The situation when the freezer freezes food properly, and in the main compartment of the refrigerator Stinol there is room temperature, is a classic sign of a malfunction of the refrigerant circulation system. Owners are often scared, believing that the entire unit has broken down, but in most cases the problem lies in a malfunction of one of the units responsible for distributing cold or generating low temperatures in the refrigeration chamber circuit. This is especially common for users of dual-compressor models or systems No Frostwhere the air circulation paths are separated.
The first thing to do when such an anomaly is detected is to carry out initial visual diagnostics and check the simplest settings. Do not rush to call a technician until you are sure that the temperature controls are installed correctly and the door fits snugly to the body. Sometimes simple freezing of the evaporator due to the door not being tightly closed leads to the fact that cold air simply cannot enter the main compartment, remaining blocked in the freezer area.
In this article we will examine in detail the technical reasons why compressor can work by creating cold in one part of the unit, but not cope with another. We will look at thermostat breakdowns, problems with dampers, freon leaks and electronic control faults typical for refrigerators of the brand Stinol. Understanding these processes will help you make the right repair decision.
Problems with the thermostat and temperature sensors
One of the most common causes of temperature imbalance is the failure of the thermostat (thermostat). In two-compressor models Stinol each chamber is responsible for its own independent cooling circuit and its own control sensor. If the refrigerator compartment thermostat is “stuck” in the open state or transmits incorrect data to the control module, the compressor simply will not turn on to cool this compartment, although the freezer will operate normally.
In modern models with electronic control, the role of a mechanical thermostat is performed temperature sensors (thermistors). Their resistance changes depending on the heat, and if one of them shows an error or “lies,” the electronics can block the supply of cold to the main compartment, believing that the temperature there is already quite low. Often such a breakdown is accompanied by blinking indicators on the control panel or the appearance of an error code.
Diagnostics of the thermostat in mechanical models requires testing with a multimeter. When the sensor is cooled (for example, in a freezer or simply in the air using a spray), the contacts should close with a characteristic click. If there is no click and the resistance does not change, the element must be replaced.
⚠️ Attention: Before replacing the thermostat or sensors, be sure to disconnect the refrigerator from the power supply. Working with live electrical components is deadly and can lead to a short circuit of the control board.
It is also worth considering that in some modifications Stinol the thermostat is only responsible for turning on the compressor, and the distribution of cold is regulated by other mechanical components. Therefore, replacing the sensor does not always guarantee a solution to the problem if at the same time there is a freon leak or a clogged capillary.
Malfunctions of the No Frost system and dampers
If your refrigerator Stinol is equipped with a system No Frostthen the cold in the fridge compartment is not supplied directly from the evaporator, but is forced fan through special channels. The air flow is regulated by an air damper (damper). It is this part that most often becomes the culprit of the situation when there is “polar cold” in the freezer, and there is heat above.
The damper may jam in the closed position due to ice, mechanical damage to the drive, or a failure in the electronic module. In mechanical versions, the damper is controlled by a thermostat connected to the chamber and a cable drive. If the cable has come off or the mechanism is rusty, the flap will not open, and cold air will remain in the freezer compartment.
- 🌬️ Freezing of the damper: Condensation falls on the mechanism and turns into ice, tightly blocking the flap.
- 🔌 Wiring break: To the heating element of the damper or the motor may no current flowing.
- ⚙️ Mechanical wear: The drive gears may wear out, and the motor will hum, but not move the damper.
To check, you need to remove the plastic panel in the upper part of the refrigerator compartment (usually back wall). Visually inspect the condition of the damper: if it is covered with frost or ice, the refrigerator will need to be completely defrosted within 10-12 hours. If there is no ice, but the damper does not respond to changes in temperature settings, the motor or control board has probably failed.
Refrigerant leakage and capillary blockage tubes
More complex technical problems are associated with impaired circulation freon in the system. In single-compressor models Stinol, where one motor pumps refrigerant sequentially through the freezer and refrigeration chambers, a leak or blockage is manifested by exactly the symptom described: in the place where the refrigerant enters the system (freezer), there is still cold, but it simply does not reach the second evaporator (refrigerator compartment) or does not have time to boil.
When freon leaks, the pressure in the circuit drops. The compressor works almost non-stop, trying to gain temperature, but the cooling capacity drops. First, the area farthest from the compressor stops cooling - usually the refrigeration compartment. Over time, if the leak is not eliminated and the system is not refilled, the freezer will also stop freezing.
Clogged capillary tube (often called a “clogged capillary”) occurs due to moisture entering the system or oil oxidation products. This creates a plug that prevents the freon from flowing. The symptoms are similar to a leak: the compressor is hot, the condenser (grid at the back) is only partially warm or cold, and there is no cold in the chambers.
| Symptom | Freon leak | Clogged capillary tube |
|---|---|---|
| Operation compressor | Works without stopping | Works without stopping, may overheat |
| Condenser temperature | Cold or lukewarm | Hot to the point of blockage, then cold |
| Sound | Normal hum | Gurgling or hissing may be heard |
| Solution | Looking for leaks, soldering, refilling | Purge the system, replace the filter-drier, refuel |
It is impossible to independently eliminate these faults without special equipment (vacuum pump, pressure gauge station, burner). A specialist call is required to carry out pressure diagnostics and tightness of the circuit.
