Sudden discovery that freezer compartment your LG refrigerator has stopped performing its functions can become a serious problem that threatens the safety of products. The ice melts, the meat defrosts, and a puddle forms at the bottom - these are classic signs of a malfunction that requires immediate attention. Owners are often faced with a situation where the compressor is running, but there is no cold, or the unit is completely silent.
The reasons for this behavior of the equipment can vary from a banal overload of the electrical network to a complex factory defects cooling system. Modern LG models, especially those equipped with inverter compressors and system Linear Cooling, are sensitive to voltage drops and operating conditions. Understanding the principles of operation will help you quickly determine the source of the problem and decide whether a call to the technician is required or simple manipulations are sufficient.
In this article we will analyze in detail the main failure scenarios that are typical for different series of refrigerators of the Korean brand. You will learn how to carry out primary diagnostics, what to look for first and what mistakes users make, aggravating the situation. The critical factor is often a leak in the circuit, which is visually invisible, but completely stops the circulation of the refrigerant.
Primary diagnostics: checking power supply and settings
Before you panic and look for a service center, you need to eliminate basic errors. Often, users accidentally change the temperature settings or forget that after defrosting, the refrigerator takes time to return to operating mode. Check whether the power indicator on the control panel is lit LG Electronics.
Make sure that the plug is firmly inserted into the outlet and that the cable itself is not damaged. Sometimes the problem lies in a power surge that may have blown a fuse or activated the compressor's protection. If an error appears on the display or the indicator flashes, refer to the instructions to decipher the fault code.
- 🔌 Check the integrity of the power cord and the reliability of the contact in the outlet.
- ❄️ Make sure that the “Vacation” or “Eco” mode, which reduces power, is not activated in the settings.
- ⏳ Give the refrigerator 4-6 hours of operation after turning it on to set the temperature.
Pay attention to the position of the temperature regulator. On some manually controlled models, the slider may have moved to the Minimum position. For electronic panels, make sure that the correct temperature is set, usually -18°C or -20°C for the freezer.
Problems with the No Frost system and freezing of the evaporator
One of the most common reasons why LG refrigerator does not freeze in the freezer, this is a malfunction of the system No Frost. If you see a “coat” of ice on the back wall of the chamber or, conversely, it is dry there, but there is no cold, the problem most likely lies in the defrost system. Ice blocks the circulation of cold air, and it simply does not enter the chamber.
The defrost system consists of a heating element (heater), a defrost sensor and a timer or electronic control module. If any of these elements fail, the ice does not melt, builds up and blocks the air ducts. As a result, the compressor works continuously, trying to cool the chamber, but to no avail.
⚠️ Attention: Attempting to chip the ice with a knife or other sharp objects is strictly prohibited. This can lead to breakdown of the evaporator and leakage of freon, which will require expensive repairs.
For diagnostics, it is necessary to completely defrost the refrigerator. Leave the doors open for at least 24 hours (preferably two days). If, after turning on, the unit begins to freeze normally, but after 1-2 weeks the problem returns, it means that one of the components of the defrosting system is faulty.
Faults of the compressor and starting relay
The heart of any refrigerator is the compressor. LG models often use reliable inverter motors, which are quieter and more economical than conventional ones. However, they are also prone to breakdowns. If you hear a clicking sound, a buzzing sound, but the start does not occur, or the motor turns on for a few seconds and turns off, the problem is in the starting mechanism or the compressor itself.
The starting relay is responsible for starting the engine. Over time, the contacts may oxidize or burn. Replacing a relay is a relatively simple procedure that you can do yourself if you have the skills. If the problem is in the compressor itself (interturn short circuit, wedge of the piston group), the unit will need to be replaced and the system refilled with refrigerant.
Symptoms of a compressor malfunction are often accompanied by overheating of the rear radiator grille. If the engine is hot but does not start, this is a bad sign. In the case of inverter models LG Linear Inverter diagnosis is more complicated and often requires a special tester to check the control board.
- 🔊 Listen: listen for a characteristic click when trying to start.
- 🌡️ Touch: carefully check the temperature of the compressor housing (carefully, it may hot!).
- ⚡ Measure: check the voltage in the network, low voltage can prevent the powerful motor from starting.
It is important to understand that replacing a compressor is a complex technical operation. It requires evacuation of the system, precise dosage of oil and refrigerant. Self-repair in this case is not recommended, since an error will lead to rapid breakdown of the new unit.
Leakage of refrigerant (freon) and clogged capillary system
If the compressor runs smoothly, without stopping, it hums, but there is no cold in the freezer (or it is very weak), and the condenser (grid at the back) remains warm or cold, there is a high probability of leakage refrigerant. Freon can escape through microcracks in the tubes caused by corrosion or mechanical damage.
