A sudden failure of the refrigerator LG is always stressful, because food supplies are at risk. The owner may be faced with a situation where the unit hums, but does not cool, or is completely silent and shows no signs of life. Often the problem lies in a simple failure of a software module or a violation of operating conditions, which can be easily corrected on your own.
However, there are also more serious technical malfunctions that require the intervention of specialists. Understanding the operating principles of compressor and the defrosting system will help you quickly diagnose a breakdown. In this article, we will analyze in detail why your refrigerator has stopped performing its functions and what steps need to be taken first.
Do not panic if you find heat inside the chambers. The primary task is to conduct a visual inspection and initial diagnosis, eliminating simple errors. Many users overlook basic things, such as the position of the temperature regulator or the tightness of the door.
Primary diagnostics and checking the power supply
The first thing to do if the refrigerator LG does not turn on is to check the presence of voltage in the outlet. It often happens that the problem is not in the equipment, but in a burnt-out light bulb or a broken machine in the panel. Try connecting another electrical device, such as a hair dryer or charger, to the same outlet.
Carefully inspect the power cord for mechanical damage, kinks or traces of melting. If the cable is damaged, further operation dangerous to life. Some refrigerator models LG have built-in protection against power surges, which can block the start of the compressor until the network stabilizes.
⚠️ Attention: If you smell a burning smell or see sparking in the area of the outlet or power cord, immediately stop trying to turn it on and Call an electrician.
It is also worth checking the integrity of the plug and the tightness of its contact with the socket of the socket. A loose contact can lead to periodic power outages, which negatively affects electronic control module. Make sure that the extension cord or surge protector, if used, is designed for the power of your refrigerator.
Problems with the control system and electronics
Modern refrigerators LG equipped with complex electronics that control all processes. If the display does not light up or the indicators are erroneous, there may be a software glitch. In this case, the reboot system helps: disconnect the device from the network for 10-15 minutes, and then turn it on again.
A frequent cause of incorrect operation is the failure of the thermostat or temperature sensor. If control module receives incorrect data about the temperature in the chamber, it may not give a command to start the compressor. Diagnosis of these elements requires the use of a multimeter and knowledge in electrical engineering.
- 🔌 Check whether the indicators on the control panel are lit after turning on the network.
- ❄️ Make sure that the correct operating mode is set (whether the "Vacation" or "Super Freeze" function is activated without necessary).
- 🔧 Try resetting the settings to factory settings if the instructions for your model LG provide for this option.
It is important to note that power surges in a household network can damage fuse the control board. If after rebooting the refrigerator still does not respond to commands, it will most likely need to replace the electronic components.
How to reset an error on an LG refrigerator?
To reset an error, you often need to hold down a combination of buttons. Usually these are the "Freeze" and "Ice Plus" buttons simultaneously for 3-5 seconds until a beep sounds. Look for the exact combination for your model in the instructions, as it may differ in the DoorCooling+ and InstaView series.
Faults of the compressor and start relay
The heart of any refrigerator is the compressor. If you hear a quiet click, a hum that ends abruptly, or complete silence when the backlight is on, the problem may be in the start relay or the engine itself. Start relay responsible for starting the motor, and its breakdown is one of the most common causes of equipment failure.
When If the compressor is faulty, the refrigerator LG may try to start, but immediately stall due to thermal protection. This condition is critical, since constant attempts to start can completely damage the motor. In such cases, it is necessary to allow the unit to cool for several hours before re-diagnosis.
There is a simple method of initial testing: if the compressor is hot, but does not start, and the relay is working properly, there is a high probability of an interturn short circuit of the windings. Repairing the compressor is often not economically feasible, and it is required complete replacement.
☑️ Compressor diagnostics
It is also worth paying attention to the capacitor, which helps start the engine. Swelling or leakage of electrolyte from the capacitor is a sure sign of its malfunction. Replacing this part is usually inexpensive and brings the refrigerator back to life.
