The situation when the refrigerator Atlant continues to freeze in the upper compartment, but stops cooling food in the lower chamber, is one of the most common problems owners of this equipment. Often users notice an ice crust on the back wall or, conversely, a complete lack of cold when the compressor is running. This behavior of the equipment indicates a violation of the refrigerant circulation or malfunctions in the defrost system, which require immediate attention.
Ignoring the first signs of a malfunction can lead to damage to a large number of products and more expensive repairs in the future. In most cases, the problem lies in the formation of a “snow coat” on the evaporator, which is hidden behind a plastic panel, or in the failure of one of the electronic control components. Understanding the operating principle of your model will help you quickly localize the source of the disaster.
In this article we will analyze in detail the main reasons why lower chamber loses the cold, and consider an algorithm of actions for self-diagnosis. We will touch on both simple cases that require only defrosting, and complex technical malfunctions that require the intervention of a specialist. It is important to correctly identify the symptom so as not to waste time and money on unnecessary procedures.
Primary diagnosis: analysis of symptoms and sounds
Before disassembling the unit, you must carefully listen to the operation of the engine and evaluate the nature of the cooling. If the compressor runs continuously without turning off, but there is no cold below, this often indicates a freon leak or a clogged capillary tube. In such cases, the motor tries to compensate for the lack of refrigerant by constant operation, but the cooling efficiency drops to zero.
In models with the system No Frost the absence of cold when the fan is running may indicate a breakdown of the fan itself or freezing of the air ducts. If you hear a characteristic gurgling or hissing sound, but no cold comes in, there is a possibility of a refrigerant leak increases up to 80%. It is important to distinguish the normal noise of flowing gas from alarm signals of the system.
Pay attention to the frequency of turning the device on and off. If the work cycle is broken and the equipment “threshes” without interruption, this is a critical signal. In normal mode, the compressor should rest, gaining temperature for the next start. Constant load leads to overheating and eventual failure of the motor.
- 🔊 Constant hum: The compressor works non-stop, trying to gain temperature.
- ❄️ Ice crust: A thick layer of ice is visible on the back wall, hiding the evaporator fins.
- 🤐 Silence: The motor is silent or makes rare clicks, trying to start, but to no avail.
Problems of the defrost system in No Frost models
For refrigerators Atlant with the system No Frost the most common cause of loss of cold in the lower compartment is a malfunction of the defrost system. The essence of the problem is that the evaporator, located behind the rear wall, becomes covered with ice. This ice blocks the operation of the fan, and cold air simply cannot enter the food storage chamber.
The key elements of this system are a defrosting heating element, a thermostat (or defrosting sensor) and a fuse. If any of these components fail, the ice will not melt while the compressor is not running. Over time, the ice mass becomes so large that it completely blocks the air circulation channels. Visually, you may not see this, since the evaporator is hidden.
⚠️ Attention: Attempting to chip the ice with a knife or other sharp objects is strictly prohibited. This is guaranteed to lead to breakdown of the evaporator and leakage of freon, which will turn a simple repair into an expensive replacement of the circuit.
Often the breakdown lies in Defrost heating elementwhich simply burns out over time. The sensor that does not give the command to turn on the heating may also “stick” or fail. In some models Atlant there is a breakdown of the fuse, which burns out when the heating element overheats, breaking the circuit. Diagnostics of these elements requires testing with a multimeter.
☑️ Diagnostics of the No Frost system
Faults of the compressor and start relay
The compressor is the heart of the refrigerator, and if it malfunctions, the whole body suffers. In two-compressor models Atlant a separate motor is often responsible for the lower chamber. If it doesn't start but hums, the problem is most likely with the start relay or the compressor itself. A relay is a small plastic block that is placed on the motor contacts and is responsible for starting.
When a compressor fails starting relay the compressor may hum for several seconds, and then there is a click and silence ensues. This triggers thermal protection. If the relay is working properly, but the motor does not start or operates intermittently, an interturn short circuit of the windings or jamming of the piston group is possible. In such cases, it is often necessary to replace the unit.
It is important to check the voltage in the network. Voltage surges can damage electronics or cause unstable motor operation. If the light in your house often “flashes”, it is recommended to use a stabilizer, since electronic control module in modern models it is very sensitive to the quality of the current.
| Symptom | Probable cause | Required actions |
|---|---|---|
| Buzzing for 5-10 seconds, clicking, silence | Faulty starting relay | Replacing the relay (cheap repair) |
| Gets very hot, does not starts | The compressor is jammed | Replacement of the compressor (expensive repairs) |
| Works non-stop, no cold | Freon leak/clogging | Search for leaks, refilling with freon |
How to check the relay yourself?
