The situation when Stinol refrigerator stops turning off is familiar to many owners of this equipment. Instead of the usual cycle of work and rest, the compressor hums continuously, trying to achieve the set temperature indicators. This is not just an annoying noise that interferes with sleep, but also a direct signal that the cooling system is working under critical overload.
If you ignore this symptom, the engine resource will be exhausted many times faster, and electricity bills will unpleasantly surprise you at the end of the month. In some cases, equipment can work in this mode for days until the motor winding burns out or another important component fails.
In this article we will analyze in detail the mechanics of the process, explain why refrigerator compartment cannot get cold, and draw up an action algorithm for the owner. You will find out which breakdowns you can fix yourself, and in which cases calling a technician with a pressure gauge manifold will be the only correct solution.
Continuous operation of the unit often indicates a violation of the thermal balance. This means that the cold that the system produces is either not created in the required volume, or instantly evaporates outside. Understanding the physics of the process will help you quickly find the cause.
Principle of operation and influence of the thermostat
The main “brain” that makes the decision to turn the compressor on and off is Thermostat (or thermostat). This small device measures the temperature inside the evaporator or chamber and opens the electrical circuit when a set value is reached. If this unit fails, the contacts may “stick” in the closed position.
In this state motor-compressor receives voltage continuously and does not stop, even if a “coat” of ice has already formed in the chamber. Checking the thermostat is the first thing to do before suspecting more serious refrigerant problems. Often it is enough just to knock on the regulator handle or sharply pull it so that the contacts temporarily open, which will confirm the malfunction.
In Stinol models with electronic control, the role of a thermostat is performed temperature sensor, transmitting signals to the control module. If the sensor “lies” and shows that the chamber is warm, the board will constantly keep the compressor on. Electronics are more sensitive to changes in voltage and humidity than their mechanical counterparts.
⚠️ Attention: When diagnosing a mechanical thermostat, do not try to disassemble its housing. Inside there is a capillary tube with gas or liquid, damage to which will lead to complete loss of functionality of the part. Replace the entire assembly.
Problems with the seal and chamber tightness
One of the most commonplace, but often ignored reasons is a violation of the door seal. Rubber seal over time it dries out, cracks or is simply contaminated with grease and crumbs. Through the resulting cracks, warm air from the room constantly flows inside, and the refrigerator simply does not have time to cool it.
To check the tightness of the fit, you can use a simple sheet of paper. Clamp it with the door around the perimeter: if the paper is pulled out without resistance, it means that the tightness in this place is broken. Also carefully inspect the rubber itself for dents and tears.
If the seal is simply dirty, it can be washed with warm water and soap. In case of deformation, sometimes treating with boiling water or using a hairdryer to give elasticity helps, but this is a temporary measure. Sooner or later sealing rubber you will have to replace it with a new one.
- 🔍 Carefully wipe the magnetic valve and the mating part of the housing from sticky deposits.
- 🚪 Check whether the door is warped due to improper installation or loosening the hinges.
- 🧊 Make sure that the food in the chamber does not interfere with the door closing tightly.
Another important point is the correct loading of the chambers. If you put a pot of hot soup or just defrosted food at room temperature in the refrigerator, the load on the system increases sharply. The compressor will work for wear until it cools the entire volume to the set temperature.
Faults in the defrost system (No Frost)
In Stinol refrigerators with the system No Frost the reason for continuous operation is often a failure in the automatic defrosting system. The evaporator, hidden behind the back wall of the freezer, becomes covered in ice. This ice shell blocks the circulation of cold air, and sensors record an increase in temperature, forcing the motor to work without rest.
Three main elements are responsible for the defrosting process: Defrost heating element, a defrost sensor and a timer (or electronic module). If the heating element burns out, the ice does not melt. If the timer is faulty, it does not give a command to turn on the heating. As a result, the compressor works constantly, trying to break through the ice plug.
☑️ Diagnostics of the No Frost system
A symptom of such a malfunction is often that the freezer is still freezing, but the refrigerator compartment becomes warm. Or you notice that the back wall of the freezer is covered with an uneven layer of ice, although it should be clean.
⚠️ Attention: If you find a thick layer of ice on the evaporator, do not try to pick it out with a knife or sharp objects. You can damage the aluminum evaporator tubes, which will lead to freon leakage and costly repairs.
Refrigerant leakage and capillary system blockage
The most serious technical problem is freon leak. The refrigerant circulates in a closed circuit, and if a microcrack appears in the system (often in sealed areas or due to corrosion), the gas gradually evaporates. The compressor tries to compensate for the lack of cold, working 24/7, but due to the low pressure in the system, the temperature does not drop.
