The situation when Stinol refrigerator does not turn off is familiar to many owners of this equipment. The compressor hums for hours, creating a feeling of endless operation, which inevitably leads to increased energy consumption. Owners notice that the unit has stopped making the usual pauses necessary to rest the engine and stabilize the temperature.
Continuous operation of the motor is a signal that the control system does not receive confirmation that the specified parameters have been achieved. In models Stinol 101, 102, 104, 107 and other series, this can be caused either by a banal violation of operating rules or by a serious breakdown compressor or a refrigerant leak. Ignoring the problem can lead to complete failure of an expensive compressor.
In this material we will analyze in detail why Stinol refrigerator does not turn off, and consider the diagnostic algorithm. You will learn how to distinguish a software failure from a mechanical failure, and which components require replacement first.
Primary diagnosis and external factors
Before grabbing the tools, you need to exclude external factors. Often the reason lies in incorrect installation or heat transfer problems. If the unit is too close to the wall, the radiator on the rear panel does not have time to cool down, and compressor is forced to work in increased mode.
Pay attention to the location of the equipment. Do not install the refrigerator near heat sources such as radiators or gas stoves. It is also critical to have a gap between the back of the cabinet and the wall of the room. The minimum distance should be at least 5-7 centimeters for free air circulation.
Check the tightness of the door. If sealing rubber is worn out or dirty, warm air constantly penetrates inside the chamber. Sensors detect an increase in temperature and prevent the system from going into standby mode. Simply washing the rubber or adjusting the hinges can solve the problem.
- 🔍 Check whether furniture is blocking access to the rear radiator grille.
- 🌡️ Make sure the room is not too hot, especially in summer.
- 🚪 Inspect the door for distortions and tight closure.
Malfunctions of the thermostat (thermostat)
One of the most common reasons why Stinol refrigerator does not turn off is the failure of the thermostat. This unit is responsible for monitoring the temperature inside the chamber and sending a signal to turn the compressor on or off. If the contacts inside the thermostat are “stuck” in the closed state, the motor will operate continuously.
In models with mechanical control, such as Stinol 101, 102, 103, the thermostat is a device with a capillary tube. If the tube is damaged or freon leaks from the bellows, the sensor stops responding to cold. Electronic models use temperature sensors, which can also give incorrect readings. To diagnose a mechanical thermostat, you can temporarily close its contacts. If after this procedure the compressor stops starting spontaneously, then the problem is in the regulator. However, this method requires caution and knowledge of the electrical circuit. temperature sensors, which can also give incorrect readings.
To diagnose a mechanical thermostat, you can temporarily close its contacts. If after this procedure the compressor stops starting spontaneously, then the problem is in the regulator. However, this method requires caution and knowledge of the electrical circuit.
⚠️ Attention: Before any diagnostics of electrical components, be sure to unplug the refrigerator. Working with 220V voltage without the appropriate skills is life-threatening.
Replacing a thermostat is a simple procedure, but requires precision. The new element must have identical characteristics to the original one. Installing an unsuitable analogue can lead to incorrect temperature conditions or frequent on-off cycles.
How to check a thermostat with a multimeter?
To check, remove the thermostat and immerse its sensitive part in cold water with ice. Test the contacts with a multimeter: when cooling, the circuit should open. If there is no break, the part is faulty.
Problems with sensors and control module
In modern models Stinol with a system No Frost and electronic control, the control module is responsible for the temperature regime. It receives signals from several sensors located in different areas of the refrigerator and freezer compartments. If one of the sensors is “lying,” the module continues to drive the compressor.
The evaporator defrost sensor often fails. If it shows that there is still a lot of ice on the evaporator, the system will not start the defrost cycle and will try to freeze the chamber without stopping. This is a typical problem for two-compressor models.
Item control module can also be the culprit. Power surges in the network often lead to burning of board elements or firmware glitches. In such cases, the equipment behaves unpredictably: it may not turn on or, on the contrary, not turn off.
- ❄️ The defrost sensor often fails due to corrosion of the contacts.
- 🔌 Voltage surges can damage the electronic control board.
- 🧊 Freezing of the sensor with ice distorts its readings.
