Modern refrigerators of the South Korean brand LG are equipped with complex microprocessor control systems that allow you to keep food fresh much longer than older mechanical models. However, it is precisely this technological complexity that often confuses users when it becomes necessary to change standard factory settings. Incorrect settings can lead to rapid spoilage of products or, conversely, to their freezing, which significantly changes the taste and structure.
Understanding the principles of operation inverter compressor and the system Multi Air Flow is the key to proper operation of your equipment. In this article, we will analyze not only the sequence of actions for various interfaces, but also explain the physics of the processes occurring inside the chamber so that you can make informed decisions about setting the storage climate.
The first thing you need to do before making adjustments is to determine the type of control panel on your model. Interfaces can be radically different: from touch screens with graphic elements to simple button panels or even completely hidden displays integrated into the door. LG uses the same operating logic, but the visual design of the controls varies depending on the year of manufacture and series of the refrigerator.
Control interfaces and panel types
All refrigerators LG can be divided into two large groups according to the type of user interaction: models with an external display and models with hidden controls. External displays are usually located on the front panel of the door and can be touch-sensitive or push-button. They provide full access to all settings, including activation of special modes like Express Freeze or Eco Friendly.
Hidden control panels are often located on the inside end of the refrigerator compartment, next to the shelves, or on the top partition. This is done for aesthetics so as not to disturb the design of the kitchen, but this approach requires a more careful study of the instructions. Pressing the hidden buttons may not be obvious because they respond to light touches on certain areas indicated by subtle symbols.
⚠️ Warning: If you press the buttons on the hidden panel and a beep sounds, but the on-screen display does not change, the child lock feature may be activated. Long-pressing a special button (usually with a lock icon) will remove the restriction.
It is important to distinguish between models with digital control and those where the temperature is controlled by a mechanical switch with divisions from 1 to 5 or 7. In the latter, the number does not indicate degrees Celsius, but only indicates the intensity of the compressor. To accurately set the temperature in degrees, you need a digital interface, which is found in most modern models of the series DoorCooling+ i InstaView.
Optimal temperature conditions for different products
There is no universal temperature value that would be suitable for absolutely all products. Biological processes in meat, dairy products and vegetables occur at different rates, and each type requires a different microclimate for maximum shelf life. The standard recommendation for the main chamber is the range from +3°C to +5°C.
If you set the value below +2°C, you risk freezing vegetables and fruits containing a large amount of water. When water freezes, it expands, tearing apart the plant's cell walls, which turns the crisp cucumber into a limp mass once it thaws. On the other hand, temperatures above +6°C create a favorable environment for the growth of bacteria, especially in dairy products and ready-made meals.
Freezing in the freezer requires a stable temperature of -18°C or lower. It is at this value that the activity of microorganisms and enzymatic processes stops. The function Super Freeze allows you to temporarily lower the temperature to -24°C for quick freezing of fresh products, preserving their structure, but constantly maintaining this mode is not recommended due to increased energy consumption.
| Product type | Recommended zone | Optimal temperature | Shelf life (approximate) |
|---|---|---|---|
| Fresh meat and fish | Fresh Zone | 0°C ... +2°C | 2-4 days |
| Dairy products | Middle and top shelves | +2°C ... +4°C | 3-7 days |
| Vegetables and fruits | Drawers below (Crisp Box) | +5°C ... +8°C | 1-2 weeks |
| Ready meals | Middle shelves | +3°C ... +5°C | 2-3 days |
Step-by-step instructions: setting via an external display
Setting the temperature on models with an external screen is usually done intuitively, but has its own nuances. First you need to make sure that the refrigerator is connected to the network and is operating normally. If the screen is dark, touch any button to activate it.
To change the main camera settings, find the button with the inscription Fridge or the refrigerator icon. Pressing it will cycle through the temperature settings. The standard change step is 1 degree. After the last press, the value is fixed automatically after a few seconds, and a confirmation sound signal is heard.
☑️ Algorithm for setting up the external display
The freezer is set up in the same way, but here the button Freezer or the snowflake icon is used. Please note that when you turn on the super freeze mode, the corresponding indicator will light up on the screen and the temperature will be forcibly reduced. You need to disable this mode manually if it does not turn off automatically by a timer (usually after 24-48 hours).
In some models with the function Smart Diagnosis or a Wi-Fi connection, changes may be duplicated in the mobile application. If you have changed the settings on the refrigerator, but they have not updated in the application, try updating the device status in the application menu.
