The situation when a two-chamber refrigerator Atlant stops cooling in the main compartment, but continues to properly freeze food in the freezer, is one of the most common complaints from the owners of this equipment. This behavior of the unit often confuses, because at first glance it seems that the compressor is working, there is a hum, which means that everything is in order with the cooling system. However, the absence of cold in the upper chamber while the bottom is working is a clear signal about a violation of the refrigerant circulation or a malfunction in the temperature control system.
Owners of models with the system No Frost and classic versions with drip defrosting encounter this problem in different ways, but the root of evil is more often everything lies in several typical nodes. It is important not to panic and not rush to throw away food, since in many cases the problem can be diagnosed independently or you can call a specialist with an already prepared understanding of the situation. Understanding how yours works will help you save time and money on repairs. Atlant, will help save time and money on repairs.
In this article we will analyze in detail the mechanical and electrical causes of the malfunction, explain the difference in symptoms for different types of refrigerators and give a clear algorithm of actions. You will learn why the thermostat could fail, why a freon leak is dangerous, and how to check if the capillary pipeline is clogged. The information will help you make an informed decision about further actions with household appliances.
The principle of operation of the Atlant two-chamber cooling system
To understand why the cold disappeared in one chamber, you need to briefly consider working principle the refrigeration circuit. Most models Atlant use one compressor, which pumps refrigerant (freon) into the condenser and then delivers it through a capillary tube to the evaporator. The evaporator in two-chamber models is most often located in the freezer, and cold is supplied to the main compartment either through special channels (in No Frost), or due to natural convection and cold removal through a common wall (in drip models).
If the freezer is working, it means that the compressor is working, the start relay is functioning, and the initial gas compression cycle is occurring. The problem is localized in the area where the cold must be transferred from the freezer to the refrigerator compartment, or at the moment when the refrigerant must boil and absorb heat in the right place. An imbalance in temperature is often due to the fact that freon does not reach the desired section of the evaporator or the control system “thinks” that the cold has already been reached.
It is important to note the difference in designs: in models with No Frost a fan and damper system are responsible for air distribution, while in classic models the key role is played by correct air circulation through a common partition. A failure in any of these elements leads to the fact that the upper chamber turns into a cabinet for storing food at room temperature, while the water below freezes.
Freon leakage: the most common culprit of the problem
The most likely reason that the refrigerator Atlant stopped cooling in the upper compartment is partial refrigerant leak. When the amount of freon in the system decreases due to microcracks in the pipeline, it is no longer enough to fill the entire evaporator circuit. The gas goes through a full cycle, cooling first of all the area where the pressure is lower or which is located closer to the exit from the capillary tube - usually the freezer.
As a result, the evaporator in the freezer becomes overgrown with ice and works efficiently, and until the refrigerator compartment freon simply does not reach or reaches in a gaseous state, having no cooling capacity. You may notice that the compressor is running almost non-stop, trying to reach the set temperature, but the upper chamber remains warm. This is a classic sign of a lack of refrigerant.
⚠️ Attention: It is absolutely impossible to look for a leak on your own or try to fill the refrigerator with freon without evacuating the system and replacing the filter-drier. This will lead to rapid failure of the compressor.
Symptoms may appear gradually: first, the refrigerator begins to cool worse when fully loaded, then the breaks in the compressor operation become shorter, and eventually the upper chamber completely stops cooling. In models with an open evaporator (visible from the back in the chamber), you can notice that only part of the tubes is frozen, and the rest of the surface is dry.
Faults in the No Frost system and damper
If your Atlant equipped with a system No Frostthen the reason for the absence cold in the main chamber while the freezer is running may be due to impaired air circulation. In such refrigerators, cold air is forced by a fan from the freezer compartment into the refrigerator compartment through special air ducts. If this flow is blocked, the cold does not reach the products.
A frequent cause is a malfunction of dampers (damper), which regulates the amount of air supplied. The damper may become stuck in the closed position due to ice or mechanical damage to the actuator. Also, the fan itself often fails: if its impeller freezes in the ice or the motor burns out, the air stops circulating, remaining within the freezer.
