The situation when refrigerator compartment ceases to maintain the required temperature, while freezer continues to work properly, often catches the owners of the household technicians by surprise. This is a common problem and may indicate a number of mechanical or electrical problems within the unit. Ignoring the first symptoms often leads to spoilage of food and more expensive repairs in the future.
Unlike complete failure of equipment, partial loss of cold creates the illusion of normal operation of the device. However, if you notice that the products in the main compartment have begun to deteriorate faster, and condensation has appeared on the walls or, conversely, frost has disappeared, it is necessary to urgently carry out diagnostics. In systems with one compressor, a violation of the refrigerant circulation or a failure in the control of the dampers are the most likely culprits.
The further text of the article will help you understand the nature of the breakdown, you can determine whether to fix the problem yourself, or calling a technician is inevitable. We will analyze the main components responsible for the distribution of cold and typical operating errors.
The principle of operation and the distribution of cold in the chamber
To understand why refrigerator it behaves incorrectly, you need to briefly consider the physics of the process. Most modern models use a system No Frost or static cooling, where the cold is produced in an evaporator, often located behind the back wall or in the freezer. Then this cold air is forced or naturally entered into the refrigerator compartment.
If the freezer is freezing, it means compressor and the main cooling circuit is functioning. The problem is localized in the air flow distribution system or in the controller that controls the temperature conditions of different zones. An imbalance leads to the fact that all the cold remains in the freezer without reaching the main compartment.
The key elements here are:
- ❄️ Fan - ensures air circulation between the chambers.
- 🚪 Damper damper —regulates the volume of supplied cold air.
- 🌡️ Temperature sensors —read the indicators and give commands to turn the cooling on/off.
Failure in the operation of any of these components leads to an imbalance of temperatures. For example, if the damper is stuck in the closed position, the cold simply will not be able to enter the refrigerator compartment, although the freezer will work in enhanced mode.
No Frost system malfunctions and freezing
In systems No Frost one of the most common reasons for the lack of cold in the main chamber is frosting of the air ducts. This occurs when the evaporator defrost system fails. The defrost heating element, timer or defrost sensor stops working correctly, and the ice coat builds up so much that it blocks the channels for air passage.
Visually this may not be immediately noticeable, since the evaporator is hidden behind a plastic panel. However, if you hear something humming or popping as it tries to move through the ice, or is completely silent, this is a sure sign of a problem. The air simply cannot overcome the ice plug and get into the refrigerator compartment. fan whether it hums or crackles as it tries to move through the ice, or is completely silent, this is a sure sign of a problem. The air simply cannot overcome the ice plug and enter the refrigerator compartment.
⚠️ Attention: Trying to pick out the ice with a knife or other sharp objects is strictly prohibited! You can damage the evaporator or pierce the circuit, which will lead to immediate release of freon and expensive repairs.
Diagnostics often require a complete defrost of the unit within 24 hours. If after this the refrigerator begins to cool normally, but after a week the problem returns, it means that one of the elements of the defrosting system is faulty. The heating element, sensor or timer needs to be replaced.
How to check the defrost system with a multimeter?
To check, you need to “ring” the defrosting heating element for an open circuit. The normal resistance of the heating element is usually from 200 to 500 Ohms. If the device shows one or infinity, the heating element has burned out and requires replacement. The defrost sensor is also checked, which should open the circuit at a certain temperature. data-i="87">Another common reason is a partial leak. When there is not enough gas in the system, it is only enough to freeze the food in the first part of the circuit (the freezer), but the refrigerant no longer reaches the refrigeration chamber with the required efficiency. In such cases, the compressor can work almost non-stop, trying to gain temperature.
The inspection requires disassembling the back wall of the freezer and basic electrical skills. If you are not confident in your abilities, it is better to entrust this work to a professional.
Refrigerant leak and compressor problems
Another common cause is partial leakage. freon. When there is not enough gas in the system, it is only enough to freeze food in the first part of the circuit (freezer), but the refrigerant no longer reaches the refrigeration chamber with the required efficiency. In such cases, the compressor may work almost non-stop, trying to gain temperature.
Symptoms of a leak often include:
- 🔊 The compressor runs longer than usual or does not turn off at all.
- 🌡️ The temperature in the refrigerator compartment is higher than normal (+10...+15°C and above).
- 💧 The appearance of a “crying” effect or, conversely, a complete absence of condensation on the back wall.
If you have a two-compressor refrigerator, then the situation is simpler: most likely, it is the refrigerator compressor that has failed or a breakdown in its circuit. In single-compressor models, a freon leak is a complex case that requires searching for the location of the damage. sealing and filling the system.
