Why the Stinol refrigerator does not turn off: troubleshooting

The situation when Stinol refrigerator stops turning off is one of the most alarming problems for the owner of household appliances. The compressor hums non-stop, trying to reach the set temperature, but never reaches it. This not only creates constant background noise that interferes with rest, but also leads to a sharp increase in electricity bills.

Modern models, even time-tested ones such as Stinol, are equipped with a protection system, but in case of certain breakdowns it may not work on time. If the motor operates non-stop, this indicates that the control system “thinks” that the chamber is too warm, or that the cooling capacity has dropped to a critical minimum.

It is important to understand that ignoring the problem can lead to complete failure of an expensive compressor. Overheating of the windings the engine during constant operation without a rest break is the right way to major repairs. In this article, we will analyze in detail why this happens and how to diagnose the malfunction.

Primary diagnostics: external factors and settings

Before grabbing the tools and suspecting a serious breakdown, it is necessary to eliminate trivial operating errors. Often the reason lies not in the hardware, but in environmental conditions or improper handling by the user. The temperature in the room plays a key role.

If you install the unit next to a radiator, stove or in direct sunlight, heat exchange it is violated. The radiator on the rear wall does not have time to cool down, and the sensors record the high temperature, forcing the engine to work without stopping. Check the distance to walls and heating devices.

⚠️ Attention: If the refrigerator is located close to the wall, a gap of less than 5-7 cm may block air circulation. Move the equipment away from the wall at least 10 cm for normal operation of the condenser.

It is also worth checking the thermostat settings. Perhaps one of the household members accidentally turned the knob to the “Maximum” position or turned on the Super Freeze (super freeze) mode. In this mode, the compressor shutdown is programmatically blocked for a certain time (usually up to 24 hours) for quick freezing of food.

Another important aspect is the tightness of the chambers. If the rubber seal on the door is worn out, dirty or deformed, warm air constantly enters the chamber. The motor tries to cool this new volume of air and cannot stop. Carry out a simple test: clamp a sheet of paper between the door and the body; if it falls out easily, the seal needs to be replaced.

Failures of the thermostat and temperature sensors

One ​​of the most common reasons for continuous operation of the Stinol refrigerator is the failure of the thermostat (thermostat). This device is responsible for opening the electrical circuit when the set temperature is reached. If the contacts inside the thermostat are “stuck” in the closed position, the circuit does not break, and the compressor continues to hum.

In models with electronic control (No Frost), a temperature sensor (thermistor) is responsible for this process, which sends signals to the electronic control module. If the thermistor “lies” and shows the module that the chamber is +10°C instead of the real +2°C, the system will keep the compressor on until the bitter end.

Diagnostics of a mechanical thermostat is possible at home. To do this you need:

• 🔌 Disconnect the refrigerator from the network and remove the thermostat.
• ❄️ Place the thermostat sensitive tube in a container with ice for several minutes.
• 📟 Ring the contacts with a multimeter: if the circuit does not open during cooling, the part is faulty.

Replacing the thermostat is a simple procedure, but requires care. It is important to install the bellows tube correctly so that it fits snugly against the evaporator, otherwise the temperature readings will be incorrect. For electronic sensors, replacement is even simpler, but requires disassembling the internal panel.

Refrigerant leakage and problems with the circulation system

If the technical components are working properly, but the cold does not accumulate, there is a high probability freon leaks. The refrigerant circulates in a closed circuit, and if a microcrack appears in the tube, the gas gradually evaporates. The compressor tries to compensate for the lack of refrigerant by constant operation, but the cooling efficiency drops.

Leak symptoms often appear gradually. At first, the refrigerator begins to turn off less frequently, then the rest intervals become shorter, and eventually it goes into non-stop mode. In this case, the freezer may work, but the main compartment will not, or the temperature will be higher than normal in all chambers.

Sometimes the problem lies not in the leak, but in clogging of the capillary tube. Oil breakdown products or moisture entering the system can clog the thin channel through which freon enters the evaporator. The pressure in the system is rising, the compressor is humming, but there is no cold.

To eliminate these problems, you will need to call a technician with specialized equipment (vacuum pump, pressure gauge station). It is impossible to fix a leak or blockage on your own without tools.

Compressor wear and problems with the start relay

The heart of the refrigerator is the compressor. Over time, its resource is depleted. The piston group wears out, the valves lose their tightness, and the engine ceases to create the necessary pressure in the system. He works constantly, trying to “catch up” with pressure, but physically cannot do this.

Often the culprit of continuous work becomes start relay. This device starts the engine and protects it from overloads. If the relay contacts are burnt or the mechanism is stuck, the compressor may not start normally or, conversely, may not turn off at the command of the thermostat.

Signs of problems with the compressor:

• 🔊 Strong vibration and loud metallic knocking when operation.
• 🔥 Excessive heating of the motor housing (impossible to touch with your hand).
• ⚡ Sudden voltage surges when trying to start.

If the compressor fails, replacing it is often not economically feasible for older models Stinol, since the cost of a new unit and work to replace it can be up to 70% of the price of a new refrigerator.

Features of operation in No Frost mode

In refrigerators Stinol with a system No Frost add their own nuances. Here the air is forced to circulate through an evaporator hidden behind the rear wall. If the fan that circulates this air is broken or frozen in an ice crust, the temperature sensors in the chamber will show heat, although it may be very cold in the evaporator itself.

The defrosting system also plays an important role. If the defrost heating element, timer or defrost sensor is faulty, the evaporator becomes overgrown with ice (“coat”). Ice blocks the air channels, cold stops flowing into the chamber, and the compressor works without rest, trying to cool the volume.

⚠️ Attention: An attempt to independently peel off the ice with a knife or boiling water in the No Frost system can lead to a broken evaporator. Defrost the refrigerator only naturally within 24 hours.

Checking the No Frost system requires partial disassembly of the rear panel of the freezer. It is necessary to visually assess the amount of ice on the evaporator. If the snow layer exceeds 3-5 mm, the defrosting system does not function correctly.

When you need to call a technician

Not all faults can be fixed with your own hands. If you have checked the thermostat, made sure the doors are sealed and the settings are correct, but the refrigerator Stinol still does not turn off, there is probably a deeper problem. The intervention of a professional is required if there is a suspicion of a freon leak, a system blockage, or a compressor breakdown.

The technician will conduct diagnostics using instruments and accurately determine the location of the leak or the nature of the blockage. Also, a specialist will be able to replace complex components, such as an electronic control module or the compressor itself, in compliance with soldering and vacuum technology.

Remember that independent repair of complex equipment without skills can lead to final breakdown of the unit. If you are not confident in your abilities, it is better to entrust the repair to professionals, especially when it comes to a sealed refrigerant circuit.