Adjusting settings on the interior panel
If the display is located inside the refrigerator compartment, the adjustment procedure requires opening the door, which may lead to a brief increase in the temperature inside. You need to act quickly and confidently. The control panel is most often located on the upper inner wall or on the side partition.
The principle of operation is similar to external displays: pressing the button Temp or Fridge changes the digital value on the LED indicator. The peculiarity of the internal panels is that they often do not have separate adjustments for the freezer, unless it is a No Frost model with two compressors. In such cases, the freezer operates in a fixed mode, and the main chamber is adjusted by the user.
⚠️ Attention: When adjusting the internal panel, try not to load warm food into the refrigerator at the time of adjustment. A sharp temperature change can cause sensor errors and temporary incorrect display of values.
For models with a mechanical regulator (rotary knob) inside the camera, everything is simpler, but less accurate. Turning it counterclockwise reduces cooling (the number becomes smaller), turning it clockwise increases it. Here it is important to be guided not by numbers, but by the actual state of the products and the readings of the thermometer placed on the shelf.
Why are the settings lost after the lights are turned off?
Only user scenarios are saved in the refrigerator’s memory, but the basic temperature settings are often reset to factory settings (usually +3°C for the refrigerator and -18°C for the freezer) after a complete blackout. This is protection against incorrect values.
Special modes and climate control functions
Technologies LG they offer not just setting degrees, but microclimate control through special functions. The Smart Saving (or Eco) mode automatically adapts the compressor operation to your usage habits, slightly increasing the temperature at night or when the door is not used for a long time, which saves energy.
Function Express Freeze is useful when you need to quickly freeze large quantities of fresh food. It forces the compressor to operate at maximum power, ignoring the current temperature settings until you turn off the mode or a set time has passed. It cannot be used constantly, as this leads to increased formation of ice (in older models) and wear of the equipment.
The Zero Degree or Fresh Zonearea deserves special attention. In some advanced models, the temperature in this particular box can be adjusted independently of the main chamber. This is an ideal place for storing meat, fish and cheeses that require conditions close to freezing, but without freezing.
Diagnosis of problems: when the temperature does not hold
There are situations when you have set the correct values, but the food spoils or freezes. This may indicate a malfunction. The first sign of problems with the temperature regime is the continuous operation of the compressor without stopping or, conversely, turning on too rarely at a clearly high temperature inside.
A frequent cause of unstable temperature is damage to the door seal. If the rubber does not fit tightly, warm air constantly enters, causing the cooling system to work in enhanced mode, but not achieve the specified parameters. Check the seal around the entire perimeter by pressing a piece of paper against it: if it comes out too easily, the seal requires replacement or adjustment.
It is also worth checking the air duct damper, which regulates the flow of cold air from the freezer to the refrigerator compartment. If it is stuck open, food in the refrigerator compartment may freeze. If it is closed, the temperature will rise. Cleaning the air ducts of ice and debris often solves the problem without calling a technician.
⚠️ Attention: If you notice that the back wall of the refrigerator compartment is covered with a layer of ice or a “fur coat”, and the temperature does not drop below +10°C, there may be a refrigerant leak or a faulty thermostat. Operating in this mode is dangerous for the compressor.
Frequently asked questions (FAQ)
Why does the LG refrigerator make clicking noises after changing the temperature?
Clicks are the normal sound of the thermostat or relay that switches the power circuits of the compressor and fans. The plastic case may also click when the temperature changes (thermal expansion of materials). If the clicks are not accompanied by a refusal to operate, there is no need to worry.
How quickly does the refrigerator reach the set mode after setting?
Usually, stabilizing the temperature after changing the settings takes from 2 to 6 hours, depending on the workload of the chambers and the ambient temperature in the room. Complete equalization of the temperature at all points in the volume may take up to 24 hours.
Is it possible to set the temperature below -20°C in the freezer all the time?
Technically this is possible, but it is not economically feasible. Temperatures below -18°C do not significantly improve the shelf life of most products, but increase energy consumption by 10-15% for every 2 degrees of decrease. The -24°C mode is intended only for short-term shock freezing.
What to do if the display shows an error and does not change the temperature?
Try resetting the settings by unplugging the refrigerator for 10-15 minutes. If after turning on the error repeats (often these are codes like Er FF, Er SF), this indicates a malfunction of a specific sensor or fan, which requires contacting a service center.