The second option is capillary blockage. A blood clot could have formed in the system from oil oxidation products or frozen moisture, which physically blocks the freon flow. The discharge pressure increases, the engine hums and heats up, but there is no cold.
It is impossible to diagnose these conditions without special equipment. However, there are indirect signs: a hot condenser (grid at the back) only at the beginning or in some places, a quiet hissing or gurgling instead of a smooth hum, lack of cold when the engine is running.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| The engine is hot, there is no cold | Freon leakage | Searching for leaks, vacuuming, refueling |
| The engine hums, but does not start | Stuck or starting relay | Replacing the relay or compressor |
| Frost only at the entrance to the evaporator | Clogged capillary tube | Purge the system or replace the filter |
| Condenser unevenly warm | Lack of refrigerant | Refill or complete restart |
It is important to understand that you will not be able to fix a leak or blockage on your own. It is necessary to call a specialist with equipment for working with refrigerants. Attempts to simply “add gas” without searching for the leak will only give a temporary effect.
Why can’t you ignore the operation of the motor during a leak?
When operating at low pressure (due to a leak), the compressor does not receive proper cooling from freon and oil vapors. This leads to overheating of the windings and rapid failure of the motor. In addition, air and moisture may enter the system, causing corrosion from the inside.
Improper installation and external factors
Sometimes the reason lies not in the breakdown, but in the operating conditions. If Stinol refrigerator is installed too close to the wall, the cooling radiator (condenser) cannot efficiently transfer heat. The air between the back panel and the wall stagnates and heats up, reducing the efficiency of the entire system.
The influence of direct sunlight or the proximity of heating devices (batteries, stoves) is also critical. If the equipment is standing in the sun, the sensors will constantly record high temperatures, and the motor will turn on more often and run longer.
Check the gap between the back wall of the refrigerator and the wall. It should be at least 5-7 centimeters for free air circulation. If the appliances are built into a niche, make sure that there are ventilation holes at the top and bottom.
- ☀️ Do not install the refrigerator opposite a window where direct sunlight falls on it.
- 🔥 Maintain a distance of at least 50 cm from the stove and heating radiators.
- 🌡️ The optimal room temperature for equipment operation is from +16 to +32 degrees.
Another factor is the voltage level in the network. At low voltage electric motor it may not develop the required power, work with overheating and may not turn off on time. In such cases, it is recommended to use a voltage stabilizer.
Diagnostics and troubleshooting methods
If you are faced with a problem of constant operation, act consistently. First, eliminate external factors: check that the door is closed tightly, move the equipment away from the wall, defrost it completely (at least 12-24 hours) without plugging it in. This will help defrost possible ice congestion in the capillaries.
After defrosting, turn on the empty refrigerator. If it reached the temperature and turned off, the problem was in the defrost system or tightness. If it continues to hum, check the thermostat. Disconnect the wires from the thermostat and short them directly (being careful!). If the engine stops, we change the thermostat.
In cases where simple methods do not help, most likely we are talking about a freon leak or a compressor malfunction. This will require professional diagnostics using pressure gauges.
⚠️ Attention: Refrigerator models may have different design features. Technical characteristics and location of components depend on the specific modification of Stinol. Always check the manufacturer's official documentation before disassembling the units.
Frequently asked questions (FAQ)
How long should the Stinol refrigerator work and how long should it rest?
In normal mode, the operating cycle is approximately 15-20 minutes of operation and 20-40 minutes of rest. The working time ratio is usually around 40%. If the refrigerator runs for 40 minutes and costs 10, this is already a cause for concern, especially in the summer.
Can the refrigerator not turn off due to the heat in the room?
Yes, when the room temperature is above +30 degrees, the cooling efficiency drops. The compressor is forced to work longer to compensate for heat gain. However, it should still turn off periodically, although the rest intervals will be minimal.
Is it dangerous to keep the refrigerator on for a long time without a break?
Yes, it is dangerous. Long-term operation without rest cycles leads to overheating of the motor windings, oil degradation and eventual combustion of the compressor. The risk of wiring fire or melting of plastic elements also increases.
Why did the refrigerator work normally after defrosting, but after a week it stopped turning off again?
This is a classic sign of a malfunction of the defrost system (No Frost). Temporary defrosting removed the ice plug, but did not eliminate the cause (the heating element or timer burned out). Ice formed again and blocked the system.