The situation when it is warm in the refrigerator compartment, and in the freezer the food turns to stone, is one of the most common complaints of equipment owners Samsung. This is a classic symptom of poor circulation of cold air, which is typical for systems No Frost. The user is often frightened, believing that the compressor has failed or there has been a freon leak, but in most cases the problem lies in the defrost or air flow distribution system.
Unlike old models with a crying evaporator, modern units of the Korean brand use a complex scheme where cold is generated in one place and is forced by a fan into different chambers. If damper is closed or the air is blocked by an ice plug, the upper section stops cooling. It is important to understand that the compressor can operate in normal mode, trying to cool an already cold freezer, ignoring the needs of the upper compartment.
Before calling a technician or disassembling the unit, it is necessary to carry out initial diagnostics in order to eliminate common operating errors. Sometimes it is enough to simply defrost the device or correct the food that is blocking the ventilation holes. However, if simple methods do not help, you will have to delve into the technical causes of the malfunction evaporator or control electronics.
The principle of operation of the No Frost system and air distribution
To understand why Samsung it stopped cooling in upper compartment, you need to understand the physics of the process. In systems No Frost the main heat exchanger (evaporator) is hidden in the rear wall of the freezer. The fan drives cold air through special channels: some goes to freeze, and some goes through the air duct into the refrigerator compartment. The temperature there is regulated by the degree of opening of the air damper.
If the freezer is working normally, it means there is refrigerant in the system and the compressor is working. The problem is localized in the air supply unit or in the evaporator defrost system. Ice accumulating on the evaporator is blocking the fan or blocking the supply ducts. As a result, cold air simply cannot physically reach the upper chamber. Circulation it is broken, and it becomes warm in the upper compartment.
How does the defrost cycle work?
In normal mode, every 8-12 hours the compressor turns off and the heating element turns on defrost, which melts ice on the evaporator. Water flows into the pan. If the heating element burns out or the sensor is stuck, ice builds up and blocks the operation of the system.
It is worth noting that in some models Samsung with two cooling circuits (technology Twin Cooling) the situation may be more complicated. Here, each chamber is responsible for its own evaporator and its own fan. If there is no cold in the refrigerator, but everything is fine in the freezer, this may indicate a malfunction of the top fan or the damper that controls the flow for the refrigerator compartment.
Primary diagnostics: what to check before calling a technician
Do not rush to disassemble the back panel if you have not carried out basic checks. Often the reason lies in little things that can be easily fixed with your own hands. First of all, make sure that the food is not lying close to the back wall and does not block the outlets of the air ducts. In models Samsung with the system Space Max the walls are thin, and the slightest obstacle disrupts the air flow.
The second important point is checking the temperature conditions. Make sure you don't accidentally set the Eco or Holiday mode, which may limit the cooling of the refrigerator compartment to save energy. Also check that the door closes tightly. If the seal is worn out or a foreign object gets on it, warm air will constantly flow inside, and the system will not cope with the removal of moisture, which will lead to freezing.
☑️ Initial check of the refrigerator
If everything is visually in order, listen to the operation of the unit. Is there a characteristic fan noise inside the freezer? If there is silence, although the compressor is humming, the fan motor may have burned out or ice has frozen on its blades. In this case, the cold does not circulate, remaining in the evaporator area.
Defrosting system: heating element, sensors and timer
The most common reason why the refrigerator Samsung does not maintain the temperature in the upper compartment is a failure in the defrosting system. When the evaporator becomes covered with ice, it turns into an ice monolith. The fan cannot blow air through this block. Three key elements are responsible for the defrosting process: defrost heating element, defrost sensor and timer (or electronic control module).
If the heating element is burnt out, the ice does not melt. With each compressor operating cycle, the ice increases until it completely blocks the channels. The defrost sensor (defroster) should monitor the temperature of the evaporator and turn off the heating element when the ice melts. If it “lies” and shows that there is no ice, it will not turn on. In models with electronic control, the role of a timer is performed by control modulewhich can also fail.
Diagnostics of these elements requires a multimeter. It is necessary to “ring” the heating element for an open circuit. The resistance of a working heating element is usually several hundred Ohms. If the device shows infinity, the element must be replaced. The sensor is also checked for resistance, which should change depending on the temperature.
Faults in the air damper and fan
In modern models Samsung with electronic control, a motorized damper is responsible for supplying cold. This is a plastic motorized curtain that opens at the command of the control module when it gets too warm in the upper chamber. If the mechanism is stuck in the closed position or the drive board is burned out, cold air simply does not enter the refrigerator compartment.
