The situation when in the refrigerator Samsung with the system No Frost The upper chamber stops freezing, but the lower one continues to work properly, this is one of the most common problems for owners of this equipment. Users often experience that food in the freezer compartment begins to thaw, ice turns into water, or the temperature simply rises above the required -18 degrees, although the compressor continues to hum. This does not always mean a fatal breakdown of the entire unit, but the symptom cannot be ignored, as this can lead to damage to a large amount of stock.
The system No Frost is more complex than a drip system, and is dependent on the circulation of cold air between the chambers. If the operation of one of the elements of this circuit is disrupted - be it due to clogged channels, fan failure or electronic failure - it is the upper part of the refrigerator that suffers. In this article, we will analyze in detail the mechanical and electrical causes of the malfunction, and also describe an algorithm of actions that will help you understand whether you can fix the problem yourself or it’s time to call a technician.
The first thing to do before disassembling the equipment is to carry out a primary inspection. diagnostics. Often the reason lies in simple overheating or failure of the software controller. Try defrosting the refrigerator completely within 24 hours by unplugging it and then turning it on again. If after 5-7 hours of operation the cold does not appear, then the problem is of a technical nature and requires deeper intervention in the device of the unit.
Main reasons for the lack of cold in the freezer
The most common culprit for the lack of cold in the upper chamber of refrigerators Samsung is a violation of the circulation of refrigerant or air. In the system No Frost cold is produced in the evaporator, which is usually hidden behind the back wall, and then blown by a fan into the chambers. If this process is interrupted, the upper compartment stops cooling, even if the compressor is running continuously.
One of the key reasons is freon leak. If a micro-hole has formed in the system (often in the foamed part of the housing or in the heating circuit), the refrigerant gradually evaporates. Unlike old models, where a leak led to a complete absence of cold, in modern two-chamber systems Samsung, the cold first disappears in the freezer, since it gets there “according to the residual principle.”
It is also worth paying attention to work compressor. If it turns on, hums for a few seconds and turns off, or works constantly without turning off, but there is no cold, these are sure signs of a serious malfunction. In the first case, there may be a problem with the starting relay or the motor itself, in the second - with a leak or blockage of the capillary tube.
- 🔍 Refrigerant leakage: a gradual decrease in cooling efficiency, often accompanied by swelling of the side walls.
- ❄️ Malfunction of the defrost system: an ice coat blocks the air supply channels to the upper chamber.
- ⚙️ Failure of the compressor: the motor does not create the necessary pressure for freon circulation.
- 🔌 Electronics failure: the control module incorrectly reads the sensor readings and does not start cooling.
⚠️ Attention: If you hear gurgling or hissing sounds from inside the refrigerator after the compressor is turned off, this may indicate a freon leak. In this case, refueling yourself without finding and eliminating the leak does not make sense.
Problems with the defrost system and fan
The system No Frost implies regular automatic defrosting of the evaporator. The heating element (heating element), defrost sensor and timer (or electronic module) are responsible for this process. If one of these elements fails, an ice “coat” builds up on the evaporator, which over time completely blocks the channels through which cold air should enter the upper chamber. As a result, the fan circulates air, but there is no cold in the freezer.
Particular attention should be paid fan. If it stops due to freezing of the blades or combustion of the winding, the air circulation stops completely. In refrigerators Samsung this is a common problem, especially if the door was open for a long time or warm food was loaded. Ice blocks the impeller and it stops rotating.
To check, you need to remove the back panel in the freezer. If you see a thick layer of ice on the evaporator, the defrost system is not working. If there is no ice, but the fan does not spin when turned on, its motor may have burned out or the contacts have oxidized.
☑️ Diagnostics of the defrost system
It is important to understand that replacing a heating element or fan requires partial disassembly of the unit. If you are not confident in your abilities, it is better not to risk the integrity of the plastic fasteners, which become very fragile in the cold.
Hidden signs of fan malfunction
If the fan hums but does not spin, it may be jammed with ice. If it is silent, the winding has burned out or there is no power. Sometimes the problem is in the door sensor: if the refrigerator “thinks” that the door is open, the fan will not start.
Faults of sensors and thermostat
Modern refrigerators Samsung are crammed with electronics that control every step of the unit’s operation. The temperature sensor (thermistor) is responsible for the temperature in the upper chamber. If it transmits incorrect data to the control module (for example, it shows that the temperature is -18°C, although in fact it is -5°C), the compressor simply will not turn on.
Also an important role is played thermostat (in mechanical models) or the electronic control module. During power surges in the network, these elements are often the first to fail. A symptom of sensor failure can be chaotic behavior of the refrigerator: either it freezes too much, or it stops cooling at all.
Required for accurate diagnosis multimeter. The resistance of the sensor changes depending on the temperature. If the device shows an open or short circuit, the part must be replaced. In models with a display, a sensor error is often displayed in the form of a code (for example, a combination of flashing indicators).
