Refrigeration equipment of the brand Stinol, despite the active production of more modern models, is still actively used in many homes due to its reliability and maintainability. The central element of the climate control system in these units is the thermostat, which is often called the “heart” of the refrigerator compartment. It is this small device that is responsible for maintaining the stable temperature necessary for long-term storage of products, and controls the compressor operating cycles.
Understanding this what is a thermostat used in a Stinol refrigeratorallows owners to notice the first signs of breakdown in time and avoid spoilage of a large number of products. If this component fails, the entire balance of the unit's operation is disrupted: food can either defrost or turn into ice blocks. In this article, we will analyze in detail the design of the regulator, symptoms of its malfunction and diagnostic methods.
It is important to note that modern models can be equipped with electronic sensors, but classic ones Stinol most often use mechanical thermostats. Their design is time-tested, but they are also subject to wear. Having understood the principles of operation of this unit, you can independently carry out initial diagnostics and decide whether to call a technician or replace the part yourself.
The basic principle of operation of the thermostat
The thermostat is an electromechanical device that responds to changes in temperature inside the refrigeration chamber. Its design is based on a sealed tube filled with sensitive gas or freon, which is attached to the evaporator. When the temperature in the chamber rises, the gas in the tube expands, creating pressure on the membrane, which leads to the closure of the electrical contacts and the start of the compressor.
As soon as the air in the chamber is cooled to a set value, the reverse process occurs: the gas is compressed, the pressure drops, and the contacts open, stopping the operation of the motor. This cycle provides stable temperature conditions. If the thermostat stops responding correctly to changes, the compressor may work continuously or not turn on at all, which is critical for the safety of products.
Models Stinol often use TAM or K-59 series regulators, which are distinguished by their calibration accuracy. However, over time, the springs weaken and the sensitivity of the tube decreases. The critical parameter is the moment of contact opening: if it moves even a couple of degrees, the food in the refrigerator compartment may begin to deteriorate.
Why does the gas in the tube not evaporate?
The thermostat tube is completely sealed and made of copper or steel. The gas inside is under pressure corresponding to the operating temperature range. Depressurization occurs only in the event of mechanical damage or severe corrosion, which rarely happens without external intervention.
Key functions of the temperature controller
The main task of the device is to automatically maintain the specified microclimate parameters. Without a working thermostat, the refrigerator turns into a simple insulated box that is unable to generate cold as needed. Let's look at the main functions in more detail.
Firstly, this control of the cyclic operation of the compressor. The thermostat determines when the engine needs to turn on to pump in the cold, and when you can rest. This prevents both equipment overheating and unnecessary energy consumption. Secondly, the device provides protection against overloads, opening the circuit when the minimum temperature is reached.
- ❄️ Adjustment of the temperature in the refrigerator compartment in the range from +2 to +8 degrees Celsius.
- ⚡ Automatic shutdown of the compressor when the set values are reached values.
- 🛡️ Protecting the evaporator from excessive icing (in models with a drip system).
- 🔄 Providing a pause for the engine to rest before the next startup cycle.
It is worth noting that in two-chamber models Stinol thermostat usually installed in the refrigerator compartment, and the freezer operates in a "super freeze" mode or depends on the general cycle. Therefore, a malfunction of the regulator primarily affects fresh food, and not freezing.
Typical symptoms of a thermostat malfunction
You can determine that Thermostat of the Stinol refrigerator it is out of order by a number of characteristic signs. Most often, owners notice that the food in the main chamber begins to deteriorate faster than usual or, conversely, becomes covered with frost. The compressor may hum continuously or be silent for hours.
One of the most obvious symptoms is the absence of a click when turning the regulator knob. In good condition, when switching from minimum to maximum and back, you should hear a clear sound of contacts opening or closing. If the handle rotates freely, but there is no characteristic sound, there is a high probability of failure of the internal mechanism.
⚠️ Attention: If the compressor operates around the clock without shutdowns, and the temperature in the chamber drops below 0 degrees, this is a direct sign of the thermostat contacts sticking in the “on” position. Immediately unplug the device to avoid burning out the motor.
You should also pay attention to the condition of the evaporator. If it is covered with a uniform layer of frost, but the compressor does not turn off, it means that the heat-sensitive tube has lost contact with the surface or the sensor itself has stopped transmitting the signal. In some cases, the malfunction manifests itself in the form of short operating cycles: the motor turns on for 2-3 minutes and turns off without having time to cool the chamber.
