Owners of household appliances are often faced with a situation where the refrigerator continues to hum and work, but the temperature in the freezer or refrigerator compartment no longer meets the standards. If you find that Atlant refrigerator the upper chamber is not freezing, this can lead to rapid spoilage of food and defrosting of supplies. This problem is typical for both old Soviet models and modern two-chamber units with the No Frost or drip defrosting system.
The first thing to do when a malfunction is detected is to assess the scale of the problem. Sometimes the cause is a simple violation of operating rules, for example, a door that is not tightly closed or a clogged drain hole. However, in most cases, when Atlant ceases to keep the cold in the upper compartment, we are talking about more serious technical failures that require the intervention of a technician or self-diagnosis of control units.
In this article we will analyze in detail the main causes of failure, methods for identifying them and action algorithms. It is critically important to understand that if the compressor is running non-stop, but there is no cold, this almost always indicates a refrigerant leak or a clogged capillary system. Ignoring these symptoms can lead to overheating of the motor and the need for an expensive compressor replacement.
Checking the thermostat settings and tightness
Before you panic and call a specialist, you should exclude the simplest and most obvious reasons. Often, users accidentally change the settings or do not notice that the door remains ajar due to an object caught between the seal and the body. In refrigerators Atlant with mechanical control, the thermostat is a rotary knob, the position of which could have shifted to a minimum.
If the regulator is in the “1” or “Min” position, the compressor may turn on rarely, which is not enough to freeze food in the upper chamber, especially in summer. It is necessary to move the handle to the middle position, usually the numbers “3” or “4”. For electronic models with a display, you should check whether the “Vacation” or “Eco” mode is activated, which forcibly keeps the temperature elevated.
It is also worth carefully inspecting the rubber seal around the perimeter of the door. Over time, the rubber dries out, cracks, or simply becomes dirty, which is why the chamber is not airtight. Warm air from the kitchen constantly gets inside, and the unit simply does not have time to cool it.
- 🧊 Check that the food does not fit tightly against the back wall, blocking the air circulation.
- 🚪 Make sure that the door closes tightly and does not open without permission when lightly pressed.
- 🌡️ Give the equipment 3-4 hours to stabilize the temperature after changing the thermostat settings.
Do a test with a sheet of paper: hold it with the door and try to pull it out. If the paper is removed without resistance anywhere along the perimeter, the seal requires replacement or adjustment of the hinges.
Malfunctions of the defrost system (for No Frost models)
If your Atlant is equipped with a No Frost system, then the lack of cold in the upper chamber when the compressor is running often indicates problems with defrosting evaporator. In such models, ice does not form inside the chamber, but settles on a hidden evaporator, which must be periodically heated by a heating element. If this process is disrupted, the ice coat completely blocks the cold air supply channels.
As a result, the fan circulates air, but it does not cool, since the heat exchanger is encased in ice. You may notice that the refrigerator is humming louder than usual or, conversely, quieter if the fan itself is clogged with ice. In some cases, you can hear the sound of breaking ice when you try to start the fan.
⚠️ Attention: If you find ice freezing on the back wall inside the chamber or in a niche behind the plastic panel, under no circumstances try to pick out the ice with a knife or sharp objects. This is guaranteed to lead to a breakdown of the circuit and a freon leak.
For diagnostics, you need to defrost the refrigerator completely. Leave the doors open for at least 24 hours (day), preferably more. If, after complete defrosting, the unit worked normally and cold appeared, then the problem is definitely in the defrost system.
The main elements that could fail:
- ❄️ Defrost heating element - could burn out and stop heating the evaporator.
- 🕰️ Defrost timer or electronic control module - “frozen” or broken, not giving a command to heat.
- 🌡️ Defrost sensor (defrost) - incorrectly reads the temperature and does not start the defrosting cycle.
How to check the heating element with a multimeter?
To check the heating element you need to gain access to the evaporator (remove the back panel in the freezer). Disconnect the wires from the heating element and test it with a tester in resistance measurement mode. If the device shows a break (infinity), the heating element has burned out and requires replacement. Normal resistance is usually between 200 and 400 ohms.
Problems with the thermostat or temperature sensor
The thermostat (thermostat) is the “brain” that decides when to turn the compressor on and off. Older models Atlant use a mechanical thermostat with a bellows tube that is attached to the evaporator. If this tube has shifted, oxidized, or the mechanism itself has failed, the compressor may simply not receive a signal that the chamber has become warm.
In modern electronically controlled models, air temperature sensors play the role of a thermostat. They are located inside the cameras and transmit data to the main module. If the sensor “lies” and shows that the chamber is -10°C, although there is +5°C, the refrigerator will not turn on the cooling.
Signs of a malfunctioning thermostat:
- 🔌 The compressor does not turn on at all, although the light is on.
- 🔄 The unit works non-stop, but does not freeze (if the sensor is stuck in the “cold” position).
- 🔨 There is no characteristic click when turning the regulator knob.
Replacing a mechanical thermostat is a procedure that can be performed independently if you have basic skills. It is necessary to remove the regulator handle, unscrew the fastening nut, pull out the body and carefully remove the capillary tube from the seat. When installing a new one, it is important to correctly secure the tube to the evaporator, otherwise the adjustment will be incorrect.
Freon leakage or blockage of the capillary system
These are the most serious technical faults that require professional repairs using specialized equipment. The refrigerant (freon) circulates in a closed circuit. If a microcrack appears in the system (often in the foam circuit or at the joints of the tubes), the gas gradually escapes. Without freon, heat exchange is impossible, and the upper chamber stops freezing.
