The situation when a refrigerator Stinol works without interruption is familiar to many owners of this equipment. The unit can hum for days on end without turning off for a minute, which inevitably leads to excessive energy consumption and overheating of the main components. If you notice that the motor does not pause, and the temperature inside the chamber is below the set temperature or, conversely, the food begins to deteriorate, you cannot ignore this signal. Constant operation of the compressor is a sure sign that the control system has lost control over the temperature regime.
Most often the problem lies in faulty sensors, a refrigerant leak, or a stuck trigger mechanism. In some cases, the refrigerator simply does not have time to reach the desired temperature due to a leak or improper installation. It is important to understand that continuous operation motor is not the norm, but an emergency mode, which can lead to complete failure of the equipment in a matter of days.
In this article we will analyze in detail all the possible reasons why your Stinol stopped turning off. We will look at both simple everyday errors that you can fix on your own in five minutes, as well as complex technical faults that require the intervention of a specialist. Understanding the nature of the breakdown will help you save time and money by avoiding unnecessary expenses on diagnostics.
Checking the settings and the “Super Freeze” mode
Before you panic and look for tools, you should check the control settings. Often, owners accidentally activate the enhanced freezing mode, forgetting to turn it off. In this mode compressor works to the limit of its capabilities, ignoring the readings of temperature sensors in order to freeze food as quickly as possible. On models Stinol with electronic control, this can be the mode Super Freeze, and on mechanical ones - the thermostat knob is turned to the maximum.
If you turned on this mode to freeze a large volume of meat or berries, but forgot to turn it off, the refrigerator will work forever. The electronics will not allow the motor to rest until you force the settings to return to standard mode. Check the control panel: if the snowflake indicator or the inscription “Max” is on, then the cause has been found.
It is also worth checking whether the temperature settings have gone wrong. Perhaps one of the household members accidentally touched the regulator. For normal storage of food, a temperature of +2...+4°C in the main chamber and -18°C in the freezer is sufficient. Setting lower values makes the system work more intensively.
⚠️ Attention: Long-term operation in the “Super Freeze” mode can lead to freezing of the condensate drain channels and the formation of ice plugs, which will require defrosting the unit within 24 hours.
If you are convinced that the modes are set correctly, but the problem persists, proceed to more complex technical reasons. You should not immediately disassemble the equipment; first try to analyze the operating conditions.
Malfunction of the thermostat or temperature sensor
One of the most common reasons why the refrigerator Stinol does not turn off is the failure of the thermostat (thermostat) or air sensor. It is this element that is responsible for sending a signal to turn off the compressor when the set temperature is reached. If the contacts inside the thermostat are “stuck” in the closed position or the sensor transmits incorrect data about the heat in the chamber, the motor will work without stopping.
In models with mechanical control, the thermostat is a device with a capillary tube that is attached to the evaporator. Over time, the tube can become dislodged, lose its seal, or become coated with ice, causing it to no longer read temperature correctly. In electronic models, they are responsible for this sensors, which can oxidize or fail electrically.
- ❄️ Symptoms breakdowns: The refrigerator freezes too much, a “fur coat” forms on the back wall, and the motor hums continuously.
- 🔌 Diagnostics: To check the mechanical thermostat, you can temporarily close its contacts. If the compressor starts and stops when it opens, the sensor is faulty.
- 💡 Electronic systems: An error code may light up on the display indicating an open circuit of the sensor (for example, F1 or F2 depending on the model).
Replacing the thermostat is a procedure that you can do yourself if you have electrical skills. However, in models Stinol with a system No Frost access to the sensor may be difficult, which will require partial disassembly of the internal lining.
How to check the thermostat with a multimeter?
Unplug the refrigerator. Remove the thermostat and test its contacts. In the normal state they should ring (be closed). Immerse the capillary tube in cold water with ice - after a few minutes the contacts should open and the device will show a break. If this does not happen, the part needs to be changed.
Freon leakage and violation of the system tightness
If the refrigerator works without interruption, but at the same time doesn’t freeze or freezes very weakly, there is a high probability of a refrigerant (freon) leak in the system. The compressor tries to catch up the temperature, working hard, but due to a lack of working fluid, heat exchange does not occur. This is a classic situation when the equipment hums for days, but it’s warm inside.
A leak can occur in the places where the tubes are soldered, in the evaporator (especially if it was damaged when defrosting with a knife) or in the heating circuit of the door perimeter. It is difficult to visually determine the location of the leak, since freon is a colorless and odorless gas. However, indirect signs are swelling of the housing walls or the appearance of oily stains in the lower part of the unit.
The table below shows the main signs that help distinguish a freon leak from other faults:
| Symptom | Freon leak | Malfunction thermostat | Problem with the relay |
|---|---|---|---|
| Temperature in the chamber | Above normal (warm) | Below normal (freezing) | May not turn on or work jerkily |
| Compressor operation | Hot, works constantly | Works constantly | Clicks, hums, but does not start |
| Frost on the evaporator | Absent or only at the input | Solid, thick layer | Depends on the cycle |
| Sound of operation | No changes or quieter than usual | No changes | Loud clicks, buzzing |
It is impossible to fix the leak and refill the refrigerator with freon on your own. This requires special equipment: a vacuum pump, a pressure gauge station and scales. Attempts to simply “add gas” without finding and eliminating a hole in the circuit will only lead to a temporary effect and final breakdown of the compressor.