How to check the operation of the No Frost fan?
To check, you need to remove the back panel in the freezer (after defrosting the refrigerator). When you turn on the power, the fan should start running. If it hums but does not spin, the bearings may be stuck. If there is silence, check for voltage at the motor terminals.
- ❄️ Ice in the air ducts blocks the air flow, requiring complete defrosting of the unit within 24 hours.
- 🔧 Mechanical damage to the fan blades leads to noise and lack of circulation.
- 🌡️ A malfunction of the defrost sensor can lead to constant freezing of the air supply channel.
Another nuance is the formation of a “snow coat” in the channel between the chambers. Even if the fan is working properly, the ice plug will not allow cold air to rise. In such cases, high-quality defrosting and checking the serviceability of the defrosting heating element is required, which must promptly remove ice from the evaporator.
Problems with the thermostat and temperature sensors
The refrigerator electronics Atlant relies on the readings of temperature sensors. If the thermostat (in mechanical models) or the air sensor (in electronic models) fails and transmits incorrect data, the compressor may turn off too early. For example, the sensor in the freezer “sees” that it is already -18°C and gives a command to stop, ignoring the fact that in the upper chamber it is +15°C.
In older models with mechanical control, the cause may be a displacement of the thermostat tube. The capillary tube of the sensor must fit tightly to the evaporator. If it comes loose or is damaged, the regulator incorrectly reads the temperature and prematurely turns off the motor. Replacing a thermostat is a simple procedure, but requires precise selection of an analogue. thermostat. The capillary tube of the sensor must fit tightly to the evaporator. If it comes loose or is damaged, the regulator incorrectly reads the temperature and prematurely turns off the motor. Replacing a thermostat is a simple procedure, but requires precise selection of an analogue.
In electronically controlled models (where there is a display on the door), defrost sensors or air sensors often “fly”. The system may go into error and block the operation of the compressor or, conversely, prevent it from turning on long enough. Diagnosis of such faults is only possible with the help of a tester and knowledge of error codes for a specific series Atlant.
Clogged capillary tube and filter drier
A less common, but possible cause is blockage in the refrigerant circulation system. During operation, microscopic particles of oxides, oil or moisture may enter the circuit, which turns into an ice plug in a bottleneck in the capillary tube. This phenomenon is often called “hydraulic blockage.”
When blocked, freon cannot circulate freely along the circuit. The compressor tries to push gas, working with increased load and heating up, but the cooling capacity drops. As in the case of a leak, the area before the blockage freezes first (the freezer), while the distant areas (the refrigerator compartment) remain warm.
It is extremely difficult to diagnose a blockage on your own, since the symptoms are almost identical to a freon leak. Professional equipment is required to purge the system with nitrogen and replace the filter drier. If you ignore the problem, the compressor may burn out from overheating, trying to overcome the resistance in the system.
Diagnostics: table of symptoms and causes
To simplify troubleshooting, we recommend using a summary table. It will help compare the visible signs of breakdown with the most likely cause. Remember that only a technician can make an accurate diagnosis after opening the system or checking the electrical circuits.
| Symptom | Probable cause | Characteristic symptom | Difficulty of repair |
|---|---|---|---|
| The freezer is freezing, the top is warm | Freon leakage | The compressor runs non-stop, the evaporator is partially frozen | High (needs sealing, vacuum, refilling) |
| There is no cold in the No Frost chamber | The fan or damper is faulty | A hum is heard, but no air is blowing, or complete silence | Medium (replacement unit) |
| Refrigerator turns on rarely | The thermostat is faulty | The chamber is warm, but the compressor does not start or works little | Low (sensor replacement) |
| The compressor is hot, humming | Clogged capillary system | Circulation is disrupted, the pressure in the system is not normal | High (purge, filter replacement) |
Analysis of symptoms allows you to weed out simple problems that can be solved by defrosting or replacing the thermostat from complex technical ones malfunctions. If you observe a combination of signs indicating a leak or blockage, you cannot do without calling a specialist.
