The situation when the refrigerator freezes halfwayis one of the most common and alarming for the owner of household appliances. You may notice that food in the freezer compartment is covered with an icy crust, while in the refrigerator compartment the temperature remains above normal, or vice versa - one side of the chamber freezes while the other remains warm. This behavior of the equipment often indicates a disruption in the circulation of the refrigerant or malfunction of the defrost system, which requires immediate intervention.
Ignoring the problem can lead to spoilage of a large number of products and failure of expensive items. compressor. It is important to understand that a double-circuit or single-circuit cooling system operates on a closed cycle principle, and any obstacle in the path of freon causes an imbalance of temperatures. In some cases, the cause is a simple blockage of the capillary tube, and in more complex situations - a gas leak or a breakdown of the electronics.
Before calling a technician, it is worth conducting an initial diagnosis to exclude simple factors, such as a loose door or incorrect thermostat settings. However, if you hear that the motor runs continuously without turning off, or, conversely, is silent, although it is warm inside, this is a technical malfunction. Next, we will look at the main reasons why Atlant refrigerator, Indesit or any other brand can demonstrate a similar asymmetry in operation.
⚠️ Attention: If you smell burning or see sparking in the compressor area, immediately disconnect the device from the power supply. Operation of faulty electrical equipment can lead to a short circuit or fire.
Faults in the defrost system and ice freezing
One of the main reasons why the refrigerator only freezes on one side or poorly maintains the temperature in the upper chamber is a violation defrost cycle. In models with a No Frost or Low Frost system, frost constantly forms on the evaporator, which must be regularly removed by the heating element. If the defrost heating element burns out, ice accumulates and blocks the channels through which cold air should flow into the refrigerator compartment.
As a result of this process, you can observe that the back wall in the freezer is covered with a thick layer of snow, and the main compartment is warm. Air simply cannot circulate through ice-clogged ducts. Often in such cases, you can hear the fan humming, trying to expel air, but encounters resistance from the ice plug. This is a classic symptom when the refrigerator freezes but does not cool the upper part.
In addition, the defrost timer or temperature sensor, which does not give the command to turn on the heater, may fail. The system “thinks” that there is nothing to defrost, and continues to freeze, building up an ice shell. Visually, this can manifest itself in the form of swelling of the rear wall or the appearance of ice around the doorway.
- ❄️ Burnout of the evaporator heating element is the most common reason for lack of defrosting.
- 🌡️ Malfunction of the defrost sensor, which does not detect a critical amount of ice.
- ⏱️ Failure in the operation of the timer or electronic module for controlling defrosting cycles.
- 💨 Freezing of the drainage hole, due to which the water does not drain and turns into ice.
How to check the defrost heating element?
A multimeter is required for diagnostics. You need to get to the evaporator (often behind the back panel in the freezer), disconnect the heating element wires and ring it. If the device shows a break (infinite resistance), the heating element needs to be replaced.
Problems with refrigerant circulation
If The refrigerator freezes to the middle or the temperature drops only in the lower part, the problem may lie in the freon circulation system. The refrigerant moves through the tubes, releasing cold, and if its pressure drops or the path is blocked, the cooling becomes uneven. This often happens due to a clogged capillary tube, the diameter of which is extremely small. Microscopic particles of debris or moisture that have entered the system can create a blockage.
In the event of a blockage, the compressor tries to push gas, working with increased load, but the freon does not reach the upper compartments or the far corners of the evaporator. You may notice that the condenser (grid at the back) heats unevenly: one part is hot and the other is cold. This is a sure sign that circulation is impaired. Also, when clogged, you can often hear gurgling or hissing inside the cabinet.
Another option is a freon leak. If a hole has formed in the system (for example, due to corrosion or mechanical damage when defrosting with a knife), the pressure drops. The gas becomes insufficient for a full cycle, and it only manages to cool the initial section of the evaporator before returning to the compressor. In such cases the refrigerator runs nonstoptrying to dial up the temperature, but to no avail.
Incorrect operation of the thermostat and sensors
Electronics controls all processes in a modern refrigerator, and a failure in temperature sensors can lead to paradoxical situations when the refrigerator freezes, but does not turn offor turns off too early. The thermostat (thermostat) is responsible for turning the compressor on and off. If its contacts are stuck or the sensitive element is out of order, it may not give a signal to start the motor, even when it is warm inside.
In models with electronic control, air sensors are responsible for the temperature. If one of them, located in the refrigeration chamber, shows incorrect data (for example, too low), the control module will decide that the cold has been reached and will stop the compressor. As a result, food in the freezer will begin to melt, although the sensor “reports” ideal cold. Replacing such an element usually solves the problem.
It is also worth mentioning failures in the settings. The user could accidentally activate the "Vacation" or "Super Freeze" mode, which changes the operating algorithm. In super freeze mode, the compressor operates continuously, which can lead to overfreezing of one zone and overheating of another due to imbalance. Checking the settings in the menu on the display or the position of the mechanical regulator knob is the first thing to do.
| Symptom | Probable cause | Characteristic symptom |
|---|---|---|
| Freezing only from below | Clogged capillary tubes | Gurgling, compressor is hot |
| Warm at the top, cold at the bottom | Faulty defrost heating element | Ice on the back wall of the freezer |
| Works without stops | Freon leak | Warm condenser, cold compressor |
| Uneven cold | Fan malfunction | Noise or lack of noise from the fan |
Mechanical damage and seals
Even if technically the refrigerator is working, the physical condition of the camera can reduce its effectiveness to zero. The rubber seal on the door loses its elasticity over time, cracks or becomes deformed. Through the resulting cracks, warm air from the room constantly flows inside. The compressor tries to compensate for heat loss, working for wear, but due to the constant influx of warm air, the temperature is unevenly leveled.