Remove the relay from the compressor contacts and shake it. If a ringing sound is heard inside (as from broken ceramic or metal), it means that the mechanism is destroyed and requires replacement. You can also test the contacts with a multimeter.
Freon leak and clogged capillary system
If the compressor is working properly, the defrosting system is in order, but there is no cold in the lower chamber, there is a high probability of a refrigerant leak. Freon can escape through microcracks in the foamed circuit, through solder joints, or through corrosion of pipelines. In models Atlant with a steamed evaporator (tubes inside the walls of the housing), this is a particularly unpleasant situation.
Another common reason is clogged capillary tube. Oil circulates in the system, which over time can thicken or mix with breakdown products, forming a plug. The refrigerant stops circulating through the circuit and cooling stops. You can determine the blockage by touch: the condenser (grid at the back) may be only partially cold or warm, and the filter-drier may be covered with frost.
⚠️ Attention: Independent refilling with freon is impossible without special equipment and skills. This is not the case when you can get by with improvised means. A call to a technician with a vacuum pump and a pressure gauge station is required.
Localizing a leak in the foam circuit often requires installing an external evaporator (“crying” on the back wall inside the chamber), since opening the factory foam is not economically feasible. This extends the life of the refrigerator, although it changes its appearance inside the chamber.
Failures in the electronic control module
Modern refrigerators Atlant are controlled by electronics, which can malfunction. If there is an error on the display or the indicators are blinking, this is a direct path to diagnosing the module. Electronics can “glitch” due to voltage surges, moisture, or simply aging of components (capacitors).
A frequent problem is oxidation of contacts or soldering on the control board. In this case, the module may not send a command to turn on the lower chamber compressor or fan. Sometimes a simple reboot helps: disconnecting the device from the network for 15-20 minutes. If the problem returns after turning it on, repair or replacement of the board is required.
If error codes are displayed on the display, their decoding is in the user manual. For example, codes may indicate a broken temperature sensor or a faulty fan. Ignoring these signals will result in the refrigerator completely stopping freezing.
Mechanical damage and leakage
Simple mechanical reasons should not be discounted. If the sealing rubber on the door of the lower chamber is worn out, dirty or deformed, warm air enters the chamber. The compressor does not have time to cool this volume, and the temperature rises. Check the tightness of the door with a sheet of paper: the sheet sandwiched between the door and the body should be pulled out with force.
The cause may also be improper installation of products blocking the distribution channels. If you plug the air duct with a pan or bag, the cold air simply will not reach the food. In systems No Frost air circulation is critical for uniform cooling.
Check the position of the thermostat. Sometimes users accidentally move the control to the "minimum" or "0" position, especially if there are children in the house or when cleaning. Make sure that the settings comply with the manufacturer's recommendations for the current time of year.
Algorithm for self-troubleshooting
If you decide to try to restore operation refrigerator yourself, proceed sequentially. The first and most effective step, which helps in 50% of cases, is complete defrosting. Unplug the appliance, open all doors and leave it for at least 24 hours. This is necessary so that the ice melts in all hidden cavities and channels.
After defrosting, turn on the refrigerator and let it work for several hours without loading food. If cold appears and persists, then the problem was in the defrost system (the evaporator froze). If after a day of operation the cold disappears again, you will have to look deeper for the breakdown - check the relays, sensors or look for a leak.
⚠️ Attention: If you do not have the skills to work with a multimeter and electrical circuits, it is better to entrust further diagnostics after defrosting to a professional. Careless handling of live electrical components is dangerous.
During the diagnostic process, always check the integrity of the wires going to the fan and heating element. Often the wires break at bends or become bent when the boxes are installed carelessly. Restoring contact can solve the problem instantly.
Frequently asked questions (FAQ)
Why does ice freeze below in the Atlant refrigerator, but does not freeze?
This is a classic sign of a malfunction of the defrost system in No Frost models. The ice blocks the fan and the cold does not enter the chamber. Defrosting is required (24 hours) and, probably, replacement of the heating element or defrost sensor.
How long should the Atlant refrigerator cool down after defrosting?
The normal temperature rise time is from 2 to 5 hours, depending on the volume of the chamber and the ambient temperature in the room. If after 5 hours of operation of the compressor the temperature does not drop, there is a technical malfunction.
Is it possible to operate the refrigerator if the lower chamber does not freeze?
For a short time it is possible, but this will lead to spoilage of the products in the lower chamber and increased load on the compressor, which will work for wear. Long-term operation in this mode reduces the service life of the engine.
What does the flashing Alarm indicator on the Atlant refrigerator mean?
The indicator Alarm signals that the temperature in the chamber has risen above the permissible norm. This may be a consequence of loading warm products, a door that is not tightly closed, or a real breakdown of the cooling system.