Another problem with similar symptoms is a clogged capillary tube. Oil circulates in the system, which over time can thicken or mix with breakdown products, forming a plug. In both cases, the pressure in the system drops, and the refrigerant does not have time to boil in the evaporator without taking away heat.
| Symptom | Probable cause | Nature of compressor operation | Temperature condenser |
|---|---|---|---|
| Complete absence of cold | Complete freon leak | Works constantly | Cold |
| Weak cold | Partial leak | Works without stopping | Warm only at the exit |
| There is cold, but weak | Capillary clogged | Works with overheating | Hot to the plug, then cold |
| Unstable cold | Thermostat malfunction | Rarely turns on | Changes cyclically |
It is almost impossible to diagnose a leak or blockage at home without a pressure gauge station. The technician makes a puncture in the system, checks the pressure and the presence of freon. When a leak is confirmed, a search for the location of damage is required (often using ultraviolet light or a soap solution), soldering and refilling.
Is it possible to refill the refrigerator yourself?
Theoretically, it is possible if you have equipment (vacuum pump, pressure gauges, scales). However, without professional skills, there is a high risk of under-charging or over-charging the system, which will lead to compressor failure. In addition, different types of freon (R134a, R600a) require a different approach, and isobutane (R600a) is also explosive.
Malfunctions of the thermostat and temperature sensors
In LG refrigerators, thermostats (in mechanical models) or air sensors (in electronic ones) are responsible for temperature control. If the thermostat is “stuck” in the “Off” position or its sensitive element has lost its properties, the compressor simply will not receive a signal to start. As a result, the chamber is at room temperature.
In models with electronic control (Smart Diagnosis), a whole block of sensors is responsible for the temperature regime. Failure of the evaporator sensor or the air sensor in the chamber can lead to incorrect operation. The unit may “think” that the temperature has already been reached and not turn on the cooling, or freeze until an ice block forms.
You can check a mechanical thermostat by closing its contacts directly. If after this procedure the refrigerator turns on and starts freezing, it means that the regulator is faulty and requires replacement. It is more difficult with electronic sensors: their resistance is checked with a multimeter at different temperatures and compared with reference values for a specific model.
⚠️ Attention: When replacing sensors, it is important to use original components or high-quality analogues. Cheap substitutes may have a different temperature characteristic, which will lead to incorrect operation of the entire system.
Operation errors and external factors
The reason does not always lie in the breakdown of parts. Often users themselves create conditions under which refrigerator cannot work effectively. For example, installing the unit close to a wall or in a niche without gaps for ventilation leads to overheating of the condenser and a decrease in cooling efficiency.
Loading the freezer with hot foods is another common mistake. This places a huge load on the compressor and leads to abundant condensation, which freezes and disrupts the defrost system. Also, densely filling the chamber with food blocks the ventilation holes.
- 🚫 Do not place the refrigerator next to the radiator or in direct sunlight.
- 🍲 Cool food to room temperature before putting it in the freezer.
- 🌬️ Leave a gap of at least 5-10 cm from the back wall to the kitchen wall.
Check the rubber seals on the doors. If they do not fit tightly, warm, moist air constantly enters the chamber. This leads to constant freezing and increased load on the unit. Wipe the seal and check its elasticity.
☑️ Checking the operating conditions
When you need to call a technician and professional repairs
There are a number of situations when self-repair is not only useless, but also dangerous. If you determine that the problem is related to a sealed circuit (freon leak, blockage), special equipment and a license to work with refrigerants are required. Trying to “just add gas” without eliminating the cause of the leak will solve the problem only for a short time.
It is also worth contacting specialists if the inverter compressor or electronic control module has failed. These components require accurate diagnostics and often reprogramming or selection of specific spare parts. In the case of LG refrigerators, an original control unit is often required, which is difficult to find on the open market.
Pay attention to the warranty. If your refrigerator is less than 3-5 years old (depending on the region and type of unit, the compressor warranty is often longer), opening the seals or repairing it yourself may deprive you of the right to free service.
Why does the LG refrigerator hum, but does not freeze after defrosting?
If after complete defrosting (24 hours) the refrigerator turned on, worked for a couple of days and stopped freezing again, then the problem is not in the ice, but in a malfunction of the defrosting system (the heating element, sensor or timer burned out). Ice has accumulated again and blocked the channels.
Is it possible to use a refrigerator if the freezer does not freeze?
It is not recommended to operate equipment with a malfunction. If the freezer does not freeze, this may indicate a freon leak or the compressor is operating in emergency mode. This leads to overheating and other damage to the engine, as well as spoilage of food in the main chamber.
How long should a new LG refrigerator take to reach its temperature?
After the first start-up or long-term transportation, the refrigerator requires 4 to 8 hours to reach the initial temperature. It may take up to 24 hours for food to completely freeze and reach a stable temperature. At this time, do not open the doors frequently.
What does the flashing indicator on the LG panel mean?
A flashing indicator often signals that the temperature in the chamber is rising above normal. If, after loading the products and closing the door, it does not go out after a few hours, this indicates a malfunction of the cooling system or loss of tightness.