Owners of household appliances are often faced with a situation where the refrigerator Atlant continues to work, but ceases to maintain the required temperature in the upper compartment. The food in the refrigerator begins to deteriorate, an unpleasant smell appears, and there is water on the shelves. This is a classic symptom of a malfunction in the temperature control system or impaired refrigerant circulation.
Modern models of the Belarusian brand, be they two-chamber units or devices with a system No Frost, are quite complex. They contain many sensors, electronic boards and mechanical components, the failure of any of which can lead to the problem described. Understanding the principle of operation will help you quickly diagnose a breakdown and decide whether to call a technician or try to fix the fault yourself.
In this article we will analyze in detail the main reasons why the upper chamber does not freeze, consider the symptoms of specific breakdowns and give step-by-step instructions for checking key elements. In 80% of cases, the problem lies in a failure of the thermostat or a clogged capillary tube, which can often be diagnosed visually or aurally. However, ignoring the problem can lead to failure of the compressor, so you need to act promptly.
Primary diagnostics and checking the settings
Before disassembling the unit or calling a technician, it is necessary to eliminate basic operating errors. Often, users accidentally change the temperature settings or forget about the fast freezing mode. Check the control panel: perhaps the temperature in the refrigerator compartment is set to the maximum value (for example, +8...+10°C), which is not enough to maintain the freshness of perishable food.
Pay attention to the mode Super Freeze or Super Freeze. When this mode is activated, the compressor runs non-stop to try to cool the freezer as much as possible, but on some models this can lead to temperature imbalances or freezing of the evaporator, which blocks the flow of cold to the top compartment. Turn off this mode and wait a few hours.
It is also worth checking the tightness of the door. If the rubber seal is worn out, dirty or deformed, warm air enters the chamber. The compressor cannot cope with the heat flow, and the temperature in the upper chamber rises. Carry out a simple test: squeeze a sheet of paper between the door and the body around the perimeter - it should come out with force.
Make sure that the food in the refrigerator compartment is positioned correctly. They should not fit tightly to the back wall or block the ventilation holes (if the model is with the system No Frost). Impaired air circulation is a common cause of local temperature increases.
Failures of the thermostat and temperature sensors
One of the most common reasons why the upper chamber of the refrigerator has stopped cooling Atlantis the failure of the thermostat (thermostat). This mechanical or electronic sensor is responsible for turning the compressor on and off depending on the temperature inside the chamber. If it is “stuck” in the “off” position, the motor will not work and the cold will no longer be produced.
In models with electronic control, air sensors are responsible for temperature control. If the refrigeration chamber sensor shows incorrect values (for example, “in the chamber -5°C”, although there is +15°C), the controller will not give a command to start the compressor. Diagnosis of such malfunctions requires a multimeter to check the resistance of the sensor at different temperatures.
Symptoms of a malfunctioning thermostat often manifest themselves in the fact that the refrigerator either does not turn on at all, or works nonstop, but does not cool. In mechanical thermostats, freon may leak from the bellows tube, causing the membrane to stop responding to temperature changes.
To replace the thermostat, you usually need to:
- 🔧 Remove the protective cover of the thermostat inside the chamber.
- ❄️ Disconnect the capillary tube from the evaporator (carefully so as not to damage).
- 🔌 Remove the old sensor and install a new one with similar markings.
- 🧪 Check the tightness of the connections after assembly.
⚠️ Attention: When replacing the thermostat in older models, it is important to install and secure it correctly bellows tube. If it dangles or touches the walls of the chamber, the temperature readings will be incorrect, which will lead to cyclical malfunctions.
Problems with the defrost system (for No Frost models)
If your Atlant is equipped with a system No Frostthen there is no cold in the upper chamber when a running compressor often indicates problems with evaporator defrost. In such refrigerators, cold air is forced by a fan from the freezer into the refrigerator through special channels. If the evaporator in the freezer becomes overgrown with a “coat” of ice, the channels overlap and the air simply does not reach the upper compartment.
