When your refrigerator Stinol stops maintaining the required temperature or starts working without interruptions, the first thought is often a compressor breakdown or a freon leak. However, in most cases, the problem is much simpler - the thermostat fails. This device is responsible for turning the motor on and off, maintaining the set temperature in the chambers. thermostat (thermostat). This device is responsible for turning the motor on and off, maintaining the specified temperature in the chambers.
Understanding where the thermostat is located on the Stinol refrigerator will allow you to carry out initial diagnostics or even replace the part yourself, saving on calling a technician. The location of this element depends on the specific model and type of control - mechanical or electronic. In this article we will look at all the nuances of finding, checking and replacing this important unit.
What is a thermostat and how does it work
A thermostat is a mechanical or electronic device that reads the temperature inside the refrigeration chamber and sends a command to turn the compressor on or off. In old and budget models Stinol most often, a mechanical principle of operation is used, based on the expansion and compression of gas or liquid inside the bellows.
When the temperature in the chamber rises above the set value, the gas in the capillary tube expands, the pressure rises, and the contacts close, starting the motor. When the desired cold is achieved, the process proceeds in the reverse order. Malfunction This mechanism leads to the fact that the refrigerator either does not turn on at all, or freezes to the point of a glacier.
Electronic sensors, which are found in more modern versions, work on the principle of changing resistance depending on temperature. They send signals to control module, which already makes the decision to start the compressor. Despite the difference in design, they have the same function - climate control inside the unit.
⚠️ Attention: Before any manipulations with the electrical components of the refrigerator, be sure to disconnect it from the network. Working with 220V voltage without the appropriate skills and tools can be life-threatening.
It is important to understand that mechanical thermostats lose their elasticity over time, and their contacts can burn out. This is a natural wear and tear process. If your refrigerator is more than 7-10 years old, the probability of failure of this particular unit is extremely high.
Thermostat location in models with mechanical control
In classic refrigerators Stinol with a drip defrosting system and mechanical control, the thermostat is usually located inside the refrigerator compartment. This is the most common scheme for equipment produced in the 90s and early 2000s. Finding it will not be difficult if you know where to look.
Usually the temperature regulator is combined with the mode switching handle. This handle can be located in different places, depending on the specific modification:
- 🔹 On the right or left side wall of the refrigerator compartment, closer to the ceiling of the chamber.
- 🔹 In the upper part of the chamber, built into the lighting panel or next to the lamp shade.
- 🔹 On the front of the case, if the model requires external access (less common).
To get to the mechanism itself, you need to remove the plastic lever handle. It is usually simply pulled onto the thermostat rod. Under the handle you will see a nut or screw that secures the device. After removing the decorative trim and unscrewing the fasteners, the thermostat unit can be carefully removed from the niche.
A long line extends from the thermostat capillary tube, which goes deep into the body and goes around the evaporator. It is this tube that senses the temperature. Be extremely careful when removing: if the tube is damaged or its seal is broken, the thermostat will have to be thrown away, since it cannot be repaired.
Where to look for the sensor in models with the No Frost system
Refrigerators Stinol with the system No Frost are more complex. In them, the thermostat (or defrost sensor) is often hidden behind plastic panels. In such models, temperature control can be carried out not only in the refrigerator, but also in the freezer, or through a common air duct.
Most often in the No Frost system, the air temperature sensor is located in the upper part of the refrigerator, behind the decorative panel where the air ducts are located. To gain access to it, you will need to partially disassemble the interior:
- Release the shelves and drawers.
- Unscrew the screws securing the back or side plastic panel.
- Carefully bend the fasteners and remove the plastic.
Under the panel you you will see the evaporator and the wires suitable for it. The temperature sensor in these models often looks like a small plastic cylinder or “bullet” at the end of a wire, unlike the mechanical “boxes” in conventional models. Also important in the No Frost system is the defrost sensor, which is located directly on the evaporator and controls the defrosting process.