The evaporator fan is another critical component. Unlike the heating element, it works constantly while the compressor is running. If its bearings are worn out, it begins to hum or squeak and then stops. Sometimes the fan blades freeze to the duct wall due to excess moisture. In this case, the motor hums, but does not spin, and circulation refrigerant (in the form of air) stops.
| Component | Fault symptom | Method checks |
|---|---|---|
| Defrost heating element | Ice build-up on the evaporator, no cold at the top | Ring with a multimeter (should ring) |
| Fan | Noise or silence when the compressor is running | Visual inspection of rotation, checking power supply |
| Damper | The temperature in the chamber is above normal, the damper is closed | Checking the stroke of the rod, availability of power drive |
| Defrost sensor | No heating element is turned on or its continuous operation | Resistance measurement at different temperatures |
In some models Samsung access to the damper is behind decorative panel at the top of the refrigerator compartment, which simplifies repairs.
Problems with the seal and tightness
It would seem, what does the rubber band on the door have to do with it if the freezer freezes? But it is the leaking door of the refrigerator compartment that is the catalyst for many problems. Warm, moist air constantly enters the chamber through a gap in the seal. System No Frost tries to remove this moisture by condensing it on the evaporator. The volume of ice grows exponentially, faster than calculated by the defrost cycle.
As a result, the evaporator becomes overgrown with a “fur coat”, the fan stops pumping air, and the chamber gets warmer. Checking the seal Samsung easily: clamp a strip of paper between the door and the body in different places. If the paper is pulled out without resistance, the seal does not fit tightly. Also pay attention to the door itself: if it is skewed, the hinges may require adjustment.
⚠️ Attention: If you find that the seal is torn or petrified over time, no folk methods such as heating with phenoz will help for a long time. Replacing sealing rubber is the only correct solution for restoration tightness.
In addition, frequent opening of the door or placing hot products in the chamber also leads to overload of the evaporation system. Moisture does not have time to escape into the drainage and freezes in the air supply channels, creating an ice plug.
Rare but possible causes: freon leak and control module
Although we started with the fact that when the freezer is running, freon is usually in order, there are nuances. In single-compressor systems with one cooling circuit (where the cold goes from the freezer to the refrigerator), the leak may be partial. There is enough refrigerant to keep a small volume of the freezer minus, but there is no longer enough pressure for a large volume of the refrigeration chamber. In this case, capacitor (the grill at the back) will be only partially cold or warm.
The electronic control module is the “brain” of the refrigerator. If the heating element or damper control relay in it burns out, the system stops responding correctly to commands. In models Samsung with a display on the door, this may be indicated by an error code (for example, 22E, 24E - sensor errors). However, the module rarely fails on its own; more often it is a consequence of power surges.
⚠️ Attention: If you notice that the condenser tubes (on the back wall) are cold or covered with frost in only one place, and the rest is warm, this is a sign freon leaks. You can’t fix this on your own; you need to call a technician with equipment to find leaks and refill them.
It is also worth mentioning that the capillary tube is clogged. This rarely happens, but if there is moisture or dirt in the system, an ice plug may form in a narrow area of the tube, blocking the circulation of freon. The symptoms are similar to a leak: the freezer is weak or in deep-freeze mode, and the refrigerator is warm.
Algorithm for troubleshooting
If you decide to act on your own, follow a clear plan. Do not try to pick at the ice with a knife - this is guaranteed to puncture the evaporator and lead to expensive repairs. The best way to deal with ice jam is complete defrosting.
Unplug the refrigerator, open all doors and remove food. Leave the unit to defrost for at least 24 hours (preferably two days). During this time, all the ice in the hidden channels and on the evaporator will have time to melt and evaporate. If after turning on the refrigerator started working normally and kept the temperature for a week, the problem was in the defrosting system (heating element, sensor). If the problem returns after 3-5 days, change the heating element or sensor.
If defrosting did not help and cold did not appear immediately after turning on, or if you hear that the compressor is working, but There is no cold anywhere (or the freezer is barely freezing), most likely it is a leak or a broken compressor. In this case, you cannot do without specialized equipment.
Why is there ice in the freezer, but warm in the refrigerator?
This is a classic sign of an evaporator clogged with ice or a non-working fan. Cold is produced, but cannot enter the upper chamber due to an ice blockage in the air duct. Defrosting and checking the heating element are required.
What error code indicates a problem with defrosting in Samsung?
The most common codes are 22E, 22C (evaporator sensor error), 24E, 24C (electrical heating element or defrost sensor error). The exact value depends on the specific model and year of manufacture.
Is it possible to operate a refrigerator with defrosting not working?
It is highly not recommended. The compressor will work hard trying to gain temperature. Sooner or later, ice will reach the fan, damage its blades or jam the motor, which will lead to more expensive repairs.
How much does it cost to replace a defrost heating element?
The cost consists of the price of the spare part (usually inexpensive) and the work of the technician. Independent replacement is possible if you have access to the evaporator and skills in working with a multimeter and a screwdriver.