The situation when a loved one LG refrigerator suddenly stops maintaining the set temperature can take any home cook by surprise. Products begin to deteriorate, an unpleasant odor appears in the chambers, and condensation or, conversely, an ice crust is visible on the walls. Understanding why unit it behaves incorrectly is the first step to saving the contents and restoring the functionality of the equipment.
Often owners panic ahead of time, assuming a costly breakdown of the compressor, whereas the problem may lie in a simple overload or electronics failure. Modern models equipped with a complex control system that may make errors or require a reboot. In other cases, we are talking about mechanical damage or natural wear of parts, requiring the intervention of a specialist.
In this article we will analyze in detail all the possible reasons why LG refrigerator it freezes poorly, and we will offer an algorithm of actions for self-diagnosis. You will learn to distinguish simple malfunctions from serious breakdowns in order to make the right decision about calling a specialist or doing the repair yourself. Remember that a timely reaction helps to avoid defrosting the entire supply of food.
Violation of the rules for operating and loading chambers
Before looking for a breakdown in internal componentsit is necessary to exclude the human factor. Often the reason that refrigerator poorly holds the cold lies in improper operation. If you have just placed a large pot of hot soup or freshly purchased products from the market in the chamber, the compressor may simply not be able to cope with the sharp increase in temperature inside the volume.
Another common mistake is violation of air circulation rules. In models with the No Frost or Total No Frost system, air flows should freely wash the products. If the shelves are packed to capacity and the ventilation holes are blocked with bags, the cold will not be able to be evenly distributed throughout the chambers.
Check the tightness of the sealing rubber. If the door does not close properly due to crumbs, ice, or cuff deformation, warm air constantly enters. In this case, the compressor works hard, trying to compensate for heat loss, but often goes into overheating and turns off due to a timer or protection.
⚠️ Attention: Never put hot foods in the refrigerator. This not only disrupts the temperature regime, but can also lead to melting of the plastic shelves and increase the load on the motor-compressor, reducing its service life.
To quickly check the tightness, you can use a simple sheet of paper. Clamp it with the door around the perimeter: if the paper comes out without resistance, it means that the seal in this place requires replacement or cleaning. It is also worth checking whether the door itself is warped due to improper installation or loose hinges.
Problems with the defrost system and ice freezing
If your LG refrigerator belongs to the No Frost system, but ice has begun to form on the back wall or bottom of the chamber, this is a sure sign of a malfunction of the defrost system. In normal operation, the evaporator is hidden behind a plastic panel, and the user should not see the frost. The appearance of snow indicates that the condensate does not have time to flow into the drainage or does not evaporate.
The main culprits here are often the Defrost heating elementdefrost sensor or timer. If the heating element burns out, ice freezes on the evaporator, blocking the fan from working. As a result, cold air simply does not enter the main chamber, although the compressor can hum properly.
- ❄️ Symptom: The fan hums, but does not spin due to an ice plug.
- ❄️ Symptom: Visible on the back wall “snowdrift” or ice crust.
- ❄️ Symptom: The refrigerator is freezing, but the temperature is above normal (+5...+8°C).
To eliminate the problem, it is often necessary to completely defrost the unit within 24 hours. This will allow the ice to melt and clear the channels. However, if after switching on the problem returns after 1-2 weeks, it means that one of the elements of the defrost circuit has failed and requires replacement by a technician.
Why does ice block the fan?
In No Frost systems, the fan takes air from the freezer and drives it into the refrigerator compartment through special channels. If the evaporator becomes covered in ice, these channels become blocked and air flow stops. The fan continues to run idle or stops due to increased ice resistance.
Malfunctions of the compressor and start relay
Compressor are the heart of the refrigerator, and if it does not work correctly, then there will be no cold. LG refrigerators often use inverter compressors, which are quiet and energy efficient. However, they are sensitive to power surges and can fail.
If you hear the motor trying to start, making a click, humming for a few seconds and then stopping, most likely the problem is in the start relay or the compressor itself. A relay is a small plastic element that fits onto the motor contacts. It can burn out from overload, and its replacement is inexpensive.
In the case of an inverter compressor, diagnostics are more difficult. It doesn't make loud clicks, but picks up speed smoothly. If the control board (inverter) gives an incorrect signal, the motor may not start or operate at low speeds, not creating sufficient freon pressure in the system. Diagnostics is more difficult with an inverter compressor. It doesn't make loud clicks, but picks up speed smoothly. If the control board (inverter) sends an incorrect signal, the engine may not start or may operate at low speeds, not creating sufficient freon pressure in the system.
| Symptom | Possible cause | Solution |
|---|---|---|
| Beeps for 5-10 seconds and turns off | Faulty starting relay | Replacement of relay |
| Silent, light is on | Compressor or board burnt out | Diagnostics by a master |
| Works constantly, without turning off | Freon leakage or wear | Searching for leaks, refueling |
| The motor housing gets very hot | Overload or wedge | Checking the cooling system |
☑️ Primary diagnostics of the compressor
Leakage of refrigerant (freon) and system blockage
One of the most unpleasant reasons why LG refrigerator It doesn’t freeze well, there is a refrigerant leak. Freon circulates in a closed loop, and if a microcrack forms in the tubes or connections, the gas gradually evaporates. Without a sufficient amount of working fluid, heat exchange is impossible.
