weight. It is impossible to do this efficiently at home.
Also, you should not go inside if the problem concerns the electrical part of the compressor or the control board, unless you have the skills to work with a soldering iron and a multimeter. Incorrect connection of contacts may result in short circuit and fire. Remember that opening the sealed circuit will automatically void the warrantyif it is still valid.
☑️ Checklist before calling a technician
Contact authorized LG service centers or verified private workshops that provide a guarantee for their work. Be sure to check the cost of travel and diagnostics, as these rates may vary significantly in different regions. A qualified specialist will be able to accurately identify the cause of the breakdown already at the stage of the initial inspection.
Frequently asked questions (FAQ)
Why did the LG freezer stop freezing after defrosting?
Most likely, during defrosting you damaged the internal circuit (pierced with a knife or with a sharp object), which led to a freon leak. The second reason is that you turned on the refrigerator immediately, without allowing it to stand turned off. If there is water left inside, it could get into the electrics or freeze in the channels, blocking the system.
How long should an LG refrigerator recover after defrosting?
Full return to mode after a long defrost (more than 12 hours) can take from 2 to 5 hours. During this time, do not open the doors frequently or load food. If after 6-8 hours the temperature does not begin to drop, then there is a malfunction.
What does a flashing indicator mean in an LG freezer?
A flashing indicator usually signals that the temperature in the chamber is rising above normal. This can be either a temporary phenomenon (a lot of warm food has been loaded) or a sign of a breakdown. If the blinking does not stop after a day, check that the door is tightly closed and the fan is working.
Is it possible to use the refrigerator if the freezer does not work?
You can use the main compartment, but with caution. In some models, if the freezer malfunctions (for example, a freon leak), cold may not flow into the main compartment at all, or, on the contrary, it will be too cold there due to a malfunction of the damper. Monitor the temperature in the refrigerator compartment.
How to reset an error on an LG refrigerator?
Try to disconnect the device from the power supply for 15-30 minutes. This will reboot the main control module. If the error is caused by a temporary power surge, it will disappear. If the physical sensor or element is faulty, the error will appear again after a cycle of operation.