It is impossible to eliminate the leak on your own. Special equipment for vacuuming and filling is required. Attempts to “gas” the system without eliminating the hole give only a temporary effect.
Failures in the operation of the thermostat and electronics
For maintaining the temperature regime. responds thermostat (thermostat) or electronic control module. If the thermostat is “stuck” in the “Off” position or gives incorrect readings, the compressor simply will not turn on when commanded, even if the chamber is warm. In electronic models, the temperature sensor is responsible for this.
Often the problem lies in oxidation. contacts or a break in the wiring going to the sensor. In such cases, error codes may appear on the display (if there is one). For example, LG or Samsung these may be codes indicating an error in the refrigerator compartment sensor.
Replacing the thermostat is a relatively simple and inexpensive procedure. more accurate diagnostics, since their readings can “lie” due to changes in resistance, even if visually they are intact.
Mechanical damage and operating errors
The reason does not always lie in the breakdown of parts. Often users themselves create conditions under which refrigerator cannot work normally. Check the following points before calling. masters:
- 🚪 Rubber seal - if it is dirty, damaged or does not fit tightly, the cold leaves and the chamber cannot gain temperature.
- 🍲 Hot foods - placing a pot of soup causes a sharp jump in temperature and humidity, which can lead to freezing and malfunctions.
- 🌬️ Ventilation - if the refrigerator is located close to the wall, heat is not removed from the condenser, and the efficiency decreases.
It is also worth checking the position of the temperature regulator. Sometimes children or. accidental touching can move the knob to the “0” or “Min” position. In two-chamber models with one regulator, shifting the balance towards “Severe frost” can reduce the flow of cold into the upper chamber.
⚠️ Attention: Make sure that the ventilation holes inside the chamber (usually on the back wall) are not blocked by products. Blockage of airflow is a common cause of local lack of cold.
Diagnostics and table of symptoms
For convenience, we will systematize the main symptoms and probable causes. This will help you more accurately describe the problem to the technician or make a decision on repair.
| Symptom | Probable cause | Repair complexity |
|---|---|---|
| The freezer is working, in the refrigerator +15°C, the compressor is silent | The thermostat or sensor is faulty | Low |
| The compressor is humming, does not turn off, there is no cold | Freon leak or clogged capillary tube | High |
| Ice cracking is heard, the fan is noisy | Evaporator freezing (No Frost system) | Average |
| There is cold, but weak, there is water on the walls | The door does not close tightly or the drainage is clogged | Low |
Diagnostics begins with an external inspection and listening to the operation of the unit. If you hear how compressor starts and after a few seconds stalls (clicking), this may indicate problems with the start relay or the motor itself.
☑️ Initial check of the refrigerator
When you need to call a technician
There are a number of situations when self-repair is not only ineffective, but also dangerous. If the diagnosis indicates a refrigerant leak, professional equipment will be required to find the leak (leak detector), evacuate the system and refill it.
A master is also needed if:
- 🛠️ The compressor needs to be replaced (soldering and precise selection of oil are required).
- 🔌 A breakdown of the electrical part has occurred (sparking, burning smell).
- ❄️ The system freezes again after complete defrosting (the problem is in the electronics or heating element).
Modern refrigerators are complex devices where mechanics are closely connected with electronics. An error in diagnosis can lead to replacement of a working part. For example, replacing a compressor with a simple freon leak will not solve the problem, but will only increase costs.
⚠️ Attention: When working with electrical components, always unplug the refrigerator! Residual voltage in the control module capacitors can be dangerous.
Frequently asked questions (FAQ)
Is it possible to operate a refrigerator if it does not cool, but freezes?
Short-term operation is possible, but undesirable. If the cause is a freon leak, the compressor will work hard trying to compensate for the lack of refrigerant, which can lead to its combustion. If the problem is in the thermostat, the food in the refrigerator compartment will spoil.
How long does it take to defrost the refrigerator to check?
To completely defrost and restore the defrost system, the unit must be turned off with the doors open for at least 24 hours. A shorter defrosting may not remove ice from hard-to-reach channels.
Why did the refrigerator start working after defrosting, but then stopped again a week later?
This is a classic sign of a defrosting system malfunction (the heating element, timer or sensor burned out). Defrosting temporarily removes the ice plug, but since the defrosting mechanism does not work, the ice builds up again and blocks the air ducts.
Does the amount of food in the refrigerator affect its operation?
Yes, it does. An empty refrigerator loses cold faster when the door is opened. However, too dense packing that blocks the ventilation holes interferes with air circulation, which leads to uneven cooling.