The situation when only the freezer works in the refrigerator, and it is warm in the main chamber, is familiar to many owners of household appliances. You open the door expecting cool air, but instead you feel room temperature while the frozen food in the upper or lower compartment remains solid. This is a classic symptom of impaired cold circulation or a malfunction in the temperature control system. You should not panic right away, since in half of the cases the problem is solved without calling a technician, but the signal cannot be ignored - this can lead to spoilage of products.
Modern models, be it Indesit, Atlant or Beko, are designed so that cold is often generated in the freezer compartment, and then distributed to the remaining compartments. If this process is disrupted, the refrigerator turns into a single-compartment freezer. In this article, we will analyze in detail the mechanical and electrical causes of the malfunction so that you can understand the scale of the problem and the cost of possible repairs.
Before looking for breakdowns, remember the last time you defrosted. Sometimes the answer lies in simple freezing of the evaporator, which blocks the access of cold air to the refrigeration compartment. If the unit operates in No Frost mode, then an ice plug in the air supply channel is the most common reason for the lack of cold in the main chamber. Let's look at the main factors affecting the operation of two-chamber systems.
⚠️ Attention: If you notice that the motor-compressor is running non-stop without trying to shut down, this is a sure sign that the system cannot reach the set temperature. In this case, initial diagnostics should be carried out as quickly as possible to avoid engine overheating.
Problems with refrigerant circulation: freon leak
One of the most common reasons why cold has stopped flowing into the refrigeration compartment is a partial leak of refrigerant. Freon is a working fluid that circulates in a closed circuit, taking away heat. When its amount in the system decreases due to microcracks in the tubes or corrosion, the pressure is not enough to “reach” the evaporator in the upper chamber. As a result the freezer is still freezing, since it is located closer to the outlet of the compressor, and the refrigerant simply does not reach the refrigeration compartment in the required volume.
It is almost impossible to diagnose a leak visually, since the gas is colorless and odorless. However, there are indirect signs. In such cases, the compressor works almost non-stop, trying to compensate for the lack of cold. You may notice that the condenser (the grill at the back or the side walls) heats up unevenly: some of the tubes are hot, while others remain cold or barely warm. This indicates that the freon runs out before completing a full circle.
Repair in this case requires the intervention of a specialist. The technician must find the leak, seal it and fill the system with a new portion of refrigerant. You cannot try to add gas yourself, since it is useless without evacuating the system and eliminating the hole. In addition, different models require strictly defined types of freon, for example R600a or R134a.
No Frost system malfunctions: fan and blockages
In refrigerators with a system No Frost (or Low Frost) the cold is not generated directly in chamber, and is pumped there by a fan from the freezer compartment. If only the freezer is working in the refrigerator, but the main part is warm, the fan is the first suspect. It could fail electrically (the winding burned out) or mechanically (the bushing jammed).
The second option for problems with No Frost is the formation of an ice plug in the air channel. This happens if the defrost system is not working correctly. The defrost heating element, thermostat or timer may fail, causing the evaporator to become covered in ice. The fan continues to hum, but the air simply cannot break through the ice mass into the refrigerator compartment. Visually, it often looks like this: the freezer works perfectly, the food is frozen, and the back wall of the refrigerator compartment is dry and warm.
To check the fan in some models, just open the door of the refrigerator compartment and hold down the door sensor button (or simply open the door, if the design allows). If the fan stops when opening, this is normal. If it does not start even when the door is closed and the sensor is working, it must be replaced. It is also worth checking whether ice has frozen on the blades, which often happens when the door seal is damaged.
Why can’t you hear the fan noise?
Modern models use very quiet engines. If you do not hear a characteristic air hum, this does not always mean a breakdown. However, the complete absence of sound when the compressor is running in No Frost mode should alert you.
Failure in the operation of the temperature sensors and thermostat
The refrigerator electronics rely on sensor readings. If thermostat or the air temperature sensor in the refrigerator compartment fails and shows incorrect data (for example, that it is already -5°C, although in fact it is +15°C), the “brains” of the refrigerator simply do not give the command to cool. The compressor may stand still, or the system will only work for the freezer if the sensors are separated.
In models with electronic control, a situation often occurs when the sensor “lies” due to oxidation of the contacts or internal failure. The refrigerator “thinks” that the temperature is normal and does not turn on the active cooling mode for the upper chamber. In mechanical models, the capillary tube of the thermostat is responsible for this. If it has lost its seal or has moved, the refrigerator will not know when to stop or, conversely, turn on the cooling of the second chamber.
Replacing the sensor is a relatively inexpensive procedure, but requires disassembling the internal panel. It is important to use original spare parts or high-quality analogues, since the resistance of sensors of different brands (for example, Liebherr versus Samsung) may differ, which will lead to incorrect operation of the entire system.
