The situation when freezer compartment your LG refrigerator suddenly stops performing its function always catches you taken by surprise. The food begins to defrost, water appears on the floor, and ice forms on the walls or, conversely, they remain warm. This is not just a household inconvenience, but a signal of serious problems in the operation of a complex technical device.
Models LG No Frost and classic cooling systems have their own design features that affect the nature of the breakdown. In most cases, the cause lies in poor refrigerant circulation, electronic failure, or mechanical damage to system components. Understanding the operating principle will help you quickly navigate the problem.
Before calling a technician, it is worth conducting an initial diagnosis to eliminate common operating errors. Often users encounter false alarms due to incorrect temperature settings or camera overload. However, if you hear that compressor humming, but there is no cold, or, conversely, the silence is suspicious, the problem may be deeper.
Checking the temperature mode and settings
The first thing you need to do is check the current settings on the control panel. Perhaps one of the household members accidentally touched the buttons or the settings were lost after a power surge. The indicator Super Freeze (Super Freeze) may light up on the display, which sometimes blocks the normal operation cycle, or, conversely, the mode Eco may not be activated correctly.
Make sure that the set temperature meets the requirements for long-term storage of food. For the freezer, the optimal value is -18°C. If you see a value above -10°C on the display, the system simply does not have time to gain the required cold, especially if the chamber was completely loaded with warm products.
⚠️ Attention: Do not try to sharply lower the temperature to the minimum (-24°C and below) in the hope of “speeding up” the process. This will create an extreme load on the compressor and may lead to its final failure.
In some models of the series LG DoorCooling+ or InstaView a software failure may block the signal from the sensors. In this case, a full reset to factory settings helps. To do this, you usually need to hold down a certain combination of buttons specified in the instructions, or temporarily disconnect the device from the network for 15-20 minutes.
No Frost system malfunctions and freezing
The most common reason why LG refrigerator it does not freeze in the chamber, but still works, is the failure of the defrost system. In models with technology No Frost moisture should not turn into ice on the evaporator. If this process is disrupted, the ice coat blocks the air channels, and the cold simply does not enter the freezer compartment.
Three main elements are responsible for defrosting the evaporator: a heating element (heater), a defrost sensor and a timer (or electronic control module). If one of them breaks, ice builds up, the fan stops moving air, and the temperature inside begins to rise. You may notice that the back wall of the freezer is covered with a thick layer of frost, although visually it appears that the refrigerator is working.
Diagnosis of this problem requires partial disassembly of the back wall of the freezer. It is necessary to visually assess the amount of ice on the evaporator. If there is a monolithic block there, and the heating element is cold when the defrost mode is on, then the defrosting circuit is broken.
☑️ Diagnostics of the No Frost system
Often owners forget that clogged drainage holes also lead to problems. Water from melting ice should go into a special tray above the compressor. If the tube is clogged with debris or frozen, the water freezes in the channel, creating an ice plug that blocks the operation of the entire system.
Problems with the compressor and start relay
The heart of any refrigerator is compressor. If you hear the motor humming, clicking, but turns off after a few seconds, or there is complete silence, the problem may be with the start relay or the motor itself. Refrigerators LG often use inverter compressors, which are more sensitive to voltage changes.
The starting relay is a small plastic element that fits onto the contact of the compressor. It is responsible for starting the engine. Over time, the contacts inside the relay burn out or oxidize, and it stops delivering the desired impulse. Replacing this part is one of the simplest and cheapest repair procedures.
| Symptom | Possible cause | Sound character |
|---|---|---|
| The compressor does not turn on | Relay malfunction or thermostat | Silence or single click |
| Humming and shutting down | Compressor jammed or low voltage | Strained humming for 5-10 seconds, then clicking |
| Constant operation without shutting down | Freon leakage or wear of the piston group | Uniform hum without pauses |
If the compressor runs constantly without shutting off, but does not create the required cold, this may indicate a loss of performance. The motor drives freon in a circle, but the pressure is not enough for effective cooling. In such cases, it is often necessary to replace the entire unit, since repairing the old one may not be economically feasible.
What is an inverter compressor?
The inverter compressor in LG refrigerators does not operate at full power all the time, but smoothly regulates the rotation speed. This allows you to save energy and reduce noise levels, but makes the system more sensitive to power surges in the network.
Refrigerant leak and capillary tube clogged
When freezer stops freezing, and the compressor is operating normally (turns on and off by timer), often a freon leak or blockage is to blame. Freon is a working fluid that transfers heat. If its amount in the system decreases, the cooling efficiency drops proportionally.
Leaks in refrigerators LG most often occur in places where tubes are soldered, in the foamed part of the body (especially in the area of the freezer) or through the evaporator if it was damaged when defrosting with a knife. Signs of a leak include hot sides (instead of warm), lack of cold, and sometimes oily spots near the compressor.