The defrosting system consists of a heating element (heater), a defrost sensor (defrost thermostat) and a timer (or electronic control module). If any of these elements fail, the ice does not melt, accumulates and blocks the operation of the fan or air dampers.
Signs of a malfunctioning defrost system:
- 🧊 A layer of ice or snow is visible on the back wall of the freezer.
- 🔇 The fan is humming, but not spins (frozen) or spins, but no air flows.
- 💧 Water appears under the refrigerator or inside the chamber during defrosting.
To eliminate the problem, it is often necessary to completely defrost the refrigerator within 24 hours. If after switching on the problem returns after 1-2 weeks, it means that one of the elements of the defrost system is faulty and requires replacement. Most often, the heating element burns out or the defrost sensor “sticks.”
Refrigerant leak and capillary system clogged
If the compressor runs almost non-stop, hums, but there is no cold in either the upper or lower chamber (or it is very weak), there is a high probability of a freon leak. The refrigerant circulates in a closed circuit, and if a hole has formed in the tubes (due to corrosion or mechanical damage), the gas escapes. Without freon, heat exchange is impossible.
Another problem with similar symptoms is a clogged capillary tube. An ice or dirt blockage may have formed in the system, blocking the circulation of refrigerant. In this case, the compressor tries to push freon, gets very hot, but there is no circulation. A characteristic sign of a blockage is that the condenser grille at the back remains cold or warm only at the beginning.
Diagnosing a leak or blockage at home is difficult. You can try to check the uniformity of heating of the back wall inside the refrigerator by touch. If it is completely cold or warms up only at the entrance of the tube, this is a sign of a lack of freon or plug.
Repair in this case is complex and requires special equipment:
- 🔍 Finding the leak using a leak detector or soap solution.
- 🔥 Soldering tubes and replacing damaged ones areas.
- 💨 Vacuuming the system to remove moisture and air.
- ⛽ Filling the refrigerator with new freon strictly by weight.
⚠️ Attention: An independent attempt to fill with freon without vacuuming the system will lead to the formation of an ice plug in the capillary and compressor failure after a short time. This work should only be performed by a specialist with the equipment.
Faults of the compressor and start relay
The compressor is the “heart” of the refrigerator. If it doesn't start, there won't be any cold anywhere. Often the problem lies not in the motor itself, but in the start-up relay. This is a small device that provides an impulse to start the engine. If the relay is burned out, the compressor hums, clicks, but does not start, or is silent.
In modern models Atlant with inverter compressors the situation is more complicated. There, the launch is controlled by an electronic module. If the control module “sees” a malfunction (for example, a broken winding or a compressor wedge), it blocks the start to prevent a fire or further destruction of the unit.
Signs of a malfunction of the starting relay or compressor:
- 🔊 There is a loud click, then a buzzing sound and again click (attempt to start).
- 🔥 The compressor is very hot to the touch.
- 💡 The light in the refrigerator is on, but the motor is silent.
You can check the relay by carefully removing it and shaking it near your ear. If a ringing sound is heard inside or traces of burning are visible, the part must be replaced. Replacing a compressor is an expensive repair that requires recharging the system.
☑️ Compressor diagnostics
Comparative table of faults
To systematize the information, we have compiled a table that will help you quickly navigate the symptoms and probable causes of failure. Please note that the same symptoms may indicate different problems depending on the model of your refrigerator.
| Symptom | Probable cause | Difficulty of repair | Required tools |
|---|---|---|---|
| The refrigerator is silent, there is light | The thermostat or relay is faulty | Low | Screwdriver, multimeter |
| It buzzes, but does not freeze | Freon leak or blockage | High | Refilling equipment |
| Ice in the freezer, warm at the top | Failure of the defrost system (No Frost) | Average | Hair dryer, tester, new heating element |
| Compressor is hot, clicking | Faulty start relay | Low | New relay, pliers |
| Temperature floats | Temperature sensor faulty | Average | Multimeter, new sensor |
From the table it is clear that many problems can be solved, but require a different approach. Mechanical troubleshooting, such as replacing a relay or thermostat, is within the reach of most DIYers. Problems with a sealed circuit (freon) require professional intervention.
