The situation when in the refrigeration compartment of equipment Atlant products freeze into ice, and a thick snow coat forms on the back wall, is a common complaint users. This phenomenon not only spoils the appearance of the products, turning vegetables into an unappetizing porridge, but also indicates serious violations in the operation of the unit’s climate system. Unlike the freezer, where extremely low temperatures are the norm, in the upper compartment the climate must be maintained in the range from +2 to +6 degrees Celsius.
The reasons why Atlant refrigerator is very cold in the upper chambercan vary from banal overload of products to failure of expensive electronic components. Owners often ignore the first signs of icing, considering it a temporary failure, but ignoring the problem leads to accelerated wear of the compressor and destruction of the seals. Understanding the physics of the cooling process will help you quickly identify the source of the malfunction.
This article is a technical analysis of possible malfunctions, based on the experience of service engineers. We will look at why the temperature regime is disrupted, how the system No Frost works (if it is provided by the model) or a drip defrosting system, and what actions need to be taken to restore normal operation of the equipment without calling a technician.
Impaired operation of the thermostat and thermostat
The most likely culprit for the abnormally low temperature in the refrigerator compartment is thermostat (thermostat). This component is responsible for turning off the compressor when a preset temperature threshold is reached. If the contacts inside the thermostat “stick” in the closed position, the compressor continues to operate continuously, pumping refrigerant into the evaporator and causing deep freezing of the products.
In models Atlant with electronic control, the role of the thermostat is performed by the air temperature sensor. Its readings may be distorted due to oxidation of contacts or displacement of the seat. In mechanical models, the capillary tube of the thermostat may lose its seal or become displaced, causing it to stop correctly reading the temperature in the chamber.
Diagnosis of this malfunction requires checking the resistance of the sensor or checking the contacts of the mechanical thermostat with a multimeter. When a working sensor cools, its resistance should change according to the technical specifications. If the device shows a break or a permanent short circuit, the part must be replaced.
- 🧊 Symptoms: The compressor works non-stop, the back wall is covered with ice, the temperature of the products is below 0 degrees.
- 🔌 Check: It is necessary to disconnect the refrigerator from the network and check the thermostat contacts for missing “sticking”.
- 🔧 Solution: Replacing the thermostat with one similar in technical characteristics and capillary tube length.
⚠️ Attention: When replacing the thermostat in mechanical models, it is extremely important not bend the capillary tube. Damage to the tube will lead to a leak of freon and will require complex repairs with refilling the system.
Failure of the air flow adjustment damper
In two-chamber refrigerators Atlant, especially in models with a system No Frost or “crying” evaporator, cold air is supplied from the freezer compartment to refrigeration through a special channel. The volume of incoming air is adjusted using a damper. If the damper mechanism gets stuck in the open position or the electronics that drive it break down, an excess volume of cold air enters the upper chamber.
The damper can be mechanical (controlled by a thermostat through a rod) or electronic (controlled by a solenoid or motor). In electronic models, a common problem is the failure of the damper motor itself or the breakage of gears in the gearbox. As a result, the damper remains open, and the temperature in the refrigerator compartment drops to values typical for a freezer.
To check, it is necessary to remove the plastic panel in the upper part of the refrigerator compartment (usually the air duct is hidden behind it). A visual inspection will show whether the damper is fully open. It is also worth checking the integrity of the mechanical damper rods - the plastic becomes brittle over time and breaks.
How to check the operation of the electronic damper without disassembling?
Turn on the refrigerator and listen. As the temperature inside the chamber changes, you should hear a quiet sound or click from the damper motor. If there is sound, but the damper does not move, there is a problem in the mechanics of the drive.
Problems with temperature sensors and electronic module
Modern refrigerators Atlant are equipped with a complex control system that relies on the readings of several sensors. If the temperature sensor in the refrigerator compartment gives an erroneous signal that it is “warm” inside, the controller gives a command to increase the compressor operation. This leads to hypothermia.
Often the problem lies not in the sensor itself, but in oxidation of the connectors or broken contacts in the circuit. Moisture condensing inside the case can cause a short circuit or, conversely, high resistance at the contacts. The electronic control module may interpret this as a need for emergency cooling.
In some cases, the control module itself fails. Power surges in the network can damage the board elements responsible for reading temperature sensors. As a result, the refrigerator goes into emergency operation mode or simply ignores the real temperature inside the chambers.
- 📉 Drift of readings: The sensor can show a temperature 5-10 degrees higher than the real one, causing the system to freeze more strongly.
- ⚡ Influence of the network: Unstable voltage is a common cause of failure of control boards in budget models.
- 🛠 Diagnostics: Requires continuity of the sensors and a visual inspection of the board for swollen capacitors or traces of burning.
⚠️ Attention: Before replacing the electronic module or sensors, make sure that there are no surges in your electrical network voltage. Installing new electronics without a stabilizer can lead to repeated failure in the shortest possible time.