Often leaks occur in places where tubes are soldered or in the foamed part of the body due to corrosion. Signs of a leak are: weak cold in the freezer, hot sides of the cabinet (instead of warm), and lack of cold when the compressor is running. In some cases, oily spots may appear on the floor under the refrigerator, since freon circulates along with the oil.
Another problem is clogged capillary tube. An ice or mud blockage could form in the system, preventing the movement of freon. The pressure in the system drops and cooling stops. It is impossible to eliminate a leak or blockage on your own: you need to evacuate the system, find the location of the damage, solder and refill with refrigerant.
⚠️ Attention: If you suspect a freon leak, do not try to simply add gas. It is necessary to find and repair the leak, otherwise the problem will recur in a short time. Working with refrigerants requires a license and special equipment.
Sometimes users confuse a leak with a malfunctioning thermostat. To differentiate the problem, pay attention to the operation of the motor. If there is a leak, it can run almost non-stop, trying to gain temperature, but to no avail. If clogged, the operation will also be ineffective, but the nature of the noise may change.
Failures in the operation of electronics and sensors
Modern LG refrigerators are crammed with electronics. Temperature is monitored by sensors (thermistors) that transmit data to the control module. If the sensor “lies” or fails, the board may receive incorrect signals about the temperature in the chamber and not turn on the compressor.
For example, if the fridge compartment sensor shows that it is +2°C (although in fact +10°C), the control module “thinks” that the cold is enough and does not give a command to cool. As a result, the products deteriorate, and the display may not even show an error if the diagnostics did not reveal an open circuit.
- 🔌 Evaporator sensor: Controls the defrosting process.
- 🔌 fridge compartment sensor: Adjusts the switch on compressor.
- 🔌 Freezer chamber sensor: Responsible for the super-freezing mode.
Failures in the control board itself are also possible due to power surges in the network. In this case, the refrigerator may behave chaotically: turn on and off spontaneously, not respond to buttons, or show error codes on the display (for example, rF, Er FF, Er FS).
Diagnostics by models and error codes
LG refrigerators are equipped with a self-diagnosis system that displays error codes on the display (if there is one) or is signaled by blinking indicators. Deciphering these codes is the fastest way to understanding the problem. For example, the code rF indicates problems with defrosting, and Er FF indicates a malfunction of the freezer fan.
For models without a display (where the temperature is controlled by a “knob” inside), diagnostics are more difficult. Here you need to rely on indirect signs: how often the engine turns on, whether there is ice, whether the sides are heated. Series models DoorCooling+ or InstaView may have their own specific nuances associated with additional fans or backlighting.
If you see an error code, write it down and check the instructions. Often the error does not indicate the broken part itself, but the node where the anomaly was detected. For example, a fan error may occur due to the fact that it is jammed with ice, and not due to the combustion of the winding.
⚠️ Attention: Specifications and error codes may vary depending on the year of manufacture and the specific series of the refrigerator. Always check the official instructions for your model, as the interpretation of the codes may vary.
Frequently asked questions (FAQ)
Why does the LG refrigerator hum, but does not freeze?
If the compressor hums, but there is no cold, it is more likely In general, there has been a freon leak or a blockage in the system. It is also possible that the compressor works, but does not create the required pressure due to wear on the valves. In rare cases, the problem is a non-working fan that does not circulate cold air.
What to do if there is ice in the freezer and heat in the refrigerator?
This is a classic sign of a malfunction of the defrost system (No Frost). Ice has clogged the channels through which cold air should flow into the upper chamber. Try defrosting the refrigerator completely (24 hours). If after switching on the situation repeats after a couple of weeks, you will need to replace the defrost heating element or sensor.
Is it possible to replace the seal on the door of an LG refrigerator yourself?
Yes, it is possible. The sealing rubber is usually mounted in a special groove or on screws (depending on the model). The main thing is to carefully remove the old tape, clean the groove from dirt and grease, and before installing the new rubber, warm it with a hairdryer or hold it in warm water so that it becomes elastic and straightens.
How often do you need to defrost the LG No Frost refrigerator?
Technically, the No Frost system does not require regular defrosting to remove ice, since it is removed automatically. However, manufacturers recommend turning off the refrigerator at least once a year (or once every 6 months), washing it and letting it “rest.” This extends the life of the compressor and allows you to clean the drainage holes.
Why does the back wall of the refrigerator become covered with water?
In drip systems, this is normal during the defrost cycle. There should be no water in No Frost systems. If there is water on the chamber floor or under drawers, the drain hole may be clogged. It can be cleaned with a special flexible brush or soft wire, pouring a little warm water into it.