Modern household appliances, such as Stinolare equipped with complex electronics that control the cooling process. One of the key elements of this system is a temperature sensor, which is responsible for maintaining a given temperature regime. If you notice that food has begun to deteriorate faster than usual or, conversely, to freeze in the main compartment, the problem often lies in the malfunction of this small device. Understanding where it is temperature sensorwill help you independently carry out initial diagnostics or even replace the element.
In brand refrigerators Stinol the location of the sensor can vary significantly depending on the type of defrosting system and the specific model of the unit. There are designs with a system No Frost, where the sensors are built into the evaporator defrost system, and models with a drip system, where the sensors are located directly in the storage chamber. Incorrect determination of the installation location can lead to damage to the plastic or loss of seals, so it is important to act carefully and consistently.
Before proceeding with disassembly, it is necessary to completely de-energize the device. Working with live electrical components is strictly prohibited by safety regulations. In addition, to access the internal components, you will need to remove shelves, drawers, and possibly dismantle the back wall of the chamber. Only after preparing the workspace can you begin to search for thermostat or an electronic sensor.
The principle of operation and types of sensors in Stinol
To effectively search for a fault, you need to understand how the climate control system in your refrigerator works. The models Stinol use various types of sensors, each of which performs its own function. The main difference lies in the principle of operation: mechanical thermostats operate based on the expansion of gas or liquid in a capillary tube, while electronic ones change their resistance depending on the ambient temperature. thermistors change their resistance depending on the ambient temperature.
Electronic sensors, which are often found in newer models, are compact elements enclosed in plastic body They transmit a signal to the electronic control module, which in turn starts or stops the compressor. Mechanical regulators usually have an adjustment knob on the front panel or inside the chamber, and their sensitive part (bellows) is located in a special channel or pressed against the evaporator. An error in determining the type of sensor may lead to the purchase of the wrong spare part.
⚠️ Attention: Electronic sensors are very sensitive to mechanical damage. Do not attempt to test their operation by heating them with an open flame or sharply cooling them with an aerosol unless necessary, as this may permanently change their calibration.
The system No Frost often uses several sensors simultaneously. One is responsible for the air temperature in the chamber, the other controls the degree of freezing of the evaporator, and the third can monitor the defrost temperature. If one of them fails, the refrigerator may stop freezing or, conversely, create a “glacier”. Accurate diagnostics requires knowledge of the location of each element.
Location of the sensor in the fridge compartment
In refrigerators Stinol with a drip defrosting system, the temperature sensor is most often located inside the main chamber. The classic installation location is the right wall or ceiling of the compartment. In older models with mechanical control, the thermostat can be built into the housing, and its capillary tube is inserted inside through a special hole in the rear wall. In such cases, you see only the adjustment knob, and the sensitive element itself is hidden behind the panel.
If we are talking about electronic control, the sensor is usually mounted on the inner surface of the back wall or side panel. It can be hidden under a decorative plastic cover. To get to it, you often need to remove the top shelf or lampshade. In some modifications, the sensor is hidden in a special recess, closed with a removable plug, to prevent accidental damage when moving products.
When searching, pay attention to the wires coming from the control board or from the ceiling of the chamber. They often lead directly to the location of the sensor. For models with a door display, a sensor inside the chamber serves as the primary source of temperature display. If the readings on the display do not correspond to reality, the problem may be in the displacement of the sensor or its contacts.
Searching for a sensor in the freezer compartment No Frost
The situation with the freezer compartment in the systems No Frost is radically different. Here, temperature sensors do not hang in the air, but are built directly into the air circulation system or attached to the evaporator. Most often they are located behind the back panel of the freezer, which hides the fan and defrost heater. Access to this zone requires complete defrosting of the unit during the day.
To access the sensor, you must remove all the drawers, then remove the fasteners of the rear wall. In models Stinol these may be screws under plastic plugs or special clips. After removing the panel you will see the aluminum evaporator. The defrost sensor is usually fixed in a special aluminum sleeve inserted between the turns of the evaporator, or pressed against it with a plastic clamp.
It is important not to confuse the temperature sensor with the heating element (heating element). The heating element looks like a curved tube, often in a quartz or metal casing, located at the bottom of the evaporator. The sensor is a small plastic “mushroom” or cylinder with two wires. An error during replacement may lead to a short circuit or lack of defrosting.
