Situation when the refrigerator Samsung begins to freeze food to the point of ice, causing fair concern. Instead of fresh vegetables and chilled meat, you find frozen lumps, spoiled juices and frost on the walls of the chamber. This is not only inconvenient, but also dangerous for the safety of equipment, as it indicates a malfunction of the climate control system.
Most often, the problem lies in a software failure or improper operation, but more serious breakdowns cannot be ruled out, such as a freon leak or thermostat failure. Owners of models with the system No Frost face this less often, but errors in the operation of fans or defrost sensors are also possible here.
In this article we will analyze in detail the main reasons why your unit began to operate in the “deep freeze” mode, and we will offer an algorithm of actions for troubleshooting yourself without calling a technician.
Checking the temperature settings and operating mode
The first thing to do when faced with a problem is to check the current settings. Sometimes users accidentally change the settings by touching the control panel, or children play with the buttons. In models Samsung with electronic control, the temperature can be set to minimum values, which leads to freezing of the contents.
The optimal temperature for the main chamber is considered to be in the range from +3°C to +5°C. If you see a value of +1°C or +2°C on the display, this is already a reason for ice to form on the rear walls and food to freeze at the rear panel. For the freezer, the norm is -18°C, but not lower than -20°C or -24°C in constant mode.
Pay attention to the activated modes. If the indicator Power Cool (enhanced cooling) or Power Freeze (enhanced freezing) is on, the refrigerator will operate at its maximum capacity, ignoring standard compressor stop cycles. These functions are designed to quickly cool large quantities of food, but they cannot be left on constantly.
⚠️ Attention: Prolonged operation in Power Cool mode can lead not only to food spoilage, but also to overload of the compressor, which will shorten the life of the motor.
To reset the settings to factory settings, find the button Reset or hold the temperature selection button for 3 seconds. Some models require simultaneous pressing of the Freezer and Fridge.
The influence of the No Frost system and air flow distribution
Refrigerators Samsung with technology No Frost work on the principle of forced air circulation. Cold air from the evaporator is forced by a fan into the chamber through special channels. If these channels are clogged with food or the air supply damper is stuck in the open position, a stream of cold air will blow directly onto the shelves, causing local freezing.
A common mistake is loading the chambers incorrectly. When food is placed close to the back wall or blocks the ventilation openings, circulation is disrupted. As a result, the temperature sensors read incorrect data, and the compressor does not turn off on time.
- ❄️ Do not place warm dishes in the chamber - this knocks off the sensors and makes the compressor work longer.
- ❄️ Leave a gap of 3-5 cm between the food and the back wall for free air circulation.
- ❄️ Check whether the packages are frozen to the ventilation grilles on the rear wall.
It is also worth checking the condition of the door seals. If the elastic does not fit tightly, warm, moist air enters the chamber. The system No Frost tries to compensate for the increase in temperature by increasing its operation, which leads to the formation of a large amount of frost and subsequent icing of the products.
Malfunctions of the thermostat and temperature sensors
If the settings are set to a minimum, and the products are positioned correctly, the reason may lie in the electronics. In modern models Samsung thermistors (resistance sensors) are responsible for temperature control. Their task is to transmit a signal to the control module that the set temperature has been reached.
When the main chamber sensor fails or shows low values (for example, it “thinks” that the chamber is +10°C, although it is already -5°C), the compressor continues to operate continuously. This is the classic reason why the refrigerator “buzzes” and gets very cold without turning off.
In models with mechanical control, the role of an electronic sensor is played by thermostat. This is a mechanical device with a capillary tube that senses temperature. If the thermostat is “stuck” in the “on” position, the circuit does not open and the freezer runs non-stop.
How to check the sensor?
To check the temperature sensor, you need a multimeter. At room temperature, the resistance of a working thermistor is usually about 2-3 kOhm. As it cools, the resistance should increase. If the readings do not change or are equal to zero/infinity, the sensor is faulty.
Replacing the sensor is a simple procedure, but requires partial disassembly of the internal panel of the refrigerator. It is important to use original spare parts or high-quality analogues with identical characteristics.
Problems with the control module and electronics board
The "brain" of the refrigerator Samsung is the main control module. It is he who processes the signals from all sensors and commands the compressor when to turn on and off. Software failures or power surges in the network can lead to a board glitch.
