The situation when your LG refrigerator stops freezing always takes you by surprise. This is not just a household inconvenience, but a direct threat to the safety of food and the financial budget, since the contents of the cells can deteriorate in a matter of hours. Primary panic is a natural reaction, but it is at this moment that it is important to maintain composure and act consistently.
Before calling a service center or looking for a repairman on the bulletin board, it is worth doing your own research. primary diagnostics. In a significant percentage of cases, the problem lies not in the breakdown of expensive components, but in banal operating errors or electronic failures that can be easily fixed on your own.
In this article we will analyze the main reasons why LG refrigerator may stop gaining temperature, and we will offer specific algorithms for solving problems for various models, including systems No Frost and classic crying evaporators.
Primary diagnostics and power check
The very first step, which is often ignored, is checking basic things. If LG refrigerator it hums, but does not freeze, or is completely silent, you need to make sure the integrity of the electrical circuit. Sometimes the problem lies in oxidized socket contacts or a damaged power filter.
Check whether the power indicator on the control panel is on. If the display is not active, try plugging the unit into a different outlet, preferably in an adjacent room, to rule out wiring problems at that particular point. Also inspect the power cord for kinks or traces of rodents, which is especially important for equipment standing on the floor.
If the indicators are on, but there is no cold, listen to the operation of the compressor. Starting the engine should be accompanied by a characteristic hum and slight vibration of the housing. If you hear only a quiet click, followed by a hum that lasts 2-3 seconds, followed by another click and silence, this is a sign of a starting attempt that is unsuccessful.
⚠️ Attention: If you hear a loud cracking sound or smell a burning smell when you try to start the compressor, immediately unplug the unit! Further operation may lead to a fire in the wiring or complete failure of the electrical circuit.
It is also important to check the temperature settings. Accidental pressing of buttons by children or during cleaning could put the refrigerator into Eco or “Vacation” mode, where the temperature is maintained at the minimum required level, which is not sufficient for freezing. Return the values to standard: usually this is +3...+5°C for the refrigerator compartment and -18°C for the freezer.
Problems with the No Frost system and ice
Modern models LG are often equipped with a system No Frostthat prevents ice formation. However, if this system fails, the evaporator may become overgrown with a “fur coat” that blocks the circulation of cold air. As a result, the compressor works continuously, trying to cool the chambers, but the air simply does not reach the products.
The main reason for this phenomenon is a malfunction of the defrost system. The heater heating element, defrost sensor or timer may fail. Visually, this manifests itself in the form of ice on the back wall of the freezer or in a niche behind the plastic panel. The control unit “does not see” the ice or cannot melt it, and the circulation stops.
In such cases, the first aid method is complete defrosting. It is necessary:
- ❄️ Completely defrost the refrigerator for at least 24 hours (preferably 30-36 hours).
- 🔌 Disconnect the appliance from the power supply for the entire defrosting period.
- 🚪 Keep the doors open to allow warm air to enter.
- 🧹 Remove all water and wipe the internal surfaces dry.
After turning on, let the refrigerator operate for 5-7 hours without loading food. If the cold appears and persists, and after 1-2 weeks the situation repeats, the problem is guaranteed to be in the defrosting system (the heating element is burnt out or the sensor is “stuck”).
⚠️ Attention: Never use a hairdryer, hot water or sharp objects to chip ice inside the chamber No Frost. Mechanical damage to the evaporator or plastic air ducts will lead to expensive repairs or leakage of freon.
Malfunctions of the compressor and starting relay
If defrosting did not help, and the refrigerator hums intermittently or does not start at all, attention should be switched to the “heart” of the unit - compressor. LG refrigerators often use linear inverter compressors, which are quiet and energy efficient, but require high-quality electronics to control.
The start relay is a device that provides the initial impulse to start the engine. If it burns out, the compressor will not be able to start working, even if the motor itself is working. A symptom of a relay malfunction is a characteristic click, after which the refrigerator goes silent, or an attempt to start that lasts several seconds.
In LG linear compressors, a frequent problem is the failure of the inverter board, which controls the shaft speed. This is a complex electronic unit that cannot be easily repaired “on the knee” and requires replacement or professional re-soldering of components.
You can check the operation of the compressor visually and by ear, but an accurate diagnosis of the pressure in the system can only be carried out by a specialist with a pressure gauge station. However, if you feel that the compressor housing (the round “tank” at the bottom back) is absolutely cold or, conversely, hot to the point where you cannot touch it, this is a sign of a serious malfunction.
☑️ Compressor diagnostics
Refrigerant leak and capillary system clogged
One One of the most unpleasant reasons why LG refrigerator it does not freeze is a freon (refrigerant) leak. Freon is a working fluid that circulates through the system, transferring heat. If the tightness of the circuit is broken (for example, due to corrosion of the evaporator tubes or mechanical damage), the gas escapes and cooling becomes impossible.
Symptoms of a leak often appear gradually. First, the refrigerator begins to freeze worse, then the compressor starts working almost non-stop, trying to compensate for the lack of cold. Ultimately, even working 24/7, it cannot reach the desired temperature, and the condenser (the grill at the back or the side walls) remains only partially warm or cold.