Freon leakage and problems with the compressor
If Stinol refrigerator it hums, but does not cool or cools very weakly, while working without interruption, there is a high probability of a refrigerant leak. Freon circulates in a closed circuit, and if its quantity drops below a critical level, the system cannot reach the set temperature.
The compressor tries to compensate for the lack of refrigerant, working for wear. In this case the motor-compressor can become very hot. Long-term operation in this mode leads to thermal overheating of the windings and eventual combustion of the engine.
Another reason is the loss of performance of the compressor itself. Over time, the valves inside the motor wear out, and it ceases to create the necessary pressure in the system. Technically, it works, but does not perform its cooling function.
Diagnostics of a leak requires special equipment. The technician uses a leak detector or the method of washing connections. It is almost impossible to independently find a microcrack in a foamed circuit.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| Compressor is hot, cold is weak | Freon leak | Call a technician to find the leak and refill |
| The engine hums, but does not start | Malfunction of the starting relay | Replacing the start-protective relay |
| The refrigerator does not turn off at all | The thermostat is faulty | Replacing the thermostat |
| Extreme noise and vibration | Wear of the compressor | Replacing the compressor |
Defrosting system in No Frost refrigerators
For models Stinol with the system No Frost the proper operation of the defrosting system is critically important. If the evaporator heating element is burned out, and the timer or defrost sensor is faulty, a “coat” of ice grows on the evaporator.
Ice blocks the circulation of cold air. Sensors in the chamber detect the heat and instruct the compressor to work longer. As a result, the motor hums for days, trying to break through the ice plug, which is becoming more and more numerous.
Visually this can manifest itself in the form of ice on the back wall of the refrigerator compartment or in the freezer. Sometimes ice completely blocks the air ducts. In such cases, complete defrosting of the unit is required for 24 hours and subsequent replacement of faulty elements of the defrosting system.
☑️ Diagnostics of the No Frost system
⚠️ Attention: Do not try to chip the ice with a knife or other sharp objects. Damage to the evaporator tubes will lead to an immediate leak of freon and expensive repairs.
The influence of the "Super Freeze" mode and other functions
Sometimes the reason for continuous operation is trivial - an accidentally activated intensive freezing mode. On the control panel Stinol there is a button or switch "Super Freeze" (Super Freeze). In this mode, the refrigerator is forced to operate without shutting down in order to quickly freeze food.
In older models, this mode may not have an automatic shutdown timer. If you turned it on a week ago, the compressor will continue to work until you manually return the equipment to normal mode. Check the position of all switches on the case.
It is also worth considering seasonality. In summer, when the room temperature exceeds +25...+30°C, it is more difficult for the refrigerator to gain cold. The compressor operating time increases naturally, but complete shutdown cycles should still be present.
- 🔘 Check that the fast freeze mode indicator is not on.
- 🌡️ Measure the temperature in the room - heat increases the load.
- 📦 Do not load a lot of warm food into the chamber at once products.
How long should the compressor operate normally?
Under normal conditions, the refrigerator operates about 30-40% of the time. That is, he works for 10-15 minutes, rests for 20-25 minutes. In summer, the operating cycle can increase to 50-60%.
Frequently asked questions (FAQ)
Why does the Stinol 102 refrigerator hum and does not turn off after defrosting?
If the problem persists after defrosting, most likely the problem is not in the ice. Perhaps during defrosting you damaged the wiring of the sensors or the problem was deeper (freon leak, thermostat malfunction), and defrosting only temporarily improved heat transfer, but did not eliminate the cause.
Is it possible to operate the refrigerator if it does not turn off?
For a short time - yes, but this is an emergency mode. Long-term operation without stopping will cause the compressor to overheat and burn out. If you notice such a malfunction, try to minimize door openings and call a technician.
How often should the Stinol refrigerator turn off?
Depending on the load and room temperature, the operating cycle is usually: 10-20 minutes of work and 20-40 minutes of rest. If the refrigerator does not rest for more than 2-3 hours in a row, this is a cause for concern.
Replacing a thermostat with your own hands - is it difficult?
For mechanical models, this is a task of medium complexity, requiring a screwdriver and a multimeter. For electronic models with a control module, it is better to contact a specialist, as accurate diagnostics are required.