Owners of premium equipment often face a situation when the upper chamber of the refrigerator suddenly stops working Liebherr. This can be expressed in a complete absence of cold, insufficient cooling of products, or, conversely, in their freezing where the temperature should be above zero. Malfunction of the upper compartment - this is a serious signal that there is a malfunction in the refrigerant circulation system or in the electronic control that requires immediate attention.
Modern models of the German brand, such as the CBNes or CNesseries, are equipped with a complex system NoFrost and intelligent control, which makes them vulnerable to voltage surges and contamination of internal channels. Before calling a technician, it is necessary to carry out an initial diagnosis in order to understand the scale of the problem: is it a software failure that can be fixed by rebooting, or does the compressor need to be replaced.
In this article we will analyze in detail the main reasons why There is no cooling in the upper compartment when the lower one is workingand consider the algorithm of actions for independently identifying the breakdown. Understanding the principles of operation of your model will help you avoid unnecessary expenses on repairs and keep your food fresh.
Checking the settings and operating modes of the electronics
The most common, but common reason is incorrect temperature settings. Refrigerator electronics Liebherr are sensitive to power surges in the network, which can lead to a reset of parameters or a transition to emergency mode. If you notice that the upper chamber is not freezing, the first thing to do is check the digital display or the position of the mechanical controls.
Some models activate a mode SuperFrost or demonstration mode, which blocks normal operation of the compressor after a certain cycle. You should also make sure that the Vacation function is not turned on, which often turns off the top compartment to save energy, leaving only the freezer compartment at the bottom to work.
⚠️ Attention: Before resetting the settings to factory values, be sure to take a photo of the current settings on your phone in order to return individual preferences, if necessary.
For the control system to work correctly, you must do the following actions:
- 🔄 Disconnect the refrigerator from the network for 10-15 minutes to completely reboot the controller.
- ❄️ Set the temperature in the upper chamber to +5°C and observe the changes for 2-3 hours.
- 🔌 Check the door tightness and looseness foreign objects blocking the sensors.
- 📟 Read the error code if it is displayed on the screen (for example, F1, F2 or flashing indicators).
Problems with the NoFrost system and ventilation
If the upper chamber of the refrigerator Liebherr stopped cooling, but the compressor works continuously, the problem may lie in a violation of the circulation of cold air. In systems NoFrost cold is produced in the evaporator (often located in the freezer or behind the back wall) and is forced by a fan into the upper compartment through special channels.
Clogging these channels with ice plugs is a common occurrence. This occurs when moisture from food or a door that is not closed tightly causes excess ice to form on the evaporator. The fan Liebherr cannot force air through the ice jam, and the upper chamber remains warm while the freezer continues to freeze.
Main signs of ventilation failure:
- 🌬️ Cold air does not blow from the upper chamber, although a strong flow is felt from below.
- 🧊 On the back wall of the upper compartment are visible ice or, conversely, it is completely dry and warm.
- 🔊 You can hear the hum of a fan that is trying to work, but cannot turn the blades due to ice.
- 💧 The appearance of water at the bottom of the refrigerator compartment due to the melting of an ice plug in the channel.
To eliminate This problem often requires complete defrosting of the unit within 24 hours. If after defrosting the problem returns after a few days, it means that Defrost heating element or the defrost timer has failed, and the ice plug forms again.
Faults of temperature sensors and thermostats
Refrigerator electronics Liebherr relies on the readings of many sensors. If temperature sensor the upper chamber transmits incorrect data (for example, it shows that it is already -10°C, although in fact it is +15°C), the controller simply will not give a command to cool.
In models with mechanical control, the thermostat is responsible for this function. Its capillary tube may have become dislodged or lost its seal. In digital models Liebherr sensors (thermistors) often fail due to oxidation of contacts or voltage surges.
Symptoms of sensor failure:
- 🌡️ The temperature in the chamber does not correspond to that set on the display.
- ⏱️ The compressor turns on too rarely or does not turn on at all, despite the warmth inside.
- 💡 The temperature indicator flashes or shows an error (for example, F1 or F2).
- 🧊 Food in the upper chamber is either defrosted or frozen at the back wall.
How to check a sensor with a multimeter?
To check, you need to remove the sensor and test its resistance at room temperature. Usually it is about 2-3 kOhm. As your hand heats up, the resistance should change smoothly. If the device shows a break or zero, the sensor is faulty and requires replacement.