Failures in the No Frost defrost system
Refrigerators LG with the system No Frost are susceptible to the formation of an ice coat in the evaporator if the defrost system does not work correctly. If you notice that the back wall of the freezer is covered with a thick layer of ice, and the refrigerator compartment is warm, then defrosting is not happening.
A heating element (heating element), defrost sensor and timer are responsible for this process. If one of these elements fails, ice blocks the ventilation ducts and cold air stops circulating through the chambers. Visually, this may look like a lack of compressor operation, although it may hum normally.
| System element | Malfunction symptom | Impact on operation |
|---|---|---|
| Defrost heating element | Ice does not melt, freezing on the evaporator | Airflow blocked, no cold |
| Defrost sensor | Circuit malfunction, error on the display | The compressor does not turn on or works constantly |
| Fan | Noise, crackling or silence in the freezer | Cold does not enter the upper chamber |
To fix the problem, it is often necessary to completely defrost the refrigerator within 24 hours. If after this the equipment started working, but a week later the problem recurred, it means that one of the elements of the defrosting system requires replacement.
⚠️ Attention: Do not try to chip off the ice with a knife or sharp objects. Damage to the evaporator will lead to a freon leak and expensive repairs, which are often impractical.
Refrigerant leak and capillary system blockage
If the compressor runs continuously, hums very loudly, but there is no cold, and the condenser (grid at the back) remains only partially cold or warm, a leak is likely Freon. The refrigerant circulates in a closed circuit, and its disappearance indicates a violation of the tightness of the system.
Leaks often occur in places where pipes are soldered or due to corrosion of the evaporator, especially if you have previously tried to tear off the ice with sharp objects. It is also possible that the capillary tube is clogged with oil oxidation products or moisture, which prevents normal gas circulation.
Diagnostics of a leak requires special equipment: a leak detector and a pressure gauge station. The technician pumps nitrogen under pressure to find the location of the fistula, seals it and refills the system with new freon. It is impossible to carry out this procedure on your own impossible without skills and tools.
Mechanical damage and wear of seals
Sometimes the reason for the lack of cold is trivial - the door does not fit tightly. Rubber seal over time it dries out, becomes deformed or becomes dirty, causing warm air to enter the chamber. The compressor works hard, trying to compensate for heat loss, but cannot cope.
You can check the tightness using a sheet of paper: clamp it between the door and the housing in different places. If the sheet is pulled out too easily, it means that the seal does not fit in this place. It is also worth checking the door hinges - if they are loose, the door may warp.
- 🧼 Wipe the seal with a soft cloth soaked in soapy water to remove grease and sticky residue.
- 💨 Use a hairdryer (at minimum temperature) to slightly warm up the deformed section of rubber and straighten it it.
- 🔩 Adjust the position of the door by tightening the hinge mounting bolts if there is a misalignment.
If the seal has cracks or breaks, it must be replaced. Operating a refrigerator LG with damaged insulation leads to rapid failure of the compressor and the formation of condensation inside the housing.
Frequently asked questions (FAQ)
Why does the LG refrigerator hum, but does not freeze?
This may indicate a faulty start relay, a jammed compressor, or a freon leak. The reason may also be the vein of the capillary tube. Diagnostics by a specialist is required.
What to do if an error appears on the display?
Write down the error code (for example, Er FF, Er CF) and refer to the instructions. Try rebooting by unplugging the device for 15 minutes. If the error repeats, you need to call a technician.
Is it possible to use the refrigerator if it is in a draft?
Not recommended. The LG refrigerator, like any other appliance, should be kept away from heat sources and drafts. A draft can disrupt the operation of the thermostat, causing the compressor to work incorrectly.
How often do you need to defrost a No Frost refrigerator?
The No Frost system does not require regular defrosting to remove ice, but it is recommended to turn off the refrigerator at least once a year for hygienic cleaning and prevention.
Why the rear Is the wall of the refrigerator covered with ice?
Most often this is a sign of a malfunction of the defrost system (the heating element or sensor has burned out) or a clogged drainage hole. In rare cases, the door seal is broken.