Modern LG refrigerators are equipped with sophisticated electronics, which often controls the operation of the freezer automatically. However, there are situations when the user needs to independently activate the deep freeze mode, restart the system after defrosting, or turn on only the freezer if the main compartment malfunctions. Understanding the operating principles of cooling systems your device will help you avoid panic and unnecessary calls to the technician.
In this article we will analyze in detail all existing methods of activating the freezer, from standard settings to engineering modes. You will learn why the indicators may flash, how to properly perform the initial startup, and what to do if the equipment stops freezing. Competent operation extends the life of the compressor.
Before you start setting up, it is important to determine the type of control of your device. Models with Digital Inverter Compressor may behave differently than classic units. Carefully study the control panel, since the location of buttons and menus may differ depending on the series, for example, LG DoorCooling+ or LG InstaView.
Initial startup and activation after defrosting
After purchasing a new refrigerator or carrying out a complete defrost, the device does not start freezing instantly. The electronics take time to diagnose themselves, and the refrigerant takes time to circulate through the system. Plug in the power cord and make sure the outlet is working properly. Usually it lights up power indicator, and after a few seconds the characteristic sound of the compressor starting is heard.
If you have just defrosted the equipment, make sure that there are no puddles or ice left inside the chambers. Moisture on electronic boards or in the drainage system can cause short circuits or sensor failure. Wipe all surfaces with a dry cloth and leave the doors open for 15-20 minutes to allow any residual moisture to evaporate.
⚠️ Attention: Do not load food into the freezer immediately after turning it on. An empty refrigerator takes 2 to 4 hours to reach operating temperature. Loading warm products will increase the load on the compressor.
The primary cooling process may take up to 24 hours to achieve stable values. During this period, do not open the doors unless absolutely necessary. The system No Frostinstalled in most LG models will begin to work automatically as soon as the sensors detect that the target temperature has been reached.
☑️ Initial startup of the refrigerator
Setting operating modes via the control panel
The freezer is controlled via an electronic panel located on the front of the door or inside refrigeration compartment. Depending on the model, the interface can be touch or push-button. To activate the quick freezing function, find the button labeled Freeze or Super Freeze.
When this button is pressed, the corresponding indicator lights up and the compressor goes into continuous operation for several hours. This allows you to quickly freeze fresh food, preserving its structure and vitamins. Once the cycle is complete (usually 20-50 hours, depending on the model), the refrigerator will automatically return to standard settings.
Use the arrow buttons or degree symbols to fine-tune the temperature. The optimal value for long-term storage is -18°C. If you need to set a lower temperature to store specific products, use the Deep Freezemode, if provided by your model.
Some modern models support control via an application LG ThinQ. In this case, you can activate the freezer remotely while in another room or even outside the house. This is especially convenient if you forgot to turn on the freeze mode before going to the store.
Using the Express Freeze function
Function Express Freeze (or Super Freeze) is one of the most useful tools in the arsenal of an LG refrigerator owner. It is designed for quick freezing of large quantities of food. When this mode is activated, the freezer fan and compressor operate at maximum performance.
To enable this option, press the button Freeze on the control panel. The indicator will light up, signaling the start of operation in enhanced mode.
⚠️ Attention: Do not leave Express Freeze mode on for more than 24 hours unless absolutely necessary. Constant operation at the limit of capabilities can reduce the life of the inverter compressor.
The function automatically turns off after the temperature in the chamber has stabilized at a predetermined level, or after the timer has expired (usually about 20 hours). On models without automatic reset, you must manually press the button again to turn off the mode.
What happens inside during Express Freeze?
When this mode is activated, the electronics ignore standard defrost cycles and force the compressor to run without interruption. The evaporator temperature drops significantly below normal, which provides a cryogenic freezing effect, preventing the formation of large ice crystals in products.
Smart Defrost mode
LG refrigerators with the system Total No Frost do not require manual defrosting, as they are equipped with an automatic defrost. However, if you notice ice build-up or are doing some general cleaning, you may need to manually start the defrost cycle or turn off the freezer completely.
To defrost, you must unplug the appliance for at least 8-10 hours. Some advanced models have a hidden service mode, but for the average user it is safer to use the natural defrosting method. After turning on the power, the system itself will start testing the sensors.
If the freezer does not turn on after defrosting, check whether the control panel is locked. Accidentally pressing a combination of buttons could activate Child Lock (child lock). Typically, to unlock, you need to hold the button with the image of a lock for 3-5 seconds.
| Symptom | Possible cause | Action |
|---|---|---|
| The temperature indicator is flashing | The temperature is higher norms | Check that the door is tightly closed |
| The Freeze button is on | The super-freeze mode is on | Press the button again to turn it off |
| Indicators are not on | No power or failure | Check the socket and cable |
| Fan noise is heard | Normal operation No Frost | Waiting for mode stabilization |
Diagnostics and reset of electronics errors
Sometimes an LG refrigerator may stop freezing due to a software failure of the controller. In this case, a full reset helps. Unplug the device for 10–15 minutes. This time is necessary for the capacitors on the control board to completely discharge and the memory to be reset to factory values.
After turning on again, the system will begin a self-test cycle. If error codes such as Er FF (freezer fan error) or Er IF (ice maker error) appear on the display, this indicates a specific malfunction. In such cases, a simple reboot may not help.
For models with Smart Diagnosis you can use your smartphone to transmit sound signals to the operator or application. This allows you to quickly determine whether the sensor, thermostat or compressor itself needs to be replaced. Do not ignore repeated error codes.
Frequent problems and their solutions
One of the common problems is the situation when the freezer is working, but the temperature does not drop below -5°C. Often the reason lies in a loose door or a damaged seal. Check the rubber circuit around the perimeter of the camera for cracks, dirt or deformation.
Another common problem is icing on the back wall, which blocks air circulation. In systems No Frost this may indicate a clogged drain hole or a malfunction of the defrost heating element. In this case, defrosting and cleaning the drainage is required.
If you hear the compressor turning on and off immediately, or running continuously without reaching the desired temperature, there may be a freon leak. In this case, turning on the freezer is impossible without the intervention of a specialist and charging with refrigerant.
⚠️ Attention: If you smell burning or see sparking in the control panel area, immediately unplug the refrigerator. Operation of such a device is dangerous to life and can lead to a fire.
Questions and answers (FAQ)
How long should you wait to turn on the LG refrigerator after transportation?
If the refrigerator was transported in an upright position, it is enough to wait 2-3 hours. If the device was lying on its side, you must wait at least 8–12 hours for the oil to drain back into the compressor. Turning on earlier than this period can lead to water hammer and breakdown compressor.
Why does the temperature indicator flash in the freezer?
A flashing indicator usually indicates that the temperature inside the chamber is above the set norm. This is normal in the first hours after switching on, after loading a large amount of food, or if the door has been open for a long time. If the blinking continues for more than 24 hours, check the tightness of the seal.
Is it possible to use the freezer separately if the refrigerator compartment is broken?
In most LG two-chamber refrigerators with one compressor, it is impossible to separate the cooling circuits. If the main circuit breaks down or a freon breakdown occurs, there will be no cold anywhere. However, if only the refrigerator fan is faulty or the air supply duct is clogged, the freezer may continue to operate.
How to turn off the door open sound signal?
On most LG models, you can temporarily turn off the sound signal by pressing any button on the control panel. To turn off the signal completely, you need to enter the service menu or use a combination of buttons (depending on the model), but it is not recommended to do this unless necessary, since the signal warns of food spoilage.