☑️ Thermostat diagnostics
Diagnostics and performance check
Before buying a new part, you need to make sure the diagnosis is correct. Diagnosis of the thermostat Stinol can be carried out visually and using a multimeter. First, you should locate (find) the location of the device: usually it is hidden under a plastic panel inside the refrigerator compartment or behind a decorative trim on the outside.
For an accurate check, you will need to remove the regulator and “ring” its contacts with a tester. In normal condition (at room temperature), the contacts should be closed, and the device will show zero or a resistance value close to it. If the multimeter shows infinity (break), the thermostat is faulty and requires replacement.
Another method is “freezing”. Place the thermostat sensing tube in the freezer for 15-20 minutes, after disconnecting it. After removal, quickly check the contacts: they should open (the resistance will become infinite) as they heat up. If this does not happen, it means regulator mechanism lost sensitivity.
Working with live electrical components is prohibited by safety regulations. If you are not confident in your skills in working with electrical appliances, it is better to entrust this procedure to a professional.
Comparative table of thermostat parameters
When choosing a replacement, it is important to take into account the technical characteristics of the original part. For refrigerators Stinol certain models of regulators are most often suitable, which differ in the length of the capillary tube and the temperature range of operation.
| Thermostat model | Tube length (cm) | Switching temperature (°C) | Switch-off temperature (°C) | Application |
|---|---|---|---|---|
| TAM 133 | 0.75 | -12..-14 | -20..-24 | Single-chamber refrigerators |
| K-59 | 0.75 | -10..-12 | -22..-24 | Two-chamber Stinol |
| TAM 145 | 1.3 | -10..-12 | -24..-26 | Freezers |
| K-57 | 0.75 | +3..+5 | +10..+12 | Refrigerator compartment |
As can be seen from the table, the response parameters can differ significantly. Installing an inappropriate thermostat will lead to incorrect operation: either the chamber will not cool to the required values, or the food will freeze. Always check the markings on the body of the old part before purchasing a new one.
Replacement process and device setup
Replacing the thermostat in the refrigerator Stinol is a procedure that requires care, but can be done by your own hands. The first step is always to disconnect the unit from the power supply. Then the protective panel is removed, blocking access to the regulator, and the electrical wires are disconnected (it is advisable to photograph the connection diagram).
The most crucial moment is removing the old capillary tube from the evaporator. It can be attached with staples or simply inserted into the technological hole. You must act carefully so as not to damage the aluminum tubes of the evaporator, since their repair will require calling a technician with equipment for refilling freon.
The new tube is inserted into the same hole to the same depth as the old one. The excess length is neatly hidden behind the back wall of the camera. After connecting the wires and assembling the structure, it is necessary to carry out the initial setup. The regulator knob is set to the middle position and the refrigerator is left to operate for several hours.
⚠️ Attention: The capillary tube of the thermostat is very thin and fragile. When installing, avoid sharp bends, creases and impacts on it. Violation of the integrity of the tube will lead to gas leakage and complete inoperability of the new thermostat.
Frequently asked questions and answers (FAQ)
Is it possible to temporarily do without a thermostat?
Technically, you can close the contacts directly so that the refrigerator starts freezing constantly. However, this is an emergency measure: the compressor will work without interruption, which will lead to its overheating, huge energy consumption and eventual combustion of the engine. This mode can only be used for short-term freezing of food if the thermostat is broken.
Why does the refrigerator not turn off after replacing the thermostat?
There may be several reasons: the capillary tube is installed incorrectly (it is not deep enough or does not fit tightly to the evaporator), a thermostat with the wrong temperature range is selected, or the problem does not lie in regulator, but in a freon leak or a malfunction of the compressor itself.
How often do you need to change the thermostat in Stinol?
The service life of a mechanical thermostat is on average 10-12 years. However, with frequent power surges or mechanical damage (for example, when defrosting with a knife), it may fail earlier. Scheduled replacement is not required, change only when signs of malfunction appear.
Does the position of the thermostat handle affect its service life?
Constantly placing the handle in extreme positions (minimum or maximum) creates additional stress on the spring mechanism. It is recommended to set the regulator to the middle position (usually the number 3 or 4 out of 5), which ensures optimal operating mode and extends the service life of the part.