☑️ Preparing to disassemble the freezer
Dismantling and access to the insides of the evaporator
The process of removing the back panel in refrigerators Stinol requires accuracy. Plastic that has been exposed to low temperatures for a long time becomes brittle. Sudden movement or force may cause the mounting lugs to break. Before starting work, it is recommended to heat the plastic with a hairdryer at a minimum temperature to make it more elastic.
After removing the panel, you will have a view of the evaporator. Sensors here can be installed at different points depending on the model year. In some cases they are located in the upper part of the heat exchanger, in others - in the middle. The wires from them go either directly to the control board or are connected through an intermediate connector. When dismantling the old sensor, be sure to remember or photograph the connection diagram.
When installing a new element, make sure that it fits tightly to the surface of the evaporator or sits in the sleeve until it stops. Any air gaps will result in skewed temperature readings. For better heat transfer, special thermal paste is sometimes used, although in factory conditions they often make do with a tight fit. Do not forget to restore the thermal insulation layer if you damaged it during operation.
What will happen if the sensor is installed incorrectly?
If the sensor is not in close contact with the evaporator, it will show the temperature of the air, not the surface. This will cause the refrigerator to “think” it is already cold and turn off the compressor prematurely. Products will begin to deteriorate. Or, on the contrary, the defrost cycle will not start, and the evaporator will become overgrown with ice, blocking the air supply channels.
Diagnostics and performance testing
After you have reached the sensor, it must be checked. The easiest way is visual inspection. If cracks, traces of burning or melting are visible on the body, the element definitely requires replacement. Also check the integrity of the wires: they should not be broken or cut. Often the problem lies precisely in an open circuit, and not in the sensor itself.
For more accurate diagnostics, you will need a multimeter. Switch the device to resistance measurement mode (Ohms). At room temperature, a working thermistor should show a certain resistance, which changes when heated or cooled. The values depend on the specific model Stinol, but usually they are in the range of several kilo-ohms. If the device shows infinity or zero, the sensor is faulty.
The table below shows approximate resistance values for common types of sensors used in refrigeration technology:
| Sensor type | Temperature (°C) | Resistance (kOhm) | Tolerance |
|---|---|---|---|
| Thermistor 6 kOhm | +25 | 6.0 | ±5% |
| Thermistor 6 kOhm | 0 | 16.5 | ±10% |
| Thermistor 6 kOhm | -20 | 65.0 | ±15% |
| Thermistor 10 kOhm | +25 | 10.0 | ±5% |
If you don’t have a multimeter, you can try the elimination method. Replace the suspect sensor with a known good one. If the refrigerator works correctly, then the problem has been found. However, this method requires the availability of spare parts and carries the risk of installing the wrong element, so the use of measuring instruments is preferable.
Replacing and setting up a new element
The replacement process begins by disconnecting the wires from the old sensor. In some models Stinol the wires can be twisted and insulated, in others special connectors are used. When twisting, be sure to use high-quality insulation or heat-shrink tubing to avoid oxidation of the contacts in high humidity conditions.
Install the new sensor in place of the old one, observing the original installation diagram. If sealant or thermal paste was used, apply a new coat. After assembling all panels and returning the refrigerator to working position, do not rush to load food. Let the unit run idle for several hours so that the system returns to normal and you can verify that the temperature readings are correct.
⚠️ Attention: Technical characteristics and location of components may vary slightly depending on the modification and year of manufacture of the refrigerator. Always check the technical documentation of the specific model or consult with an official service center if the design differs from that described.
Frequently asked questions (FAQ)
Can the refrigerator be used? Stinol with a faulty sensor?
Short-term operation is possible, but undesirable. If the sensor “lies” towards higher temperatures, the compressor will work non-stop, which will lead to overheating and high energy consumption. If the sensor shows that there is no cold, the compressor may not turn on at all, which will lead to defrosting of the food.
Why does the refrigerator not freeze after replacing the sensor?
Perhaps a sensor with different resistance parameters is installed. The cause may also be poor contact at the junction of the wires or incorrect installation (loose fit to the evaporator). Check the connection diagram and make sure that you have purchased a compatible sensor model.
How often should you change the temperature sensor?
Temperature sensors do not have a strict expiration date. They are changed only when they fail. Under normal operating conditions, they can last 10 years or more. Frequent breakdowns can be caused by power surges in the network or mechanical damage during defrosting.
Where to buy an original sensor for Stinol?
Original spare parts can be found in specialized refrigeration equipment stores or ordered through service centers. However, for many models, universal analogs are suitable, which are cheaper and more accessible. The main thing is resistance at room temperature.