- 📉 Drift of readings: the sensor shows a temperature higher than the real one, the compressor does not turn on.
- 🔥 Open circuit: the control module sees the error and puts the refrigerator in emergency mode mode.
- 🧊 Sensor freezing: if the sensor is built into the wall and there is ice around it, the readings may be incorrect.
Clogged capillary tube and leakage of freon
If the electrical part is working properly, the fan is spinning, and the sensors are normal, but there is no cold, most likely the problem lies in the refrigeration circuit. Clogged capillary tube is a mechanical obstacle for freon movement. Typically, a blockage forms at the junction of the tube into the evaporator due to moisture entering the system or oil oxidation products.
Signs of a blockage are specific: the condenser (grid at the back) may be only partially warm or be cold, the compressor runs very hot and loud, but there is no cooling. Sometimes frost may appear on the tube near the compressor, which also indicates a circulation problem.
Freon leak is a more insidious problem. Freon can escape through microcracks in the aluminum evaporator (especially if it was cleaned with sharp objects) or through a manufacturing defect in soldering. In this case, the pressure in the system is not enough for effective heat exchange.
| Symptom | Probable cause | Characteristic symptom |
|---|---|---|
| Compressor is hot, no cold | Capillary clogged | Loud operation, frost on the tube |
| Compressor is cold, does not turn on | Leak freon | The module does not start due to low pressure |
| Bloating of the side wall | Evaporator corrosion | Rust spots inside or outside |
| The cold disappears gradually | Microleakage | First in the upper chamber, then completely |
⚠️ Attention: Repairing the refrigeration circuit (filling with freon, soldering, purging) requires special equipment and a license. Independent attempts can lead to complete breakdown of the compressor.
Failure of the control module
The "brain" of the refrigerator Samsung is an electronic control module. It is he who receives signals from all sensors and controls the compressor, fan and heating elements. If the radio components on the board burn out (often due to a power surge) or a software failure occurs, the refrigerator stops performing its functions.
Visually, a module malfunction can be determined by the lack of response to the buttons, the blinking of all indicators, or, conversely, the complete “silence” of the control panel. Sometimes the module can “glitch”, randomly turning the compressor on and off, which prevents the desired temperature from being reached.
Repairing the module is possible, but often requires resoldering of elements or flashing. At home, you can try to perform resetting the error (Hard Reset) by unplugging the refrigerator for 15-20 minutes. If after turning on the problem returns, you will need to replace the board or have it professionally repaired.
What you can do yourself: step by step instructions
Before calling a technician, you can perform a number of actions that will help localize the problem or even fix it if it is not critical. The most effective method is complete defrosting. Unplug the refrigerator, open all doors and leave it for at least 24 hours (preferably two days). This is necessary so that the ice in the hidden channels and on the evaporator completely melts.
After defrosting, turn on the refrigerator and let it work for 5-7 hours without loading food. If cold appeared, the problem was in the defrost system (frozen channel or sensor). If after a day of operation in an empty refrigerator the upper chamber is warm, the problem is more serious (leakage, compressor, module).
Also check the tightness of the fit sealing rubber on the freezer door. If it does not fit tightly, warm, moist air enters the chamber, which instantly turns into ice, blocking the system. Wipe the rubber band and check for cracks.
- 🧹 Cleaning the drainage: check the hole for water drainage in the refrigerator compartment, clean it with a brush.
- 🔌 Checking the network: make sure that the voltage is in the outlet is stable (the norm is 220V +/- 10%).
- ❄️ Load control: do not fill the freezer with food to capacity, air must circulate.
How to properly defrost the refrigerator Samsung?
Completely disconnect the device from the power supply. Remove all food and shelves. Leave the doors open for 24 hours. Place rags underneath as there may be a lot of water. Do not use a hair dryer or hot water to speed up the process - this may damage the plastic and evaporator tubes. After defrosting, wipe the chamber dry and turn it on empty.
Why did the cold appear after defrosting, but disappeared again a week later?
This is a classic sign of a malfunction of the defrost system. The ice is growing again and blocking the channels. Most likely, the defrost heating element, defrost sensor or timer has failed. Diagnostics with a multimeter and replacement of the burnt element are required.
Is it possible to operate the refrigerator if the upper chamber does not freeze?
In the short term - yes, the food in the lower chamber will not spoil. However, prolonged operation in this mode is harmful to the compressor, which will work non-stop, trying to gain temperature. This will lead to its overheating and eventual failure.
What is the service life of the compressor in Samsung refrigerators?
The average service life of the compressor is 10-15 years. However, if there are frequent power surges or operation in conditions of poor ventilation (the condenser at the back is clogged with dust), it may fail much earlier.
Is it worth repairing an old Samsung refrigerator?
If the refrigerator is more than 10 years old and requires a compressor replacement or circuit repair (filling with freon), it is often more economically feasible to buy a new model. Repair in such cases can amount to up to 70% of the cost of a new unit.