Minor faults should not be ignored. For example, if a burnt defrost heating element is not replaced in time, ice may reach the fan, and then it will have to be replaced, which will increase the cost of repairs.
Is it possible to operate a refrigerator with one working chamber?
Short-term operation is possible, but undesirable. If the upper chamber does not freeze, the food will spoil. If the bottom one does not freeze, the food supply is defrosted. Prolonged operation with a malfunction (for example, a leak) will lead to the compressor burning out due to overheating.
Prevention and proper care of Atlant equipment
In order for your Atlant to serve for a long time and not require frequent repairs, it is important to follow the operating rules. Regular defrosting (for drip systems) at least once a year helps maintain heat transfer efficiency. Even if the manufacturer writes that defrosting is not needed, a preventative shutdown for a day will be beneficial.
Keep the condenser grill at the back of the refrigerator clean. Dust and animal hair accumulate on the tubes and impair heat transfer. The compressor begins to work harder to compensate for overheating, which reduces its service life. Wipe the grill with a dry cloth or vacuum it every six months.
It is also important to check the condition of the door seals. They should be washed with warm water and soap, removing grease and food debris. Once a year, you can lubricate the seal with silicone grease to prevent the rubber from drying out and cracking. This will ensure tightness and reduce the load on the cooling system.
Do not overload the shelves with products. Cold air should circulate freely inside the chamber. If you put a hot pan or fill the refrigerator, the temperature will rise and the unit will work hard, trying to cool the volume.
When you need to call a technician
Despite the desire to save money, there are situations when independent repairs can be dangerous or economically impractical. If diagnostics show a freon leak, sealing and refilling is required. To do this, you need a vacuum pump, a pressure gauge station and a refrigerant cylinder. Buying such equipment for one use does not make sense.
In addition, modern refrigerators Atlant are often equipped with complex electronics. If the problem lies in the control module, it requires flashing it or soldering the board components. Without experience and schemes, you can only aggravate the situation by burning other nodes.
A call to a specialist is necessary if:
- 🛠 It is necessary to open a sealed circuit (soldering, refilling).
- 📟 The electronic control module is faulty.
- 🔊 There is an extraneous knocking or grinding noise in the compressor.
- 🔥 You smell burning or see sparking.
⚠️ Attention: If the refrigerator is under warranty, any independent repair (opening seals, Replacing parts) will void the warranty. In this case, immediately contact an authorized service center.
Frequently asked questions (FAQ)
Why does the Atlant refrigerator not freeze the upper chamber after defrosting?
If after defrosting the cold does not appear within 2-4 hours, there may be a failure in the control system or the sensor is damaged. Let the refrigerator run empty for several hours. If the temperature does not drop, check if the compressor is working. Perhaps, during defrosting, you behaved too aggressively (scraped the ice with a knife) and pierced the evaporator tube, which caused a freon leak.
Is it possible to replace the thermostat with an analogue from another manufacturer?
Yes, you can, but it is important to observe the parameters: the length of the capillary tube, the temperature range of operation and the type of contacts. The markings may differ, so it is better to select an analogue based on technical characteristics, and not just appearance. An incorrect thermostat will turn on the compressor too early or late, which will affect the safety of food.
How long should the Atlant refrigerator cool down after the first turn on?
After the first turn on or long transportation, be patient. The refrigerator needs from 4 to 12 hours to reach operating mode and stabilize the temperature in all chambers. At this time, do not load food and do not open the doors frequently.
What to do if ice freezes on the back wall in the upper chamber?
In models with a “crying” system, this is normal during the operating cycle; the ice should melt when the compressor is turned off. If the ice does not melt and turns into a block, the drain hole may be clogged. It must be carefully cleaned with a brush or soft wire. In No Frost models there should be no ice on the walls at all.
Why does the refrigerator freeze but does not turn off?
This is a sure sign of a malfunction of the thermostat (it does not give a signal to stop) or a freon leak (the temperature is not reached and the motor runs without rest). Also, the reason may be the wear of the door seal or installation of the refrigerator near a heat source (battery, sun).