Clogged capillary tube and problems with oil
Another technical reason why the freezer works and the refrigerator is warm - this clogging of the capillary tube. This is the narrow part of the circuit where the refrigerant changes from liquid to gas. Over time, an ice plug (due to moisture) or clogging with oil breakdown products may form in the system. Freon cannot circulate in full, and the pressure is only enough for the first circuit (freezer).
Often the blockage is accompanied by strange behavior of the compressor: it can turn on, hum for several minutes, then click and turn off, or work with overheating. Unlike a leak, when a tube is clogged, the condenser (grid at the back) often remains cold or warm only at the very beginning, since the circulation of gas is practically stopped.
Removing a blockage is a complex procedure. The technician will have to resolder the filter drier, flush the system with nitrogen under high pressure, and refill the vacuum. It is impossible to do this at home due to the lack of specialized equipment.
Comparative table of symptoms of malfunctions
To make it easier for you to navigate the possible causes, we have compiled a table comparing symptoms with probable breakdowns. Please note that an accurate diagnosis can only be made by a specialist with a pressure testing device.
| Symptom | Probable cause | Nature of compressor operation | Difficulty of repair |
|---|---|---|---|
| The freezer is freezing, the chamber is warm, the compressor is hot | Freon leakage | Works without stopping | Medium (needs refilling) |
| Heat in the chamber, the noise of the fan is heard, but there is no cold | Clogged air channel (ice) | Works cyclically | Low (defrost) |
| Complete absence of cold in the chamber, silence | Fan malfunction | Works normally | Low (part replacement) |
| The temperature fluctuates, the compressor often turns on | The sensor/thermostat is faulty | Irregular operation | Low (sensor replacement) |
The table shows that external manifestations may be similar, but the reasons are radically different. For example, in case of a leak or a blockage, the compressor can work continuously, but the treatment methods will be different. Diagnostics starts with listening to the operation of the unit and checking the uniform heating of the condenser.
Self-diagnosis: checklist of actions
Before calling a technician, you can carry out a series of safe checks that will help eliminate simple causes or more accurately describe the problem to a specialist. Do not try to disassemble the back panel or touch the copper tubes if you do not have the skills to work with equipment.
☑️ Initial check of the refrigerator
Start by checking the settings. Perhaps one of the household members accidentally switched the refrigerator to the “Vacation” or “Super Freeze” mode, which freezes only one compartment with priority. Also make sure that the food in the refrigerator compartment does not lie close to the back wall, blocking the air circulation channels. This is a common operating error.
⚠️ Attention: When checking electrical components (fan, sensors), be sure to unplug the refrigerator! Working with live electrical wiring is life-threatening.
When you need to call a technician and preventive maintenance
If simple methods like complete defrosting (for 10-12 hours with the doors open) did not help, and the problem “only the freezer works in the refrigerator” persists, then the problem is a technical malfunction. It is impossible to independently eliminate a freon leak, replace a compressor or clean the capillary system without equipment.
Prevention will help extend the life of the unit. Regularly clean the drainage hole (if there is one), check the integrity of the sealing rubber and do not put hot food inside. It is also important to ensure that the refrigerator is level and the doors close tightly under their own weight. Violation of the tightness leads to constant moisture ingress, which causes freezing and breakdown of the No Frost system.
Remember that timely repairs are cheaper than replacing a burnt-out compressor or buying a new refrigerator. If you notice that the food in the main chamber has begun to deteriorate, and condensation has appeared on the walls, do not delay diagnostics.
Is it possible to operate the refrigerator if one chamber does not work?
It is highly not recommended. The compressor will work hard, trying to cool the volume, which will lead to its rapid failure. In addition, this is a risk of bacterial growth in a warm chamber.
Why, after defrosting, did the refrigerator stop freezing in the main chamber again?
If after complete defrosting (more than 10 hours) the problem returned after 1-2 days, then the reason is not an ice plug, but a malfunction of the components: the defrost heating element, timer or thermostat burned out. Ice accumulated again and blocked the channel. A faulty part of the defrost system needs to be replaced.
How long does it take for the refrigerator to reach its temperature after repair?
After charging with freon or replacing the compressor, the refrigerator takes from 2 to 6 hours to reach operating temperature. During this time, do not fully load food or open the doors frequently. Complete stabilization of the temperature may take up to 24 hours.
Could the reason be due to incorrect installation?
Yes. If the refrigerator is too close to the wall, the ventilation of the condenser is impaired. If it is tilted, the door may not close tightly. It is also important to check whether the tube is pinched at the back when moving the equipment to the wall.
What to do if the compressor is hot, but the cold does not flow?
This is a classic sign of a freon leak or blockage. The compressor circulates gas, but there is little of it or it does not circulate. You need to immediately turn off the device and call a technician so as not to burn the motor.