What you can do yourself before the technician arrives
Before calling a repair service, it is worth performing a number of simple steps that sometimes help to revive the unit or accurately determine the nature of the breakdown. First of all, run a full defrosting refrigerator. Unplug it, remove all food and leave the doors open for at least 24 hours (preferably 24 hours). This is necessary to melt the ice in the hidden channels of the No Frost system, which could block air circulation.
After defrosting, turn on the refrigerator without loading food. If after a few hours cold appears in the upper chamber, it means that the problem was freezing of the defrost system. If the situation repeats after a week or two, it means that the defrosting heating element, timer or sensor is faulty, and they need to be replaced.
⚠️ Attention: Do not try to peel off the ice with a knife or other sharp objects. Damage to the evaporator (even microscopic) will lead to immediate release of freon and costly repairs.
Also check the tightness of the door. If the seal (elastic band) has dried out or become dirty, warm air constantly enters the chamber, and the refrigerator does not have time to cool it, although the freezer, being more airtight, can cope. Wipe the seal and check for door distortions.
The cost of repairs and the feasibility of restoration
The issue of saving is acute: is it worth repairing Atlant or is it easier to buy a new one? The cost of work depends on the type of fault. Replacing the thermostat or fan is relatively inexpensive and can extend the life of your appliance by years. However filling with freon and finding a leak is a complex process that requires taking the refrigerator to a workshop (if the leak is in the foamed part of the case) or complex soldering at home.
If a leak is diagnosed in the foamed part circuit (inside the walls of the refrigerator), repairs often become economically impractical. Craftsmen may suggest installing an external evaporator ("crying" on the back wall inside the chamber), which spoils the appearance, but restores functionality. In the case of old models (over 10-12 years old) with an exhausted compressor, replacing the unit may be more reasonable.
Owners should take into account that original spare parts Atlant are available, but the quality of components in different batches may vary. Professional repairs with a guarantee give you a better chance of a long service life than trying to save on materials by refilling yourself.
Prevention of recurrence of malfunctions
To minimize the risk of a reoccurrence, monitor the condition of the equipment. Defrost the refrigerator regularly (once a year), even if you have a No Frost system, for general hygiene and to check the operation of the units. Do not place hot foods in the chamber - this causes increased steam formation and freezing of the channels.
Keep the condenser grille at the back of the refrigerator clean. Dust and animal hair impair heat transfer, causing the compressor to wear out, which indirectly affects the efficiency of the entire cooling system. Simply vacuuming the back wall once every six months prolongs the life of the motor.
Why, after defrosting, did the Atlant refrigerator stop cooling again after a week?
This is a sure sign of a malfunction of the automatic defrosting system. Most likely, the evaporator heating element has burned out, or the thermal relay or defrost sensor has failed. Ice again accumulates in the hidden space and blocks the air supply channels. Diagnostics of the electrical defrost circuit is required.
Is it possible to operate the refrigerator if the upper chamber does not cool?
For a short time - it is possible, but not advisable. The compressor will work non-stop, trying to reach temperature, which will lead to overheating and rapid failure. In addition, the food in the upper chamber will quickly spoil. It is better to turn off the unit before repair.
How to understand that a freon leak has occurred, without tools?
Indirect signs: the compressor works non-stop, the refrigerator body (side walls) does not heat up or heats up weakly, only partial ice is visible in the freezer (for example, only at the entrance of the tubes), and the rest of the evaporator dry. Only a specialist with a pressure gauge will give an exact answer.
How long should the Atlant refrigerator work after defrosting before cold appears?
Usually the first signs of cooling appear after 30-60 minutes of operation. Complete freezing and entering the mode (cyclic on/off) takes from 3 to 6 hours, depending on the volume of the chamber and the temperature in the room. If after 5 hours the upper chamber is warm, there is a malfunction.
Does the position of the temperature regulator affect the operation of the refrigerator?
Yes. If the regulator is turned to minimum (maximum cold), the compressor may not turn off, which leads to freezing. If the cold is at a minimum, the camera may not freeze. To diagnose malfunctions, it is recommended to place the regulator in the middle position.