Often, it is coldest in the area opposite the leak, or, conversely, a snow coat forms next to the gap due to condensation of moisture from the incoming air. You can check the seal with a simple test with a sheet of paper: hold the sheet with the door and try to pull it out. If it is easily removed without resistance around the entire perimeter, the seal requires replacement or adjustment.
Mechanical damage can also be internal. If you carelessly defrosted the chamber with a sharp object and damaged the evaporator tube, depressurization occurred. In this case the refrigerator stops freezing completely or partially very quickly. Mechanical problems also include a skewed door, due to which it does not fit tightly, which often happens after overloading shelves or improper installation of the appliance.
Diagnostics of the compressor and starting relay
The heart of the cooling system is the compressor. If it does not work correctly, this directly affects how the refrigerator freezes. A situation often occurs when the engine hums, tries to start, clicks and turns off. This is a sign of a malfunction of the start relay or the compressor itself (turn-to-turn short circuit). In this mode, the gas does not circulate, and cooling does not occur at all or it is very weak.
The opposite situation also happens: the compressor works quietly, but does not create the required pressure. This may be due to the exhaustion of the piston group resource. The valves wear out, and the compressor simply circulates freon in a circle, without creating enough vacuum to boil the refrigerant in the evaporator. Visually it looks like this: the refrigerator is working, the tubes are warm, but there is no cold.
For diagnostics, professionals use pressure gauges to measure the pressure in the system. At home, you can evaluate the operation of the compressor by ear and temperature. If the motor body is hot to the point where it is impossible to touch it, and the tubes are barely warm, this is a bad sign. If the motor is cold and silent, although it should be working, the problem may be in the power circuit or thermostat.
⚠️ Attention: Replacing the compressor yourself requires soldering the pipes, evacuating the system and charging with freon. Without special equipment, it is impossible to perform this procedure efficiently, so if you suspect a motor breakdown, it is better to contact the service.
The influence of the external environment and operating conditions
Do not forget that external factors influence the operation of the equipment. If the refrigerator is too close to the wall, the radiator at the back cannot effectively transfer heat. This causes the system to overheat and reduce cooling efficiency. It is also important to consider the room temperature: most refrigerators are not designed to operate at temperatures below +10°C or above +32°C.
The food load also plays a role. If you put a large amount of warm food in the chamber, the refrigerator will take a long time to restore the temperature, and during this period it may seem that it is not freezing well. However, if food is placed close to the back wall or covers the vents, air circulation is disrupted and the cold is not distributed evenly.
Drafts or direct sunlight falling on the case can throw off the temperature sensors or create local overheating on one side of the case. This is especially true for built-in appliances, where it is important to follow the rules for niche ventilation. Failure to follow these simple rules often leads to the owner thinking about a breakdown, although the equipment simply works in extreme conditions.
☑️ Checking the operating conditions
When you need to call a technician
You can only fix some problems yourself, for example, replace the seal, defrost the chamber, or check the settings. However, if the problem lies in a freon leak, a clogged capillary system or a compressor breakdown, you cannot do without the intervention of specialists. These works require professional tools, knowledge and consumables.
If after complete defrosting (within 24 hours with the doors open) the problem does not disappear and the refrigerator began to freeze halfway again after several hours of work, then the reason is technical. Attempts to “treat” equipment using traditional methods in this case can only aggravate the situation, leading to more expensive repairs.
A timely call to a technician will help save money in the long run. A worn-out compressor will burn out very quickly if there is a freon leak, and then repairs will become economically unfeasible. Therefore, if you notice persistent signs of a malfunction, it is better not to delay diagnostics.
Is it possible to operate a refrigerator if it only freezes half?
Short-term operation is possible, but not recommended. Food in a warm area may spoil and the compressor will be overworked, shortening its life. It is better to turn off the device until the reasons are determined.
How long does it take to defrost the refrigerator to check?
It takes at least 24 hours for the ice in the hidden channels of the No Frost system to completely thaw. Defrosting for 2-3 hours is often insufficient to eliminate the ice jam.
Why, after defrosting, did the refrigerator start to freeze unevenly again?
This indicates that the reason is not the amount of ice, but a malfunction of the elements of the defrost system (heating element, sensor, timer) or problems with freon circulation. Ice builds up again due to a malfunction in the operating cycle.
Does the amount of food affect the uniformity of cooling?
Yes, an overcrowded refrigerator or food blocking the air ducts disrupts the circulation of cold air. Also, you should not put hot dishes, this creates a large load on the system.
What to do if the refrigerator hums, but does not freeze?
This may be a sign of a freon leak or a compressor failure. It is necessary to check whether the condenser is heating up at the back. If it is cold while the engine is running, there is likely a leak or a compressor wedge.