Violation of tightness and thermal insulation
It would seem that a violation of tightness should lead to loss of cold, but in the case of refrigerators Atlant the opposite effect is observed under certain conditions. If the sealing rubber on the refrigerator door is worn out, torn, or simply dirty, warm, moist air constantly flows inside.
The automation system detects the temperature increase and turns on the compressor for a long operating cycle to compensate for the heat gain. As a result, the evaporator is overcooled, and moisture from the air actively condenses and freezes on the back wall and products. There is a “mad freezer” effect in the upper compartment.
It is also worth paying attention to the state of the thermal insulation of the case. If the refrigerator is old, the foam material could become saturated with moisture and lose its properties. In this case, the cold “goes” out, and the compressor works for wear, trying to maintain the set mode, which leads to severe freezing of the internal surfaces.
☑️ Checking the tightness of the door
Table: Comparison of symptoms and probable causes
To simplify diagnosis, we have systematized the main symptoms of malfunctions. Pay attention to the combination of symptoms, since the same problem (for example, ice on the wall) may have different roots.
| Symptom | Probable cause | Difficulty of repair | Required tools |
|---|---|---|---|
| Ice on the back wall, food near the wall is frozen | Faulty thermostat or defrost sensor | Average | Multimeter, screwdriver |
| All products are frozen, including those near the door | Draught jammed or electronics failure | High | Set of keys, tester |
| The refrigerator hums non-stop, the chamber is dry and cold | Freon leak or capillary blockage (paradoxical, but it happens) | High | Refueling equipment |
| Temperature fluctuates, sometimes normal, sometimes frost | Bad contact in the sensor circuit or oxidation | Low | Spray contact cleaner |
The influence of improper operation and loading
Often the reason that The Atlant refrigerator is very coldlies not in a breakdown, but in the actions of the user. Violation of operating rules can confuse even working equipment. For example, setting the temperature controller to the maximum value (“7” or “Max”) in the hot season forces the compressor to work at its limit.
A dense load of products, especially if they block the ventilation holes or are pressed tightly against the back wall, disrupts air circulation. Cold air cannot be evenly distributed throughout the volume, creating local zones with extremely low temperatures, while the sensor (located in another zone) “thinks” that the heat has not yet left.
Placing hot or warm food is also stressful for the system. Sensors detect a sharp jump in temperature and turn on enhanced freezing. If the heat does not have time to dissipate before the next cycle, food may freeze to the shelves, and an ice crust will form on the walls.
- 🥩 Loading: Do not overcrowd the refrigerator, leave gaps for air circulation between foods.
- 🔥 Food temperature: Cool food to room temperature before placing it in camera.
- 🌡 Settings: The optimal setting of the regulator for most models Atlant is position “3” or “4”.
⚠️ Attention: B In older models of Atlant refrigerators, the thermostat may “get tired” over time and be calibrated with a shift. If you turn the knob to “3”, there may be a mode “1” inside. In such cases, empirical selection of the position or replacement of the regulator helps.
Methods of elimination and prevention
If you have determined that the problem is of a technical nature, the first step should be to completely defrost the refrigerator. Disconnect the appliance from the network for 10-12 hours (minimum). This will allow ice to melt in the hidden cavities of the evaporator, which could block the operation of the damper or distort sensor readings. Often, after a long defrosting, the equipment begins to work correctly.
In case of mechanical damage (broken damper, torn seal), parts will need to be replaced. For models Atlant spare parts are available and inexpensive. When replacing a thermostat or sensor, it is important to choose an analogue with identical parameters, otherwise the operating mode of the compressor will be disrupted.
Regular maintenance includes checking the cleanliness of the condenser (grid at the back), washing the drainage hole and monitoring the condition of the seals. Keeping equipment clean extends the life of the electronics and prevents many types of malfunctions associated with overheating or improper defrosting cycle.
Frequently asked questions (FAQ)
Why does water in plastic bottles freeze in the Atlant refrigerator?
Water freezes at 0°C. If ice forms in the bottles, it means that the temperature in the chamber has dropped below zero. This is a sign of a faulty thermostat, sensor or damper that does not stop cooling in time. Diagnostics of the temperature control system is required.
Is it possible to operate the refrigerator if it is very cold?
For a short time - yes, but you can’t work like that for a long time. Constant operation of the compressor without rest cycles leads to overheating and burnout of the windings. In addition, ice can damage glass shelves or deform plastic elements of the internal lining.
How to understand that it is the thermostat that is broken and not the sensor?
In mechanical models (Atlant with a knob inside) there is a thermostat. Models with an electronic display and buttons have temperature sensors. If you have a knob and the refrigerator does not turn off at all, it is most likely the thermostat. If the electronic unit shows an error or incorrect temperature, the problem is in the sensor or board.
Will moving the regulator to the minimum value help?
This is a temporary measure. If the thermostat mechanism is stuck in the “on” position, moving the knob to “minimum” may not break the compressor power circuit. However, in some cases, this helps reduce the intensity of frost before the technician arrives or purchases spare parts.