Failures in the electronic control module
Refrigerators Stinol, especially those released in the middle 2000s and newer, often equipped with electronic control boards. These devices coordinate the operation of compressors, fans, defrosting heating elements and dampers. If the relay on the board that controls the solenoid of the refrigeration chamber damper burns out, or the triac fails, the command to open the cold supply is simply not received.
Visually, traces of burning, swelling of capacitors, or oxidation of contacts may be visible on the board. However, often there are no external signs, and the fault lies in the “brains” of the device. In this case, the freezer works because its circuit is controlled by another channel, and the refrigerator compartment remains “warm.”
Sometimes the problem is solved by rebooting the system. To do this, you need to:
- Disconnect the refrigerator from the network.
- Wait at least 15-20 minutes.
- Turn it on again and monitor the operation cycle.
Why does a reboot help?
A software failure or a “stuck” logical state could have occurred in the electronic module. Turning off the power resets the controller's RAM, returning settings to factory defaults. If the problem is in the hardware (a burnt part), a reboot will help only temporarily or will not help at all.
If after a reboot the situation repeats after a few hours or days, a hardware failure is likely. On models with a display, temperature alarm indicators may light up or symbols may flash to indicate a specific component. Repairing a board requires soldering skills and knowledge of circuit design, or its complete replacement with a new or restored one.
The influence of the super-freeze and configuration mode
Do not discount the human factor. On refrigerator control panels Stinol there is often a “Super Freeze” function. When this mode is activated, the compressor runs continuously to quickly freeze large quantities of food in the freezer compartment. In some operating algorithms, priority is given to the freezer, and cooling of the main compartment is temporarily suspended or minimized.
If you accidentally turned on this mode (for example, children pressed the buttons or with wet hands), the refrigerator may not leave it for a long time. Usually the super freeze mode is turned off automatically after a certain time (for example, 24-48 hours) or manually. Check the indication on the front panel: if the corresponding icon is lit (often a snowflake or the letter F), the function needs to be deactivated.
Also check the temperature settings. Some electronic models allow you to independently adjust the temperature in each chamber. If the maximum temperature is set in the settings of the refrigerator compartment (for example, +8...+10°C), the products may not seem cold enough, although the refrigerator is technically in good order.
☑️ Primary diagnostics before calling a technician
When a professional is needed repair
Understanding when to stop experimenting and call a professional will save you money and products. If after complete defrosting (12-24 hours) and checking the electrical circuits the problem returns within 24 hours, then the problem is a hidden leak or a complex blockage.
Particular attention should be paid to the condition of the compressor. If it works “pull”, makes a loud noise, heats up to the point where it is impossible to touch it, or constantly clicks the thermal relay (turns on for a couple of seconds and turns off) - these are signs of a critical malfunction. Operation in this mode will finish off the engine in a matter of days.
In addition, if you smell a specific burning smell or see sparking in the compressor area or on the rear wall, operation must be stopped immediately. This may result in a fire.
⚠️ Warning: Do not attempt to solder pipes or open the cooling circuit yourself without a license and equipment. Freon released into the atmosphere is harmful to the environment, and improper soldering can lead to an explosion of the refrigerant-air mixture during subsequent startup.
Prevention and care of the cooling system
To determine the service life of your Stinol and avoid situations with uneven cooling, it is important to follow the rules operation. Check the door seals regularly: if the rubber is dry or dirty, warm, moist air enters the chamber, causing increased ice formation on the evaporator and clogging of the air channels.
Do not place hot foods in the refrigerator. This creates a sharp jump in humidity and temperature, forcing the system to work at its limit, which accelerates compressor wear and contributes to the formation of ice jams in the system No Frost.
Once a year, it is recommended to carry out preventive defrosting (even for No Frost systems), turning off the device for a day. This will allow all the hidden moisture inside the case to evaporate, which over time can turn into an ice coat that interferes with the operation of the dampers and fans.
Why after defrosting Does the refrigerator take a long time to get cold?
After a long defrosting (more than 12 hours), the system needs time to stabilize. The oil in the compressor may have drained into the circuit, and the refrigerant needs time to distribute evenly. Typically it takes from 2 to 6 hours to get into working mode. If during this time the temperature does not begin to drop, the sensor may have been damaged during defrosting or an ice jam has formed.
Is it possible to operate the refrigerator if one chamber is not cooling?
Short-term - yes, but food in a warm chamber will quickly spoil. Long-term operation in this mode is dangerous for the compressor, as it works without interruption, trying to achieve non-existent cold. This leads to overheating of the windings and eventual combustion of the motor.
What freon is used in Stinol refrigerators?
Most models use R600a (isobutane) or R134a refrigerants. R600a is explosive, so working with it requires special qualifications and compliance with safety precautions. The exact type is indicated on the technical information sticker located inside the chamber or on the back wall.
Is it worth replacing the compressor if it hums, but it cools?
If the compressor is just noisy, but copes with cooling and does not overheat, replacing it may not be economically feasible. However, if the noise is accompanied by vibration and an increase in electricity consumption, it is better to replace the unit, as this is a harbinger of imminent failure.