The situation when Samsung refrigerator works properly in the lower compartment, but stops cooling food in the upper chamber, is one of the most common complaints from owners of equipment with the system No Frost. Users often notice that the ice in the freezer is hard, and the temperature on the shelves in the refrigerator compartment rises to room temperature, causing food to spoil. This behavior of the equipment does not always mean a fatal breakdown of the compressor; most often the problem lies in a violation of the circulation of cold air or malfunctions in the defrost system.
Modern two-chamber models Samsung are designed so that the main cold is generated in the freezer chamber, and then forced into the refrigeration compartment through special air ducts. If this process is disrupted, the upper part of the unit ceases to receive the necessary cold. Malfunction can be caused either by the banal blocking of the damper with food or by the failure of electronic components. Understanding the principle of operation of the system No Frost will help you quickly localize the problem and make a decision: call a technician or try to fix the problem yourself.
It is important not to ignore the first signs of deterioration in cooling, since prolonged operation of the compressor in an attempt to “catch up” the temperature can lead to its overheating and costly repairs. In this article, we will analyze in detail the mechanical and electrical reasons why Samsung refrigerator it does not freeze in the upper chamber, and we will provide a step-by-step algorithm for diagnostics.
The principle of operation of the cooling system and air circulation
To understand, why The upper chamber does not freezeit is necessary to clearly understand the physical scheme of the movement of cold in units Samsung with technology No Frost. Unlike older models with a “crying” wall, here the evaporator is hidden behind the rear panel in the freezer compartment. The fan (fan motor) drives cold air through the air ducts up into the refrigeration compartment, after which the air returns back for re-cooling. If at some stage this chain is broken, the upper chamber remains warm.
The key element here is damper (damper), which regulates the volume of cold air supplied. It opens according to a signal from the thermostat when the temperature in the upper compartment rises above the set value. If the damper is stuck in the closed position or the motor that drives it burns out, the cold simply does not enter the refrigerator compartment, remaining in the freezer. This is why the freezer can work perfectly, creating the illusion that the entire unit is in good working order.
Another critical component is the defrosting system. During operation, frost inevitably forms on the evaporator, which must be periodically melted by heating elements. If defrost cycle is broken, the ice coat grows and blocks the air duct channels. As a result, the fan continues to hum, but the air physically cannot pass through the ice plug to the upper chamber. This is the classic reason why Samsung it freezes poorly at the top when the compressor is working properly.
⚠️ Attention: An attempt to forcefully open the damper manually without diagnosing the electronics can lead to damage to the plastic gears of the mechanism or a short circuit in the control circuit.
Mechanical obstacles and problems with defrosting
The simplest and most common reason for the lack of cold in the upper compartment is banal defrosting. If the system No Frost failed and the evaporator is covered with ice, no adjustments will help until the ice has completely melted. Users often try to “speed up” the process by chipping the ice with a knife, which is strictly forbidden to do - you can puncture the aluminum evaporator, and then repairs will become economically unfeasible.
The correct procedure for complete defrosting takes time. It is necessary to turn off the refrigerator from the network, open the doors and leave the unit for at least 24 hours (preferably two days). During this time, the ice in the hidden channels and behind the rear wall will have time to melt and flow into the drain pan. Often after such a procedure Samsung refrigerator it begins to freeze like new, as the normal patency of the air channels is restored.
In addition to ice, foreign objects can also interfere with circulation. Check that food packaging is not tightly pressed against the outlet openings on the rear wall of the refrigerator compartment. It is also worth inspecting the sealing rubber bands: if they are worn out or dirty, warm air enters the chamber, and the cooling system cannot cope with cooling it, even working in intensive mode.
If after a long defrost the problem returns after a few days or weeks, it means that one of the elements of the defrost system is faulty: the heating element, the evaporator temperature sensor or the fuse. In this case, the ice will build up again, blocking the access of cold to the top.
Fan and damper malfunctions
If defrosting does not help, attention should be switched to mechanical air supply units. Fan in the freezer - this is the “heart” of the circulation system. When working, it makes a characteristic but quiet noise. If you hear a hum, grinding noise, or, conversely, complete silence while the compressor is running, the fan bearing may be stuck or its winding has burned out. Without a working fan, cold air remains in the freezer area and does not rise upward.
The second common reason is breakdown dampers (Air Damper). This is a device with a motor that opens and closes for air. In Samsung models, the dampers often fail due to the breakage of plastic gears inside the motor gearbox. This can be checked visually by removing the plastic air duct cover at the top of the refrigerator compartment (usually it is located under the ceiling of the compartment). If the damper is closed and does not respond to changes in temperature, it must be replaced.
Diagnostics of the damper requires caution. When removing the duct cover, make sure you do not damage the fragile plastic latches, which become very brittle in the cold. It is also worth checking whether the movement of the damper is not hindered by frozen ice or condensation that could have frozen in the mechanism.
⚠️ Attention: Before removing any panels and checking electrical components, be sure to disconnect the refrigerator from the power supply to avoid electric shock.
How to check the fan without disassembling it?
Put your ear to the back wall of the freezer while the compressor is running. If you hear the sound of the engine running, but there is no cold, the problem is in the channels or damper. If there is silence, the fan motor has probably burned out.
