The situation when freezer compartment freezes properly products, and the main compartment of the Samsung refrigerator is at room temperature, is one of the most common and worrisome for owners. The user is faced with a paradox: the compressor is humming, there is an ice crust inside the freezer, but the milk in the upper section turns sour, and the vegetables lose their elasticity. This behavior of the equipment indicates a violation of the circulation of the refrigerant or malfunctions in the temperature control system.
In modern models Samsung with the system No Frost cold is generated in the freezer compartment, and then forcibly supplied to the refrigerator compartment through special air channels. If this process is disrupted, the cold simply does not reach the upper compartment, remaining “locked” below. Understanding the principle of operation of a dual-circuit system helps to quickly diagnose the problem and avoid damage to products.
You should not ignore the first signs of uneven cooling, since prolonged operation in this mode can lead to overload compressor and its expensive replacement. In some cases, a simple defrost or replacement of an accessible part is sufficient to return the unit to full functionality. Next, we will analyze in detail the main causes of the malfunction and how to eliminate them.
Problems with the No Frost system and freezing of the evaporator
The most common reason that Samsung freezer freezes, but the refrigerator does not, is the banal freezing of the evaporator, hidden behind the back wall of the freezer. In systems No Frost the fan drives cold air through the channels, but if the defrosting system fails, a coat of ice builds up on the evaporator. This ice blocks the channels, and the cold flow physically cannot penetrate into the upper compartment.
Owners often do not notice the problem until the ice blocks air ducts completely. At this point, the fan may begin to hum or crackle as it tries to force air through the ice plug. If you hear extraneous sounds from the back wall of the freezer, but there is no cold at the top, this is a sure sign that the air exhaust system is blocked.
⚠️ Attention: If you find that the back wall of the freezer is covered with a thick layer of ice or frost, do not try to pick it out with a knife or sharp objects. Damage to the evaporator tubes will lead to a freon leak and difficult repairs.
To fix this problem, it is often necessary to completely defrost the refrigerator within 12-24 hours. However, if after switching on the problem returns after a few days or weeks, it means that it itself has failed defrost system. This may be a malfunction of the heating element, defrost sensor or timer, which require professional diagnostics and replacement.
Malfunctions of the air circulation fan
The key element that ensures the movement of cold from the lower chamber to the upper one is fan. In Samsung refrigerators it is usually located in the freezer compartment and only works when the door is closed. If this unit stops rotating, cold air remains in the freezer, creating excess cooling there, while the refrigerator compartment becomes warm.
The reason for the fan stopping can be not only an electrical breakdown of the motor, but also a mechanical blockage by an ice crust. Also, bushing bearings often fail, which is accompanied by a characteristic buzzing or squeaking noise. You can check the operation of the fan by opening the freezer door and pressing the door open sensor (or simply quickly closing it and listening).
If fan blades they do not spin when the door is closed, but the compressor is running, you need to dismantle the back panel of the freezer for a visual inspection. In some Samsung models, access to the fan requires partial disassembly of the internal space, which requires accuracy and the presence of tools.
Replacing a fan is not the most difficult procedure, but requiring the correct selection of spare parts. Original Samsung motors are reliable, but analogues can also last a long time if installed well. It is also important to check the fan power circuit, since the problem may lie in oxidized contacts or a broken wire.
Clogged capillary pipeline or freon leak
A more serious technical problem is a violation of the refrigerant circulation. If freezer works and the refrigerator is warm, this may indicate a partial blockage capillary tube. In this case, freon circulates only in a small circle (freezer), without reaching the evaporator of the refrigerator compartment. This is often accompanied by unusually quiet operation of the compressor or its intermittent starts.
Refrigerant leakage can also manifest itself in this way, especially in dual-compressor models or systems with separate circuits. However, in most modern single-compressor Samsungs, when freon leaks, the freezer also stops freezing, although in the initial stage of the leak, cold can only remain in the evaporator area.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Ice on the back wall of the freezer | Defrost system failure | Medium |
| Fan does not make noise | Fan motor malfunction | Low |
| The compressor is hot, but only one side is cold | Capillary clogged | High |
| The refrigerator is silent or runs jerkily | Leakage freon | High |
Diagnostics of blockages and leaks requires special equipment: pressure gauges, leak detectors and a vacuum pump. It is almost impossible to eliminate it yourself capillary blockage without experience and tools. In such cases, calling a technician is the most rational solution, since incorrect refilling of freon can permanently damage the compressor.
