The situation when the light is on inside the refrigerator, but the temperature stops decreasing, often takes you by surprise. The indicators on the panel may flicker, and food may quickly deteriorate. This is a classic sign that the control system is working properly (since there is electricity), but the actuator or heat exchange is not working. Atlant The light is on, but the temperature stops dropping, often taking you by surprise. The indicators on the panel may flicker, and food may quickly deteriorate. This is a classic sign that the control system is working (as long as there is electricity), but the actuator or heat exchange is not working.
In most cases, the problem lies in one of the components refrigeration circuit or the heat removal system. Owners of two-chamber models are often faced with the fact that one chamber works normally, while the other turns into a “warm closet”. Understanding the design of your model will help you quickly determine whether you need urgent help from a technician.
Do not immediately panic and look for the service center number. Sometimes the reason is trivial and can be easily fixed on your own. However, ignoring the symptoms can lead to expensive compressor repairs, so you need to act quickly and consistently.
Primary diagnosis and simple causes
Before disassembling the equipment, it is necessary to exclude external factors. Users often forget that fast freezing modeturned on a few days ago may not have turned off automatically due to an electronics failure. In this case, the compressor wears out, but the cooling cycle is disrupted.
Check the tightness of the door. If the seal (elastic band) is dirty or deformed, warm air constantly enters the chamber. Sensors record an increase in temperature and make the motor hum without stopping, but it does not have time to effectively cool the volume.
⚠️ Attention: If you notice that the door does not close tightly, do not use force. Try cleaning the seal with warm water and soapy water - this often restores the seal.
It is also worth inspecting the back wall of the refrigerator. If it is covered with a thick layer of dust or pet hair, heat transfer is impaired. The compressor overheats and goes into thermal protection, stopping pumping refrigerant, although the light in the chamber continues to burn.
Faults in the defrosting system (No Frost)
In models with the system No Frost The most common reason for the lack of cold when the backlight is working is a failure in the defrost cycle. The evaporator, hidden behind a plastic panel, becomes covered with ice, which blocks the flow of cold air to the food. The fan hums, but the air does not circulate.
Responsible for this process Defrost heating element. If it burns out, the ice does not melt, and after a few days of “icing” the refrigerator stops freezing. Also, the defrost sensor often fails, which “does not see” that the ice has already melted and does not give the command to turn on the compressor.
The third element of this chain is a timer or electronic control board. If they do not signal to defrost, the system runs idle. This problem can be determined by the characteristic hum of the fan in the absence of cold flow from the deflectors.
- ❄️ Sign of a problem: frost or ice crust is visible on the back wall of the chamber.
- 🔊 Sign of a problem: the fan is noisy, but air does not blow from the holes.
- 🧊 Sign of a problem: after complete defrosting (24 hours), the refrigerator begins to freeze.
For accurate diagnostics, you will need a multimeter to check the resistance of the heating element and sensors. The normal resistance of the heating element is usually from 200 to 400 Ohms. If the device shows a break (infinity), the part requires replacement.
☑️ Checking the No Frost system
Problems with the compressor and start relay
The heart of the refrigerator is compressor. If it doesn't start, there won't be any cold. It often happens that you hear a quiet click, the hum lasts a few seconds, then another click follows and there is silence. This is a classic symptom of a faulty start relay or a jammed motor.
The start relay is a small box on the side of the compressor. Inside there is a coil and a mechanism that starts the motor winding. Over time, the plastic ages, the contacts burn out, and the relay ceases to perform its function. Replacing this part is inexpensive and often solves the problem.
A more serious situation is an interturn short circuit of the compressor windings. In this case, the engine may hum but not start, or start and immediately stall. If you feel intense heat when you touch the compressor housing, but there is no startup, the unit probably requires replacement.
⚠️ Attention: Attempts to start a “tired” compressor using external devices (such as “tablets”) are a temporary measure. This can lead to complete burnout of the windings and a fire.
In modern models Atlant with inverter compressors, diagnostics are more difficult. There, an electronic board is responsible for starting, and there may not be a characteristic click of the relay. If the inverter motor does not start, the electronics or the compressor itself are often to blame.
Freon leakage: symptoms and consequences
If the compressor runs continuously, hums smoothly, but there is no cold (or it is very weak), there is a high probability refrigerant leaks. Freon is a gas that circulates in the system, taking away heat. If the circuit is depressurized, there is simply nothing to pump.