In some modifications of Stinol with electronic control, sensors can be located in a special technological compartment behind the rear wall of the refrigerator, access to which is only possible from the compressor compartment at the back of the unit. However, this is rather an exception for complex two-compressor models.
| Model type | Location of the regulator | Sensor type | Difficulty of access |
|---|---|---|---|
| Single chamber | Inside the chamber, under the handle | Mechanical | Low |
| Two-chamber (drip) | In the refrigerator compartment | Mechanical | Medium |
| No Frost | Behind the duct panel | Electronic/Mech. | High |
| With display | Control module / Rear | Electronic | High |
Why are there more sensors in No Frost?
In the No Frost system, it is important to control not only the air temperature, but also the evaporator temperature for correct operation defrost. Therefore, there may be a whole set of sensors: one main for cooling, another for defrosting, a third for protection against overheating.
Symptoms of a malfunctioning thermostat
Before disassembling the refrigerator in search of a thermostat, you should make sure that the problem is really in it. Symptoms may be different, and not all of them clearly indicate a sensor failure. However, there are characteristic signs that occur most often.
If the Stinol refrigerator works non-stop, without turning off for days, and at the same time a “fur coat” forms in the chamber or everything freezes - this is a sure sign that the thermostat is “stuck” in the “on” position or has lost sensitivity. The mechanism simply does not see that the required temperature has already been reached.
The opposite situation: the unit is silent and does not start, although the chamber is warm and the light is on. This means that the thermostat contacts do not close and the command to start the compressor is not received. In this case, short-circuiting the wires (for diagnostics) often helps, but this should be done by a person who understands electrics.
- ❄️ The compressor hums, but does not start, the thermal protection is triggered.
- ❄️ The refrigerator turns on for 10-20 seconds, then turns off for a long time period.
- ❄️ The temperature in the chamber does not correspond to the position of the regulator knob.
⚠️ Attention: If the compressor hums, but does not start, and after a couple of seconds a click is heard, perhaps the problem is not in the thermostat, but in the starting relay or the motor itself. Do not blindly change the sensor if you have not carried out diagnostics.
Instructions for dismantling and replacing the thermostat
If you are convinced that the thermostat is faulty, it must be replaced. Repairing this unit is usually impractical, since it requires special equipment for filling the bellows with gas. It's easier to buy a new analogue that is compatible with your model Stinol.
The process of replacing a mechanical thermostat is as follows. First remove the temperature control knob. Then unscrew the mounting screw and carefully pull the thermostat housing out. Your task is not to damage the capillary tube, which can be attached to the body or evaporator inside.
☑️ Checklist before replacing the thermostat
The next stage is working with the wires. There are usually two or three of them. Be sure to Take a photo the connection diagram before disconnecting them. If the wires are mixed up, you can cause a short circuit or damage the compressor. Disconnect the terminals and remove the old sensor.
Installing the new one is done in the reverse order. Insert the sensing tube into the same hole where you removed the old one. The planting depth must be identical, otherwise the thermostat will not work correctly. Secure the case, connect the wires according to the photo and install the handle in place.
Sequence of actions:
1. Remove the handle -> 2. Unscrew the nut -> 3. Take a photo of the wires -> 4. Disconnect the terminals -> 5. Remove the tube -> 6. Install a new one -> 7. Connect the wires -> 8. Check the operation.
After assembly, plug in the refrigerator. He must earn it. Pay attention to the cyclical operation: it should get cold and turn off. If the work is restored, then you have successfully completed the task.
Checking the thermostat with a multimeter
For those who want to be 100% sure of the diagnosis, there is a method of checking using multimeter. This is a device that measures electrical resistance and rings circuits. With its help, you can accurately determine whether the thermostat contacts are closed.
To check, you need to remove the thermostat from the refrigerator (after unplugging it from the mains!). Switch the multimeter to continuity or resistance measurement mode. Connect the probes to the thermostat contacts. In the room