In this case, the module can ignore sensor readings and keep the compressor turned on constantly. Situations are also possible when the relay on the board burns out, which “sticks” in the closed state, continuously supplying power to the motor.
Diagnostics of the board requires special knowledge and equipment. If you notice that all segments on the display are lit, the indicators are blinking, or, conversely, the screen has gone dark and the refrigerator is freezing, most likely the problem is in the electronics.
⚠️ Attention: Repairing the control module yourself is only possible if you have experience working with a soldering iron and electronic circuits. In most cases, the entire board needs to be replaced.
Sometimes a full system reset (Hard Reset) helps. To do this, you need to unplug the refrigerator for 10-15 minutes. This will allow the capacitors to discharge and the controller memory to be cleared of temporary errors.
☑️ Actions if an electronics failure is suspected
Refrigerant leakage and compressor operation
Paradoxically, a freon leak can also lead to increased frost, but only at one point. If a microcrack has formed in the circuit, the refrigerant begins to leak. The compressor, trying to maintain the temperature, works without interruption.
As a result, a so-called “snowdrift” or ice coat forms at the area where freon leaves the filter-drier or at the beginning of the evaporator. The rest of the chamber may freeze slightly, but there will be strong ice near the source of the leak.
Another option is if the refrigerator has a two-compressor, and one of the circuits has lost its tightness, the second may work in increased mode, trying to compensate for heat inflows, or the control system fails due to temperature differences.
Signs of a leak:
- 🔍 The compressor works almost without stopping.
- 🔍 The condenser (grid at the back) is only partially warm or cold.
- 🔍 A local area of heavy icing has formed in the freezer.
Elimination of the leak requires call a technician, as it is necessary to find the location of the damage, solder it, vacuum the system and fill in new freon.
Comparative table of symptoms and causes
To make it easier for you to navigate the problem, we have compiled a table linking the external manifestations of the malfunction with the probable cause.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Ice on all products, Power Cool indicator is on | Fast freezing mode activated | Low (setting) |
| The refrigerator does not turn off, the food at the back wall is frozen | Faulty temperature sensor or thermostat | Medium (part replacement) |
| Ice snowdrift in one corner, the compressor hums constantly | Freon leakage or clogged capillary system | High (a master is required) |
| Indicators are flashing, chaotic temperature changes | Control module failure | High (board replacement) |
As can be seen from the table, many problems can be diagnosed visually or by the behavior of the indicators. However, an accurate diagnosis often requires an instrumental check.
When it is necessary to call a specialist
Independent repair is justified in cases of setting up modes, replacing the seal or cleaning the drainage system. However, there are situations when the intervention of an unqualified user can lead to final breakdown of the unit.
Calling a specialist is required if you hear extraneous sounds (gurgling, hissing), smell burnt wiring, or see sparking. Also, you should not open the refrigerant circulation system yourself - this is dangerous to health and requires licensed equipment.
If your refrigerator is under warranty, any independent repairs associated with opening the seals will lead to loss of warranty obligations. In such cases, it is better to immediately contact an authorized service center Samsung.
The technician will conduct a full diagnosis, check the pressure in the system, the integrity of the electrical circuits and the operation of the electronics. Professional repairs often turn out to be cheaper than buying a new refrigerator after unsuccessful experiments.
Why does a Samsung refrigerator freeze even if the temperature is set to +5°C?
Most likely, the temperature sensor is faulty, which sends an incorrect signal to the control board that it is warm in the chamber. It is also possible that the air supply damper gets stuck in the open position.
Is it possible to operate the refrigerator if it is very cold?
For a short time - yes, but this will lead to food spoilage and increased load on the compressor. Long-term operation in this mode can cause freezing of the evaporator and failure of the No Frost system.
How to defrost a Samsung refrigerator with a No Frost system?
No Frost systems require automatic defrosting. However, once a year, complete manual defrosting is recommended: unplug the appliance, open the doors and leave for 10-12 hours to completely defrost the hidden evaporator.
What should you do if, after defrosting, the refrigerator starts to get very cold again?
This indicates a hardware malfunction (sensor, thermostat, board). Defrosting in this case was a temporary measure. Diagnosis and replacement of the defective part is required.
Does the location of the refrigerator affect the severity of frost?
Yes. If the refrigerator is too close to the wall or heating devices, heat exchange is disrupted. The compressor overheats and may not work correctly, although more often this leads, on the contrary, to insufficient cooling.