Leaks often occur in places of factory rolling (tube connections) or in the foamed part of the body, where the tubes can rust over time. It is difficult to notice a leak visually, since freon is colorless and odorless (although an odorant is added to it, it is only felt when the volume is large).
An indirect sign of a leak is hot side walls. Normally, the sides of the refrigerator should be warm, since there is a condenser running there that gives off heat. If they are barely warm or cold when the engine is running, there is not enough freon in the system.
| Symptom | Probable cause | Actions |
|---|---|---|
| The compressor does not turn on, there is light | Faulty starting relay or thermostat | Replacing the relay, checking the thermostat |
| The motor hums, but does not start | The compressor is jammed or the winding is burned out | Diagnostics motor, replacement is possible |
| The motor runs constantly, there is no cold | Freon leakage or capillary blockage | Searching for leaks, filling, purging |
| Frost only at the entrance to the evaporator | Partial blockage or lack of freon | System repair required |
It is impossible to eliminate the leak on your own. Equipment is required for evacuation of the system, soldering of tubes and precise charging specific type of refrigerant (R600a or R134a), indicated on the nameplate of your Atlanta.
Clog capillary tube
Another technical reason for the lack of cold is hydraulic blockage. In a narrow capillary tube, where freon passes from a liquid to a gaseous state, a plug may form from oil or moisture oxidation products.
Symptoms of a blockage are similar to a leak: the compressor works, but there is no cold. However, there is a difference: the condenser (grid at the back) can only be hot at the beginning, and then cold. The filter drier may also be swollen.
Eliminating this problem requires purging the system with high pressure nitrogen and replacing the filter drier. This is work for a specialist with a professional tool.
Is it possible to break through the blockage yourself?
Theoretically, there are methods of “bleeding” the system through the Schrader valve, but without a vacuum cleaner and nitrogen you risk driving moisture deeper into the system, which will lead to corrosion and expensive repairs.
Faults electronics and sensors
Modern refrigerators Atlant are controlled by electronic modules. If the “brain” of the device fails, it may not send a command to turn on the compressor, even if all sensors are working properly. This may be indicated by chaotically blinking indicators.
The temperature sensor (thermistor) often fails. It is located in the chamber or on the evaporator. If it transmits incorrect data (for example, that the chamber is -30°C, although there is +10°C), the controller will not start cooling.
You can check the sensor by measuring its resistance at different temperatures. It should change smoothly. Abrupt changes or a break indicate a malfunction.
- 🔌 Check the integrity of the wires coming from the sensors - they are often chewed or frayed.
- 💡 Pay attention to the control board: swollen capacitors or burn marks indicate a voltage surge.
- 🔄 Try it reset errors by disconnecting the refrigerator from the network for 15-20 minutes.
If after a reboot the problem returns and simple methods do not help, most likely, a replacement control module or flashing is required.
When you need to call a specialist
Repair of refrigeration equipment is divided into household and professional. You can replace the light bulb, seal, start relay or defrost sensor with your own hands (if you have the skills to work with a multimeter). Everything related to opening the freon circuitrequires a license and equipment.
A call to the technician is required if: a gas leak is detected, the compressor needs to be replaced, the capillary is clogged or the electronic control board is burned out. Attempts at self-repair in these cases will only lead to an increase in the cost of restoration.
It is also worth contacting a professional if you are not confident in your abilities. Diagnostics often costs less than subsequent correction of errors by unqualified intervention.
⚠️ Attention: Repair prices may vary depending on the cost of components and region. Check the exact cost of the work at official service centers or with private craftsmen before starting work.
Why does the refrigerator freeze but does not turn off?
This is a sign of a heat transfer disorder. Either the condenser at the back is clogged (dust), or the thermostat has failed and does not see that the desired temperature has been reached. It is also possible for air to leak through a leaky door.
Is it possible to use a refrigerator if it does not freeze well?
It is highly not recommended. The compressor operates in emergency mode, which leads to its rapid wear. In addition, bacteria actively multiply in a warm chamber, which is dangerous to health.
How often do you need to defrost the Atlant refrigerator?
Models with a drip system require defrosting 1-2 times a year. The systems No Frost do not need manual defrosting, but preventive washing and cleaning of dust from behind must be carried out annually.
What to do if the refrigerator does not turn on after defrosting?
Let it stand unplugged for another couple of hours. If it doesn’t help, check whether the compressor’s thermal protection has tripped. If after a day there is silence, the start relay or the compressor itself has probably burned out.