Temperature sensors and electronic control module
Modern Samsung refrigerators are stuffed with electronics. Several sensors (thermistors) are responsible for the temperature regime. If the temperature sensor in the refrigerator compartment “lies” and sends a signal to the control module that “there is enough cold,” the module will not open the damper and will not turn on the fan. As a result, the actual temperature rises, food spoils, and the equipment “thinks” that everything is in order.
The defrost sensor located on the evaporator often fails. It controls the defrosting temperature. If it shows incorrect data, the heating element may not turn on on time, which leads to ice accumulation, or turn on too often, causing temperature changes. Replacing sensors is a simple procedure, but requires testing with a multimeter to confirm the malfunction.
In rare cases, the problem lies in the control module (board) itself. Power surges can damage the relay that controls the fan or damper. If all the mechanical parts and sensors are working properly, but the commands are not executed, the “brains” of the refrigerator are likely to break down. Repairing the board requires a qualified electronics engineer or its complete replacement.
| Component | Fault symptom | Probability of failure |
|---|---|---|
| Fan Motor) | Noise, grinding or lack of sound when the compressor is running | High |
| Damper | The refrigerator is working, but it’s warm upstairs; the damper does not move | Average |
| Temperature sensor | Unstable temperature conditions, errors on the display | Average |
| Defrost heating element | Ice build-up on the evaporator, channel blocking | Low |
For accurate diagnostics of electronics, it is often necessary to enter the service mode of the refrigerator Samsung, where you can read error codes. Combinations of buttons for entering depend on the specific model, but usually it is a long press of certain keys on the control panel.
Freon leak and problems with the compressor
Although a refrigerant leak (freon) most often leads to a complete absence of cold in all chambers, in the initial stage or under certain conditions it can be observed a situation where the freezer still “holds” residual cold, but the temperature in the refrigerator compartment has already increased. This is due to the fact that freezing water in the freezer requires less cooling capacity than maintaining +4°C in a large volume of the upper chamber.
Signs of a leak can be a swollen rear wall inside the refrigerator (if the evaporator is foamed into the housing) or, conversely, the lack of heating of the condenser grilles on the sides of the housing when running compressor. If the compressor works constantly, without turning off, trying to gain temperature, but there is no cold, this is an alarming signal.
Problems with itself compressor, such as a drop in valve performance or inter-turn short circuit of the windings, can also give a similar effect. However, diagnosing a compressor and finding freon leaks are complex technical tasks that require special equipment (pressure gauges, leak detectors, vacuum pump). It is almost impossible to eliminate the leak and refill the system on your own.
If a leak is confirmed or the compressor breaks down, a call will be required certified master. Repair in this case will include finding the leak, soldering, evacuating the system and charging with new refrigerant.
Step-by-step instructions for self-diagnosis
Before calling a technician, it is recommended to carry out basic diagnostics, which will help eliminate simple causes and save time. Follow the algorithm to understand why Samsung refrigerator the upper chamber does not freeze. Remember that safety comes first: carry out all manipulations with electrical components only with the power turned off.
First, perform a visual inspection and check the temperature conditions. Make sure that food does not block the air ducts and that the door closes tightly. Then do the defrost test described above. If the problem is not solved, proceed to checking the operation of the fan and damper.
☑️ Primary diagnostic algorithm
Checking the damper and fan often requires partial disassembly Remove the top plastic panel in the refrigerator compartment (usually secured with latches or screws). Turn on the refrigerator and observe whether cold air is supplied when the damper is open. If you are not confident in your abilities at the disassembly stage, it is better to stop and turn to professionals.
⚠️ Attention: Technical characteristics and location of components may vary depending on the specific model Samsung. Always check the official user manual for your device before disassembling.
Frequently asked questions and answers (FAQ)
Why doesn’t the Samsung No Frost refrigerator freeze the top after defrosting?
If after complete defrosting (more than 24 hours) the problem returned after a few days, it means it’s not The defrost system is working. Most likely, the evaporator heating element, defrost sensor or fuse has burned out. Ice builds up again and blocks the air supply channels.
Is it possible to operate the refrigerator if the upper chamber does not freeze?
For a short time - yes, if the food is moved to another place. However, prolonged operation in this mode is harmful to the compressor, which will work non-stop, trying to compensate for the lack of cold. This can lead to its combustion.
How to understand that the fan is faulty and not the damper?
You need to remove the air duct cover in the freezer. If the fan does not spin (or spins with difficulty/noisy) when the door is closed and the compressor is running, there is a problem with it. If the fan blows strongly, but the air does not flow into the upper chamber, check the damper and channels for ice.
How much does it cost to replace the damper in a Samsung refrigerator?
The cost consists of the price of the part itself (damper) and the work of the technician. The price of the part varies depending on the model, but it is usually not the most expensive unit. You can find out the exact price at the service center by naming the model of the refrigerator.
What does the blinking temperature indicator on the Samsung panel mean?
Flashing numbers or indicators often indicate an error in the system. This may be a signal about an increase in temperature in the chamber (which is logical in the event of a breakdown) or a specific malfunction code (for example, a sensor or fan error). The decoding of the code can be found in the instructions or service manual.