Clogging of the capillary tube occurs due to moisture entering the system or oil oxidation products. An ice blockage or dirt blockage forms in a narrow place in the tube, which blocks the circulation of the refrigerant. In this case, the compressor may work constantly, trying to push through the system, but there will be no cold.
Symptoms of a leak or blockage:
- 🔥 The compressor works continuously, gets very hot, but does not turn off.
- 🧊 The freezer can freeze weakly or only at the back wall, and the upper chamber is warm.
- 💧 Oily stains are visible on the floor under the refrigerator or near the compressor (oil comes out along with freon).
It is rarely possible to diagnose a leak visually, since the pipelines are often sealed in the polyurethane foam layer of the housing. The technician uses a leak detector or nitrogen pressure testing method. Repair involves finding the leak, sealing, evacuating the system and filling with new freon.
| Symptom | Probable cause | Difficulty of repair | Necessary equipment |
|---|---|---|---|
| The compressor is silent | Thermostat or start relay is faulty | Low | Multimeter, screwdriver |
| Works non-stop, no cold | Freon leakage | High | Vacuumator, pressure gauge, freon |
| Ice in the freezer, no cold at the top | System malfunction No Frost | Medium | Multimeter, hair dryer |
| Buzzes, clicks, does not start | The compressor is jammed or the relay is burned out | Medium/High | Start relay, tester |
Malfunction of the compressor and start relay
The compressor is the heart of the refrigerator Atlant. If it does not start or works intermittently, no cold is produced. Often, along with the compressor, the start-up relay fails. This is a small device that provides an impulse to start the engine. If the relay is burned out, you will hear a characteristic click, the hum of the motor for several seconds, and then again a click and silence.
If the compressor starts but does not pump (does not create pressure), this may mean an interturn short circuit of the windings or mechanical wear of the piston group. In this case, the motor may get very hot, hum unusually loudly, or, conversely, work quieter than usual.
To check the relay you need to:
- Disconnect the refrigerator from the mains.
- Remove the back cover at the bottom of the unit.
- Carefully remove starting relay from the compressor (it is usually simply put on the contacts).
- Shake the relay near your ear: if something rattles inside, it means that the winding or core is damaged and the part must be replaced.
⚠️ Attention: Before any manipulations with electrical components, make sure that the power cord is removed from sockets Residual voltage in capacitors can be dangerous.
Replacing the start relay is a simple and inexpensive procedure. The main thing is to choose a part with exactly the same markings as the original. If the problem is in the compressor itself, replacing it requires soldering pipelines, filling with oil and freon, which only a service center can do.
☑️ Diagnostics before calling a technician
Influence of the environment and operating conditions
Sometimes the reason that Atlant refrigerator does not freeze lies not in a breakdown, but in incorrect operating conditions. The equipment is sensitive to room temperature. If the refrigerator is located next to a radiator, stove, or in direct sunlight, the cooling system may not be able to cope with the heat influx.
Gap for ventilation is also important. The condenser (black grille at the back or hidden in the side walls) should release heat to the environment. If the refrigerator is moved close to the wall or built into a niche without proper air exchange, operating efficiency drops and the upper chamber may not freeze.
Installation recommendations:
- 📏 The distance from the back wall to the wall should be at least 5-7 cm.
- ☀️ Do not install the unit in rooms where the temperature drops below +10°C or rises above +32°C.
- 🧹 Regularly (once every six months) clean the condenser of dust and animal hair with a vacuum cleaner.
Remember that loading the refrigerator also matters. If you put a lot of room temperature products into a warm chamber at once, the compressor will work hard trying to cool the volume. In such cases, it is better to cool the food in parts or use the “Super Freeze” mode for a limited time.
Is it possible to place a refrigerator on a glazed balcony?
Atlant equipment is designed to work in climate class SN-T (from +10 to +43°C). In winter, on an unheated balcony, the temperature drops below the permissible level, the oil in the compressor thickens, which leads to its breakdown during startup. In summer, under the sun, the temperature can exceed +43°C, which will cause overheating.
Frequently asked questions (FAQ)
Why does the Atlant refrigerator freeze only near the back wall?
This may be a sign of an incipient freon leak or blockage. In normal mode, cooling should be distributed evenly (in drip models) or over the entire area (No Frost). If the cold is felt only at the evaporator tubes, and the rest of the chamber is warm, the system does not have enough refrigerant for a full cycle.
How long should the refrigerator freeze after defrosting?
After complete defrosting and turning on the refrigerator Atlant it takes from 2 to 6 hours to get working temperature, depending on the model and room temperature. It may take up to 24 hours for food to completely stabilize and freeze. If the temperature has not started to drop within 6 hours, there is probably a malfunction.
What to do if there is water in the upper chamber, but there is no cold?
Water in the lower part of the fridge compartment most often indicates a clogged drainage hole. It is located on the back wall inside the camera. Clean it with a special flexible wire or a cotton swab. If water appears regularly and there is no cold, check the defrosting system (heating element and sensors), perhaps the water from the melting ice does not have time to leave.
Is it possible to use a refrigerator if it does not freeze the upper chamber?
You can use the unit in this mode only for a short time while you wait for a technician or carry out diagnostics. Prolonged operation of the compressor without shutting down (which often happens when there is a leak or loss of cold) leads to overheating and burnout of the windings. This will turn a simple repair into an expensive motor replacement.