Modern refrigerators LG equipped with complex control systems that allow you to maintain ideal conditions for storing products. However, when strange symbols or numbers appear on the display, and products begin to deteriorate, the user is faced with the need to understand the settings. Often, requests about how to “show” the mode arise due to the panel being locked or the demo mode being activated, which simulates operation without cooling.
In this article we will analyze in detail the algorithms for setting the temperature for various cameras, methods for unlocking the interface and methods for diagnosing faults through error codes. Correct calibration will not only extend the life of the products, but also reduce the energy consumption of your unit. It is important to understand that digital control requires strict adherence to instructions, since accidental pressing can change the logic of the compressor.
Before proceeding with active actions, make sure that the refrigerator is connected to the network and has passed the initial startup cycle. If you just bought the equipment or defrosted it, the system needs time to stabilize heat exchange. An attempt to change the settings in the first hours of operation may lead to incorrect sensor readings.
Basic principles of Display panel control
Refrigerator control interface LG usually located on the outside of the door and is a touch panel or a set of buttons under display. The main control element is the button Fridge (for the refrigerator) and Freezer (for the freezer). Pressing these keys allows you to cycle through the temperature values. The standard change step is 1 degree Celsius, which provides precise adjustment.
Many users do not know that the control panel is often locked from accidental clicks, especially if there are children in the house. The lock indicator Lock or the image of a key indicates that changes are not possible. To unlock, you must hold down the button Lock or key combination (often Fridge + Freezer) for 3-5 seconds until a characteristic sound signal appears or the lock icon disappears.
⚠️ Attention: If, after unlocking, the panel responds with a delay or does not light up at all, check whether the "Vacation" mode or demo mode is activated, which turns off the backlight to save energy in the store.
The display can display not only the current temperature, but also service information. In normal operation, the numbers indicating degrees are lit. If you see flashing symbols or letters, this may indicate an attempt to enter the service menu or a signal of a malfunction. Touch buttons require a light touch with your finger, the use of sharp objects or strong pressure can damage the membrane.
Optimal temperature values for different chambers
The factory settings of refrigerators LG are usually set to average values, which are suitable for most products. For the refrigerator compartment, the recommended range is +3°C to +5°C. At this temperature, bacteria multiply more slowly and food does not freeze. For the freezer, the standard is -18°C and below, which allows you to store meat and vegetables for up to 12 months without loss of quality.
If you have loaded a large amount of warm food into the refrigerator, it makes sense to temporarily enable the function Express Freeze (Accelerated freezing). This mode causes the compressor to run continuously for several hours, quickly lowering the temperature in the freezer. After automatic completion of the cycle or manual shutdown, the system will return to the previously set values.
Do not set the minimum possible values unless necessary. Working at the limit increases the workload compressor and leads to increased energy consumption. In addition, in the refrigerator compartment at temperatures below +1°C, vegetables with a high water content, such as cucumbers or lettuce, may freeze.
☑️ Checking the temperature regime
In models with a freshness zone (Zero Cooler or Fresh Balancer) the temperature can be adjusted separately. The key here is to maintain 0°C or so to keep meat and fish fresh for several days without freezing. Switching storage modes (meat/fish, vegetables/fruits) often changes not only the temperature, but also the humidity inside the box.
Decoding letter and numeric codes on the display
Sometimes, instead of the usual degrees, users see letters or strange combinations on the screen. This is not always a failure. For example, the code dE or dEMO indicates demo mode. In this state, the refrigerator lights up and makes sounds, but does not cool. To turn it off, you usually need to simultaneously hold down the buttons Fridge and Ice Plus (or Lock) for a few seconds until a signal sounds.
If the numbers are flashing on the display, this often indicates a violation of the temperature regime. For example, if the temperature in the chamber has risen above the permissible level due to a long opening of the door or a power outage, the system signals this by flashing. After the climate inside the chambers has stabilized, the blinking stops automatically.