Clogged capillary tube is the second common mechanical problem. Oil circulates in the system, which over time can thicken or mix with breakdown products, forming a plug. Freon cannot pass through the narrow section of the tube, and circulation stops. In this case, the filter drier is often covered with frost or, conversely, remains warm.
⚠️ Attention: Self-filling the refrigerator with freon is impossible without specialized equipment and a vacuum pump. Attempts to add gas “by eye” will lead to compressor failure.
To eliminate these malfunctions, you need to call a technician with equipment for finding leaks (leak detector), evacuation of the system and charging with the exact dose of refrigerant indicated on the nameplate of your device.
Malfunction of the thermostat and temperature sensors
Refrigerator electronics LG is controlled by many sensors. If one of them transmits incorrect data to the control module, the refrigerator behaves inappropriately. For example, the temperature sensor in the freezer may “think” that it is already -25°C and give the command to turn off the compressor, although in reality it is -5°C.
In older models, a mechanical one is used thermostat with a bellows filled with gas. When the temperature changes, the gas expands or contracts, opening or closing contacts. If the bellows has lost its tightness, the contacts will open forever and the refrigerator will stop turning on.
In modern models with electronic control (Smart Diagnosis), diagnostics are simplified. A sensor error is often indicated by a code on the display (for example, series errors r or F). Checking the resistance of the sensor is carried out with a multimeter: as the temperature changes, its resistance should change smoothly. If the device shows an open or short circuit, the part needs to be replaced.
Environmental influences and proper operation
Sometimes the reason is that LG refrigerator It freezes poorly, this is not due to a breakdown, but to operating conditions. Refrigeration equipment is designed to operate in a certain climate class. If you place a refrigerator designed for a temperate climate (SN, N) in an unheated garage in the winter or, conversely, next to a hot stove in the summer, it will not be able to work correctly.
The distance to the walls is critical. For normal air circulation around the condenser (black grille at the back), it is necessary to leave a gap of at least 5-7 cm. If the refrigerator is located close to the wall or built into a niche without ventilation, heat is not removed, the pressure in the system increases, and efficiency decreases.
It is also worth considering the volume of loaded products. If you put 10 kg of warm meat in the freezer, the compressor will work hard for days, trying to cool the chamber. In such cases, the fast freezing function may not be able to cope, and some of the food will have time to spoil.
⚠️ Attention: Do not install the refrigerator near heating radiators or in direct sunlight. Local overheating of one part of the case can throw off sensor readings and disrupt the operating cycle.
When professional repair is necessary
There are a number of symptoms in which independent repair is not only useless, but also dangerous. If you find that all the freon has left the system (for example, after picking the ice with a knife), or if the compressor makes a metallic clanging or knocking noise, it is better not to risk it. Opening a sealed circuit requires a license and special equipment.
It is also worth contacting specialists if, after defrosting within 24 hours, the refrigerator has not reached its temperature. This is a sure sign that the problem is technical and not temporary. The technicians will conduct a full diagnostic, check the tightness of the circuit and the condition of the electrical circuits.
Remember that the use of original spare parts LG guarantees the compatibility and durability of the repair. Cheap analogs may not withstand the load or work incorrectly with the electronic control module of your device.
Why can’t you store the refrigerator lying down?
When transported in a lying position, oil from the compressor may leak into the refrigerant circuit. Turning on such a refrigerator without settling (at least 24 hours) will lead to water hammer and breakdown of the compressor.
Frequently asked questions (FAQ)
Why does the LG freezer work, but does not freeze after defrosting?
If after complete defrosting (more than 24 hours) the refrigerator did not start to freeze, the problem is probably not an ice plug. There may be a freon leak, a compressor malfunction, or a sensor failure that does not give the command to start cooling.
How long should a new LG refrigerator take to reach the temperature?
After the first turn on, the refrigerator takes from 2 to 12 hours to reach operating mode and reach a temperature of -18°C in the freezer. At this time, it is not recommended to load products.
Is it possible to replace the defrost heating element yourself?
Yes, if you have skills in working with electricians and tools. However, access to the heating element often requires complete defrosting and disassembling the rear panel of the freezer, which requires care not to damage the plastic elements.
What does the flashing temperature indicator on the LG panel mean?
A flashing indicator usually indicates that the temperature in the chamber is higher than normal. This may be a consequence of recent defrosting, loading warm food, or a malfunction of the cooling system.
Why does ice freeze on only one side in the LG freezer?
Uneven freezing of ice often indicates a problem with air distribution (fan malfunction) or a local leak of freon in the evaporator, where the gas begins to boil unevenly.