Refrigerant leak and problems with the compressor
The most serious reason why the upper chamber does not work is freon leak. Double-compartment refrigerators Liebherr often use one compressor and one refrigeration circuit, where the refrigerant passes first through the freezer compartment and then through the refrigerator compartment. If there is not enough gas in the system, it is only enough for the first stage (freezer), and it simply does not reach the top in the required state of aggregation.
It is also possible for the compressor itself to fail when it loses performance. The engine hums and tries to start, but does not create enough pressure to pump freon throughout the entire circuit. This often happens after long power outages or power surges.
Signs of a compressor leak or breakdown:
- ❄️ The freezer compartment is working normally, but the top one is warm.
- 🔇 The compressor runs at short intervals or, conversely, hums continuously no shutdowns.
- 🔥 The rear grille of the refrigerator (condenser) remains cold or only partially heats up.
- 💨 No characteristic sound of gurgling or hissing of freon inside the pipelines during operation.
In case of a leak, searching for the damage site, soldering and refilling the system are required refrigerant. It is impossible to fix this malfunction on your own without special equipment and a license.
Clogged capillary tube and filter drier
There are narrow sections in the refrigerant circulation system - the capillary tube and filter drier. Over time, they may become clogged due to oil oxidation products or moisture entering the circuit. This prevents the normal flow of freon.
If the capillary tube is clogged, the pressure in the system increases, the compressor operates with overload, but cold does not flow into the upper chamber. This is often accompanied by strong heating of the compressor housing and the absence of the characteristic sound of gas flow.
To eliminate the blockage, you need:
- Pumping out the old refrigerant from the system.
- Replacing the filter-drier with a new one.
- Purge the circuit with nitrogen under high pressure.
- Evacuate the system and refill with freon.
Diagnostic table for main faults
To quickly navigate the problem, use the following table, which compares symptoms with probable causes in refrigerators Liebherr.
| Symptom | Probable reason | Difficulty of repair | Required action |
|---|---|---|---|
| The top does not freeze, the bottom freezes | Freon leak or blockage | High | Call a technician |
| Heat everywhere, compressor is silent | Electronics or thermostat failure | Average | Reboot or replace sensor |
| Ice on the back wall of the top | Faulty defrost system | Average | Replacing the heating element or timer |
| Fan noise, no cold | Evaporator freezing | Low | Full defrost (24 hours) |
| Temperature indicator flashing | Sensor error | Low/Medium | Checking the error code and replacing |
When you need to call a professional technician
Despite the desire to save money, there are situations when self-repair of the refrigerator Liebherr can lead to final breakdown unit. Intervention in the cooling system requires specific knowledge and tools.
It is strictly not recommended to open a sealed circuit, change the compressor or solder pipes without the appropriate experience. An error in the refrigerant dosage or moisture entering the system due to improper evacuation will permanently damage the equipment.
⚠️ Attention: Opening the seals on the compressor or violating the integrity of the cooling circuit automatically removes the device from warranty service, even if the warranty period has not yet expired.
Contacting a specialist is necessary, if:
- 🛠️ The compressor needs to be replaced or work with the refrigerant.
- 🔌 There is a suspicion of a malfunction of the main control module (board).
- 💧 A visible oily trace is detected on the tubes (a sign of a leak).
- 🔊 The compressor hums, clicks, but does not start (problem with the start relay).
☑️ Actions before the technician arrives
Frequently asked questions (FAQ)
Why, after defrosting, did the upper chamber stop freezing again after 2 days?
Most likely, the problem is a malfunction of the automatic defrosting system. If the heating element of the evaporator heaterhas burned out, the defrost sensor or timer does not work, the ice plug has formed again and blocked the cold air supply channels. Replacement of elements of the NoFrost system is required.
Is it possible to operate a Liebherr refrigerator if the upper chamber does not work?
Short-term operation is possible, but undesirable. If the cause is a freon leak, the compressor will work hard, trying to gain temperature, which will lead to its combustion. If the problem is electronic, there may be further damage to the control board. It is better to turn off the device before diagnostics.
What does the flashing red temperature indicator in the upper chamber mean?
A flashing indicator on the displays Liebherr usually signals that the permissible temperature in the chamber has been exceeded. If, after loading food and closing the door, it does not go out for several hours, this indicates a technical malfunction (leakage, fan or sensor failure).
How long does it take to defrost the refrigerator to remove the ice plug?
For complete melting of the ice in the hidden channels of the NoFrost system in the refrigerator Liebherr it is required to stand unplugged from the network with the doors open for at least 24 hours. A shorter defrosting may not completely eliminate the problem, and the ice will remain in hard-to-reach places.