Serious faults are displayed in the form of error codes starting with a letter F and a number (for example, F1, F2, FF). These codes indicate problems with the temperature sensors, fan, or defrost system. Below is a table with the most common codes for equipment LG.
| Error code | Description of malfunction | Probable cause |
|---|---|---|
rF |
fridge compartment sensor error | Open circuit or short sensor shorted |
rS |
Evaporator sensor error | Sensor malfunction in the cooling zone |
FF |
Freezer sensor error | Problem with the contacts or the sensor itself |
FS |
Freezer sensor error (evaporator) | Defrosting cycle violation |
Er IF |
Ice maker error | Mechanism jamming or sensor malfunction |
⚠️ Attention: The appearance of an error code often requires professional diagnostics. An attempt to reset the error by disconnecting from the network may not eliminate the cause, but only temporarily hide the symptom, which will lead to damage to the products.
Special modes: Vacation, Eco and Intelligent Cooling
Function Eco Saver or "Eco mode" is designed to save energy. When activated, the refrigerator operates in a gentle mode, maintaining the temperature at the upper limit of normal. This is ideal for situations where the refrigerator is not completely full or the room is cool. Activation occurs through a separate button or a long press on the corresponding symbol.
Vacation mode (Vacation) is useful if you are leaving for a long time. He turns off the refrigerator compartment (the temperature rises to +12..+15°C to prevent mold from appearing), but leaves the freezer compartment running. This prevents musty smells when the door is closed and saves energy. To exit the mode, just press the cancel button or select the standard operating mode.
In models with the function Smart Diagnosis or connection to Wi-Fi (ThinQ), the settings can be adjusted remotely or automatically. The system can automatically switch to energy-saving mode at night or when doors are rarely opened. These functions are controlled through an application on your smartphone, where detailed statistics are also available.
If you set the temperature manually and then turned on "Eco", priority may go to energy saving algorithms. Always check the current status of the indicators on the panel to understand which program is currently active.
Diagnostics and resetting settings to factory settings
If the refrigerator behaves inappropriately, the display is glitchy or the temperature “jumps,” you may need to completely reset the settings. This returns all parameters to factory defaults. For most models LG the procedure looks like this: simultaneously hold down the Freezer and Ice Plus (or Lock) buttons for 5-7 seconds. The screen may go out and light up again, which signals a reboot of the control board.
Before resetting, it is recommended to defrost the unit completely if there is a suspicion of icing of the evaporator. Ice can block the sensors, causing the refrigerator to “think” it’s cold inside and not turn on the compressor. After defrosting and resetting the settings, let the device operate without loading products for 4-6 hours to return to mode.
⚠️ Attention: Resetting the settings does not eliminate mechanical failures (freon leak, burnt out compressor). If after rebooting the temperature problem persists, you need to call a specialist.
In some cases, it is necessary to enter the service menu to calibrate the sensors, but this action is not recommended for users without special equipment. Incorrect calibration can lead to the refrigerator operating in incorrect ranges, which will quickly damage the equipment. For normal temperature adjustment, the user interface is sufficient.
Frequently asked questions (FAQ)
Why does the LG refrigerator show the temperature but does not cool?
This may indicate that the demo mode is on (DEMO), a compressor malfunction or a leak refrigerant. Check to see if the Demo light is on and try resetting. If the problem is not solved, diagnostics by a technician is required.
How to turn off the sound signal when the door is opened?
Usually this signal cannot be turned off completely, since it is a security feature. However, on some models, you can temporarily mute the sound by pressing any button on the control panel. Permanent shutdown is only possible through the service menu, which is not recommended.
What does the flashing "Cooling On" sign mean?
This sign appears after defrosting or turning on for the first time. It means that the cooling process is in progress and the compressor is running. As soon as the temperature reaches the set values, the inscription will disappear and the current temperature numbers will appear.
Is it possible to adjust the temperature through the phone?
Yes, if your model supports the technology LG ThinQ and is connected to Wi-Fi. In the application on your smartphone, you can remotely change the temperature, enable special modes and receive error notifications.