A clogged capillary tube is a mechanical obstacle to the freon flow. An ice plug (due to moisture) or clogging with oil oxidation products may form in the system. At the same time, the compressor hums, the discharge pressure increases, but there is no refrigerant circulation, and there is no cold in the chambers.
| Symptom | Probable cause | Nature of compressor operation | Temperature capacitor |
|---|---|---|---|
| The refrigerator is silent | No power / faulty relay | Does not work / Clicks | Cold |
| Works without stopping | Freon leak / Clogged | Constant hum | Partially warm or cold |
| Little freezing | Sensor malfunction / No Frost | Cyclic | Warm |
| Beeps and turns off | Compressor wedge / Starting | Short beeps | Can't keep up warm up |
Diagnostics of a leak or blockage requires the use of specialized equipment: leak detectors, nitrogen for pressure testing and a vacuum pump. It is almost impossible to independently find the location of the leak “by eye”, since freon is colorless and odorless, and the soldering points can be hidden in the polyurethane foam of the housing.
Is it possible to refill the refrigerator yourself?
Independent refilling with freon without evacuation of the system and replacing the filter-drier will lead to a quick failure of the compressor building. Moisture and air will remain in the system, which will cause the formation of an ice plug and oxidation of the oil.
Failures in the operation of electronics and sensors
Modern ones LG refrigerators are stuffed with electronics. Thermistors (temperature sensors), which are located in the refrigerator and freezer compartments, as well as on the evaporator, are responsible for the temperature regime. If sensor lies and sends a signal to the (control module) that “there is enough cold”, the compressor simply will not turn on, although in reality it is warm there.
A frequent problem is broken sensor wiring or oxidation of contacts in connectors, especially in conditions of high humidity. The control board itself may also fail, which stops correctly processing signals or supplying voltage to the actuators (compressor, fans, heating elements).
A reboot sometimes helps to reset electronics errors. Try unplugging the refrigerator for 15-20 minutes. This will allow the capacitors on the board to discharge and the microprocessor will perform a Hard Reset. After turning on, check to see if the display shows a malfunction (frequently flashing indicators or error codes).
If an error code appears on the display (for example, a flashing “Ice Plus” indicator or a combination of letters), decipher it according to the instructions for your model. Error codes LG often point directly to the problem unit: sensor breakage, fan malfunction or problems with the inverter.
When a call is necessary master
Despite the desire to save money, there are situations where the intervention of an unqualified user can only do harm. If you have checked the power supply, defrosted it, made sure the seals are intact, but LG refrigerator it still doesn’t freeze - it’s time to call the specialists.
This is especially true for work related to the “refrigeration circuit”. Opening the system, soldering pipes, replacing the compressor or refilling with freon requires a license, special tools and knowledge. An attempt to do this yourself is fraught with fire, poisoning by insulation combustion products or final damage to equipment.
Also, a master is needed if:
- 🛠️ The compressor needs to be replaced or repaired.
- 💨 A freon leak is detected (you need to find a place to solder, vacuum, fill).
- ⚡ The control board is faulty (component diagnostics are needed, not just replacement).
- ❄️ The problem repeats after defrosting (the defrosting system is faulty).
A professional technician will conduct a full diagnosis and check the pressure in the system, the compressor current and the tightness of the circuit. This will allow you to accurately name the reason and cost of the repair, avoiding the purchase of unnecessary spare parts.
⚠️ Attention: When calling a specialist, always check whether the cost of the work includes a warranty on components and labor. Repairing refrigeration equipment is a complex process, and the warranty should be at least 6-12 months.
Is it worth replacing an old refrigerator with a new one?
If your LG refrigerator is more than 10-12 years old and requires a compressor replacement or circuit repair, it is often more economically feasible to buy a new model. Old refrigerators consume more energy, and it becomes more difficult to find spare parts for them.
Prevention and operating rules
In order LG refrigerator to serve for a long time and not fail at the most inopportune moment, it is important to follow simple operating rules. Regular defrosting (even for the No Frost system, at least once a year), cleaning the drainage hole and checking the door seals will prolong the life of the unit.
Do not overload the shelves with food and do not put hot food inside. This puts excess stress on the compressor and defrost system. Also make sure that the refrigerator is level, and that the gap between the back wall and the kitchen wall is at least 5-7 cm for normal ventilation of the condenser.
Following these recommendations will help avoid most breakdowns and keep your food fresh for many years. Remember that timely maintenance is cheaper than major repairs or buying new equipment.
Frequently asked questions (FAQ)
Why does the LG refrigerator hum, but does not freeze after defrosting?
If the cold does not appear after 24 hours of defrosting, the problem is probably not ice freezing. Possible reasons: freon leak, compressor malfunction (does not build up pressure) or breakdown of the defrost system (heater or sensor burnt out). Diagnostics by a technician is required.
What does the flashing indicator on the LG panel mean?
Flashing temperature indicators or special symbols (for example, “Ice Plus”) usually indicate a malfunction. This could be a temperature sensor error, fan problems, or inverter malfunctions. The specific code should be looked at in the instructions for your model.
Is it possible to use a refrigerator if it does not freeze well?
You can use such a refrigerator temporarily, but it is not recommended. The compressor operates in increased mode, which leads to its overheating and rapid failure. In addition, under conditions of elevated temperature, bacteria actively multiply in the chamber, which is dangerous for products.
How long should a new LG refrigerator reach its temperature?
After the first turn on or long-term transportation, an LG refrigerator requires 2 to 6 hours to reach operating temperature in empty chambers. Complete cooling of the volume loaded with food can take up to 24 hours.
Why does ice freeze in the LG refrigerator if it is No Frost?
In the No Frost system, ice should not be visible. If you see ice, the defrost system is not working and the evaporator (hidden behind the panel) is clogged with ice, blocking the air passages. This requires repair of the defrost system.