Sticking of the start relay and problems with the motor
The starting relay is a small block that is mounted on the side of the compressor housing. Its task is to provide an impulse to start the engine and turn off the starting winding. If the relay contacts burn out or the mechanism jams, current continues to flow to the windings, and the compressor cannot switch to operating mode or, conversely, does not turn off when needed.
Often owners confuse the continuous operation of the compressor with frequent switching on and off (cycling). If you hear a characteristic click, followed by a hum, and then another click and silence, this is a sign of a problem with the start relay or the motor itself. The engine tries to start, but cannot, the thermal protection is triggered, and the process repeats.
In some cases, the problem lies in itself compressor. Wear of the piston group or interturn short circuit of the windings leads to the fact that the motor loses power. It works constantly, trying to compensate for low productivity, but it does not provide the desired cold. The interturn short circuit can only be determined using an ohmmeter by measuring the resistance of the windings.
- 🔨 Replacing the relay: Remove the old relay (after photographing the connection diagram) and install a new one, strictly corresponding to the compressor model.
- ⚡ Checking the windings: The resistance between the contacts should be within 10-30 Ohms. If the device shows zero or infinity, the motor is burned out.
- 🔥 Overheating: If the compressor is so hot that it is impossible to touch it and smells of burnt insulation, this is a critical malfunction.
⚠️ Attention: Never leave a refrigerator with a faulty start relay plugged in for a long time. This can lead to a fire in the wiring or complete combustion of the compressor windings.
Influence of the environment and correct installation
Sometimes the reason for the unnaturally long operation of the refrigerator Stinol is trivial and lies in the conditions of its operation. A refrigeration unit is a heat engine that transfers heat from inside to outside. If heat removal is difficult, operating efficiency drops and the compressor is forced to work longer to compensate for losses.
The first enemy of proper operation is a dirty condenser. On the back wall of the refrigerator (or in the base, depending on the model) there is a radiator grille. Over time, it becomes covered with a thick layer of dust, lint and pet hair. This creates a “thermal insulating coat” that prevents the freon from cooling down. As a result, the pressure in the system increases, and the refrigerator cannot turn off.
The second factor is the location of the device. If Stinol stands close to the wall, in a niche or next to a stove (stove, radiator), air circulation is disrupted. The instructions require leaving a gap of at least 5-10 cm from the back wall to the furniture for free convection.
☑️ Checking operating conditions
It is also worth considering the ambient temperature. If the room where the refrigerator is located is hot (above +30°C), the compressor operating time will naturally increase. In such conditions, it may not turn off for hours, and this will be the norm until the temperature in the room drops.
Faults in the No Frost system
In refrigerators Stinol with a system No Frost Continuous operation of the compressor is often associated with problems in the defrost system. If the evaporator in the freezer (which is hidden behind a plastic panel) becomes covered in ice, the airflow will be blocked. The refrigerator “thinks” that it is warm in the chamber and does not turn off, although in fact it can be very cold there, but only in the evaporator area.
Three elements are responsible for the defrosting process: a heating element (heater), a defrost timer (or electronic module) and a defrost sensor (defrost thermostat). If any of them fails, the ice does not melt, a “fur coat” builds up, and the fan stops moving air through the chambers. The compressor works without interruption, trying to cool the sensors that are located in the area where cold air does not flow.
You can diagnose this problem by listening to the operation of the fan. If you hear the hum of the motor, but there is no blowing noise, or there is barely any blowing from the freezer, most likely the evaporator is clogged with ice. In this case, it is necessary to completely defrost the refrigerator (for at least 24 hours with the doors open) and then check the elements of the defrosting system.
What will happen if you ignore the problem with No Frost?
The ice will build up until it completely blocks the fan. This will lead to overheating of the fan motor and possible failure of the compressor due to overload. In addition, the products in the main chamber will begin to deteriorate.
Frequently asked questions (FAQ)
How long should the Stinol refrigerator operate normally?
Under normal conditions, the compressor operating cycle is approximately 15-20 minutes, followed by a pause of about 15-20 minutes. 20-40 minutes. The working time ratio is usually around 30-40%. If the refrigerator works for 40 minutes and rests for 5 minutes, this is already a sign of overload or malfunction.
Can the refrigerator not turn off due to poor door insulation?
Yes, if the rubber door seal is worn out, dirty, or the door itself is warped, warm air constantly enters the chamber. The compressor tries to compensate for heat loss and runs non-stop. Check the tightness of the door with a sheet of paper: it should be pulled out with force along the entire perimeter.
Is it dangerous for the compressor to work without a break for several days?
Extremely dangerous. Compressors in household refrigerators are not designed to operate for long periods of time without pauses for cooling. This leads to overheating of the oil, loss of its lubricating properties, jamming of the piston group and eventual combustion of the windings. If the refrigerator does not turn off for more than 12 hours, you need to turn it off and look for the reason.
Why does the new Stinol refrigerator not turn off for a long time after the first turn on?
When turned on for the first time or after long transportation, the refrigerator needs time (from 6 to 24 hours) to reach operating temperature in all volumes of the chambers and stabilize the pressure in the system. During this period, continuous operation of the motor is the norm. Do not load the chambers with food on the first day.