Why can't you ignore a freon leak?
Operating a compressor without a sufficient amount of refrigerant leads to its overheating. The motor tries to compensate for the lack of cold by working without stopping, which ultimately causes thermal destruction of the windings and jamming of the piston group.
Failures in the operation of the control module and sensors
Modern Samsung refrigerators are equipped with complex electronics that control all processes. If control module receives incorrect data from temperature sensors, it may not command the air damper to open or the refrigerator fan to turn on. As a result, the freezer operates in normal mode, and the upper compartment is ignored by the system.
Often the culprit is temperature sensor the refrigerator compartment (defrost sensor or air sensor). If it “lies” and shows that it is already cold enough at the top, the control board will not start the cooling cycle. The contacts on the board may also oxidize, especially if there have been water leaks in the refrigerator before.
To diagnose electronic faults, many Samsung models have a self-diagnosis function. A combination of buttons on the control panel (often a long press on the buttons) can display error codes that will indicate a specific faulty unit. Freezer And Fridge or Ice Type) can display error codes that will indicate a specific faulty unit.
⚠️ Attention: Resetting errors by turning off running the refrigerator from the mains for a short time may temporarily relieve the symptom, but will not solve the problem. If the sensor is physically faulty, the error will return after the next operating cycle.
Electronic repair requires soldering skills and knowledge of circuit design. In some cases, it is easier and cheaper to replace the entire control module or a failed sensor than to try to restore burnt elements on the board. It is important to use original spare parts or high-quality analogues with identical characteristics.
Mechanical damage to the air duct damper
The design of Samsung refrigerators includes a special air damper (damper), which regulates the volume of cold air flowing from the freezer into the refrigerator compartment. It works like a valve: it opens when you need to cool the upper chamber, and closes so as not to overfreeze the food. If the damper mechanism is stuck in the closed position, the cold simply does not get to the top.
The damper can get stuck due to the ingress of foreign objects, pieces of ice, or due to a breakdown of the drive motor. This can be checked visually by removing the plastic trim at the top of the rear wall of the refrigerator compartment (where the air holes come out). If the damper does not respond to temperature changes, it must be replaced.
☑️ Diagnostics of the air damper
Interestingly, in some models the damper is controlled mechanically, without a motor, and its position depends on the air pressure. In such cases, the cause of jamming is often the ice plug in the channel, which again brings us back to the need to check the defrost system and the tightness of the seals.
Operating rules and fault prevention
To avoid a situation where the freezer freezesbut the refrigerator does not exist, it is important to follow the operating rules. Frequently opening doors, placing hot food inside, or storing unpackaged food (which releases moisture) will lead to increased frost formation. This accelerates the wear of the system No Frost and clogs the air ducts.
Regular checking of the rubber seals on the doors is another important point. If the rubber does not fit tightly, warm, moist air constantly enters the chamber, which instantly turns into ice on the evaporator. Wipe the elastic with a soft cloth and check its elasticity; replace if necessary.
It is also not recommended to completely fill the refrigerator with food so that it blocks the ventilation holes inside the chambers. Air circulation must be free for uniform temperature distribution. Following these simple rules will extend the life of the compressor and defrost system.
Why, after defrosting, did the refrigerator stop freezing again after a week?
This is a classic sign of a defrost system malfunction. Most likely, the evaporator heating element has burned out, or the defrost sensor or relay has failed. The ice builds up again, blocking the channels, and the cycle repeats. The defective part needs to be replaced.
Is it possible to temporarily use the refrigerator if the upper chamber does not freeze?
You can use it, but it is not recommended to store perishable foods in the upper chamber. However, prolonged operation in this mode is harmful to the compressor, since it may work non-stop, trying to reach the set temperature. It is better to eliminate the cause.
How to understand that the compressor has burned out and not just a leak?
If the compressor hums but does not start (a clicking and humming noise is heard), or it is hot, but no cold is generated anywhere, it may be jammed. When there is a freon leak, the compressor often runs quietly and hardly heats up, but there is no cold. An accurate diagnosis will be made by a technician with a pressure gauge.
How much does the repair cost if the problem is in the No Frost system?
The cost depends on the region and the specific part. Replacing a heating element or sensor is usually cheaper than repairing a compressor or replacing an evaporator. On average, repair of the defrost system is about 30-40% of the cost of a new budget refrigerator.