Why there are problems with cold in the LG refrigerator: diagnostics

The situation when you open the door of your favorite refrigerator, and inside you find products that you clearly did not plan to cook right now, causes panic in anyone housewives. Refrigeration equipment brands LG traditionally famous for their reliability and advanced cooling technologies, but even the most advanced equipment is not immune to failures. The question “why did the LG refrigerator stop freezing” is one of the most common requests to service centers, and the answer to it is rarely unambiguous.

Before calling a technician or looking for the telephone number of the nearest service center, it is worth carrying out the initial diagnostics yourself. Modern units have complex electronics, but often the problem lies in trivial things that can be fixed in a couple of minutes. Understanding the principles of operation of the compressor, system No Frost and thermoregulation will help you save time and money. In this article, we will analyze in detail the main causes of malfunctions, ranging from simple operating errors to complex technical breakdowns.

You should not ignore the first signs of improper operation of the device, since timely intervention can save products and prevent expensive repairs. Cooling system is the heart of your refrigerator, and any malfunctions in its operation require careful study. Let's figure out what exactly could have gone wrong and how to bring the equipment back to life.

Operation errors and simple reasons

Often the reason for the lack of cold lies not in the breakdown of parts, but in violation of the rules of use. Loading density The chamber plays a critical role: if you The shelves are filled to capacity, the air simply cannot circulate. Refrigerators LG with the system Multi Air Flow require free space for effective distribution of flows.

⚠️ Attention: Never place hot or warm food inside the refrigerator compartment. This causes the compressor to wear out, which can lead to overheating and subsequent failure.

Check the position of the temperature regulator. Sometimes children or careless movement can change the settings, switching the mode to “warm” or “eco”. It is also worth paying attention to the tightness of the door seal. If the sealing rubber is dirty or deformed, warm air enters inside and the system cannot cope with maintaining the set parameters.

• ❄️ Check that the food does not block the cold air outlet holes on the back wall.
• 🚪 Make sure that the door closes tightly and is not distorted due to heavy contents on the back wall. shelves.
• 🌡️ Set the thermostat to the middle position (usually 3 or 4 divisions) for the test.

Problems with the No Frost system and ventilation

The technology No Frost, actively used in models LG, implies the absence of ice due to constant air circulation. If you notice that a “fur coat” has formed in the freezer, and it’s warm in the refrigerator compartment, most likely there is a problem in the condensate drainage system or the operation of the fan. Evaporator may be covered with ice, which blocks the operation of the fan.

In such cases, complete defrosting of the unit is often required within days. This is the easiest way to resolve the problem if it is caused by a temporary glitch in the defrost cycle. However, if after defrosting the situation repeats several days later, it means that one of the elements of the defrosting system has failed: the heating element, defrost sensor or timer.

It is also worth listening to the operation of the device. If you do not hear the characteristic noise of a working fan, it means that it is either clogged with ice or burned out. Air circulation in models LG this is a key factor in maintaining temperature in all chambers, including the zone Fresh Zone.

Compressor and start relay failures

The most expensive and serious part of the refrigerator is compressor. If you hear the motor struggling to start, making a clicking noise and stopping, or humming but not starting, the problem may be with the start relay or the compressor itself. Refrigerators LG often use inverter compressors, which are characterized by quiet operation, but require complex diagnostics.

The starting relay is responsible for starting the engine. If it burns out, the compressor will not receive the necessary impulse. Replacing this part is relatively simple and inexpensive. However, if the problem is in the compressor itself (interturn short circuit, wedge of the piston group), then we are talking about a complex repair with replacing the unit and refilling the system with freon.

Inverter models LG are equipped with special control boards that control the engine rotation speed. If the control board is faulty, the compressor may not receive the correct signals. Diagnostics of electronics requires the use of special equipment and knowledge.

Leakage of refrigerant (freon)

If the compressor works practically without stopping, it hums continuously, and there is no cold in any of the chambers, there is a high probability of refrigerant leakage. Freon - this is the working fluid of the refrigeration machine, and without it heat exchange is impossible. In refrigerators LG leaks often occur in the foamed part of the body or in places where the evaporator tubes are soldered.

It is almost impossible to diagnose a leak visually, since freon is colorless and odorless. The technician uses a leak detector or pressure testing method. If a leak in the circuit is confirmed, you need to find the leak, solder it and refill the system. This is a labor-intensive process that requires vacuuming the system.

⚠️ Attention: Self-refilling with freon is strictly prohibited without a license and equipment. The wrong amount of refrigerant or the presence of air in the system will permanently damage the compressor.

Leaks often occur due to mechanical damage. Users may accidentally puncture the evaporator tube with a knife when trying to pick out ice or carelessly cleaning. In models LG with aluminum evaporators, the risk of corrosion and the appearance of microcracks also increases over time.

• 🔍 Inspect the inner walls of the chambers for oily stains (freon often carries oil with it).
• 👂 Pay attention to the duration of operation of the compressor (cycle work/rest).
• 🌡️ Check the temperature of the condenser (grid at the back) - if there is a leak, it will be cold.

Failures in electronic controls and sensors

Modern refrigerators LG stuffed with electronics. The temperature conditions are controlled thermal sensors, located at different points in the chambers. If one of the sensors (for example, an evaporator sensor or an air sensor) gives incorrect readings, the module may “think” that there is cold and not turn on the compressor.

It is also worth mentioning the function Smart Diagnosis, which is built into many models LG. It allows the smartphone to read fault sounds and display an error code. This greatly simplifies the initial diagnosis. Errors may indicate problems with sensors, fans, or communication between modules.

If the error icon lights up on the display or the indicators are blinking, you must refer to the instructions. A simple error reset often helps by turning off the power for 15-20 minutes. However, if the error returns, replacing the sensor is inevitable. error reset by turning off the power for 15-20 minutes. However, if the error returns, replacement of the sensor is inevitable.

Error reset sequence (approximate):
1. Unplug the refrigerator from the outlet.
2. Wait 15-20 minutes.
3. Turn on the power.
4. Press and hold the 'Ice Plus' and 'Freezer' buttons simultaneously for 5 seconds (depending on the model).