Brand refrigerators Pozis are deservedly popular due to their reliability and affordable cost, However, over time, even the best technology may require intervention. One of the most common symptoms of a malfunction is a violation of the temperature regime, when the unit either stops freezing or works without stopping. In most cases, the reason lies in the failure of the thermostat, which is responsible for controlling the temperature inside the chambers.
Finding this element often causes difficulties for owners, since its location depends on the specific model and year of manufacture of the device. In some modifications it is hidden behind a plastic cover, in others it is integrated into the general control panel or placed on the rear wall of the case. Understanding where is the thermostat on the Pozis refrigeratoris the first and most important step before starting any repair.
Incorrectly determining the location of the sensor can lead to damage to plastic elements or a violation of the tightness of the system. In this article, we will analyze in detail all possible options for placing the regulator, methods for diagnosing them, and a step-by-step algorithm for self-replacement. You will learn how to safely access the unit without damaging other important components of the refrigerator.
Main signs of a malfunctioning thermostat
Before you begin disassembling the case and searching for internal components, you need to make sure that the problem really lies with the thermostat. Symptoms of a breakdown can vary, and it is important not to confuse them with a compressor malfunction or a freon leak. If you notice that the refrigerator Pozis works continuously without turning off, or, conversely, is silent when the evaporator is defrosted, this is a direct indication of checking the sensor.
A frequent sign is the formation of a large “coat” of ice in the refrigerator compartment or, on the contrary, a complete absence of cold when the motor is running. It is also worth paying attention to the products: if they begin to quickly deteriorate or freeze even with the minimum regulator settings, the temperature control system has failed. It is also important to check the condition of the regulator itself: if the handle turns too easily or, on the contrary, is jammed, the mechanism is damaged.
- ❄️ The refrigerator works without interruptions, the compressor does not turn off even at night.
- 🌡️ The temperature in the chambers does not correspond to the set values on the regulator.
- 🧊 The appearance of excessive amounts of ice or a complete lack of cooling.
- 🔌 Spontaneous turning on and off of the unit at short intervals.
⚠️ Attention: If the compressor does not start at all and does not make any sounds, the problem may not be in the thermostat, but in the starting relay or the compressor itself. engine Carry out initial diagnostics by testing the circuit with a multimeter before disassembling the refrigerator.
Ignoring these symptoms can lead to more serious consequences, including overheating of the compressor and its complete failure. The thermostat is a relatively cheap part, replacing which is much cheaper than repairing the motor. Therefore, at the first signs of unstable operation, it is recommended to conduct a thorough check of the sensor’s electrical circuit.
Where to look for the thermostat in different Pozis models
The location of the thermostat directly depends on the design of the refrigerator and the type of control (mechanical or electronic). In classic two-chamber models Pozis with an upper freezer and mechanical control, the sensor is most often located inside the refrigerator compartment. It can be hidden behind a decorative trim on the ceiling of the camera or integrated into the lighting control unit.
In models with the No Frost system or in more modern series, access to the sensor may be limited by plastic panels on the rear wall. Sometimes the thermostat is placed outside, on the top of the refrigerator body, where it is covered with a plastic casing. In such cases, access does not require opening the insides of the chamber, which simplifies the replacement procedure.
It is worth noting that in some modifications not one, but several temperature sensors are used. The main thermostat controls the operation of the compressor, and additional ones may be responsible for displaying the temperature on the display or controlling fans. It is important not to confuse them when diagnosing, as they have different resistances and functions.
Location features in old models
In old-style Pozis refrigerators (manufactured before 2010), the thermostat was often attached directly to the evaporator inside the freezer. Access required completely defrosting the unit and removing the back panel of the freezer, which took a lot of time.
To accurately determine the installation location in your model, it is best to use technical documentation or diagrams specific to a specific serial number. However, knowing the general principles of the layout Pozis refrigerators, you can significantly reduce the search time and avoid unnecessary dismantling work.
Instructions for accessing the thermostat inside the chamber
If your refrigerator is of a classic design, where the thermostat is located inside the refrigerator compartment, the access procedure will require care. First, you need to completely empty the chamber of products and remove the shelves to provide free space for work. Disconnect the appliance from the power supply - this is a mandatory safety requirement.
In most cases, the thermostat is hidden behind a plastic panel on the “ceiling” of the chamber, next to the lampshade. You will need to carefully remove the shade; it is usually held in place by clips or a single screw. Under it or next to it you will see a plastic cover behind which the control unit is hidden.
☑️ Preparation for disassembly
Next, unscrew the screws securing the decorative trim. Be careful with plastic latches - they can be fragile, especially if the plastic hasn't been removed in a while. After removing the panel, you will see a block to which the wires from the compressor and the sensor itself are connected. In this case, the capillary tube of the thermostat is usually wound behind the chamber casing and secured to the evaporator.
| Type of access | Location | Required tool | Complexity |
|---|---|---|---|
| Internal | Camera ceiling, under the ceiling | Phillips screwdriver, knife | Middle |
| External (upper) | Upper part of the body, under casing | Flat screwdriver | Low |
| Rear panel | Behind the back wall inside the chamber | Set of screwdrivers, keys | High |
| Integrated | As part of an electronic module | Soldering iron, multimeter | High |
If the thermostat is located deeper, behind the back wall, you will have to remove the entire internal refrigerator panel. This is a more labor-intensive process that requires unscrewing many screws around the perimeter. In such models, the capillary tube is often attached to the evaporator with special clamps, which must be carefully released.
Removing and replacing the temperature sensor
After you have reached the thermostat, you need to remove the old element. Before disconnecting the wires, be sure to take a photo of the connection diagram or sketch it, so that when installing a new sensor you do not mix up the contacts. An error in the connection may result in a short circuit or improper operation of the compressor.
Unscrew the mounting screws holding the thermostat housing and carefully remove it. The capillary tube must be pulled out very carefully, trying not to bend or damage it. If the tube is attached to the evaporator with clamps, they need to be bent or unscrewed. The new sensor must be similar to the old one in terms of capillary length and type of mounting.
⚠️ Attention: The capillary tube of the thermostat is filled with sensitive gas or liquid. Any deformation, crack or puncture will cause the sensor to instantly lose sensitivity and it will stop working. Treat the tube as if it were glass.
Installing a new thermostat is done in reverse order. Insert the tube into the seat, secure it with clamps and connect the wires according to your diagram. Make sure the contacts fit snugly into their sockets and do not move loose. After this, you can assemble the plastic lining and return the lighting shade to its place.
Diagnostics and performance testing
Before finally assembling the refrigerator, it is recommended to check the functionality of the installed thermostat. To do this, you will need a multimeter switched to continuity or resistance measurement mode. Remove the wires from the sensor contacts and connect the multimeter probes to the terminals.
At room temperature, the contacts of most thermostats should be closed, and the multimeter should show zero or beep. If you turn the control knob to the “minimum” or “off” position, the circuit should open and the device will show one (infinity). Lack of response indicates a malfunction of the part.
You can also carry out a “heat” test. Take the sensor in your hand or dip its end (capillary) in warm water. After some time, if the sensor is working properly, you should hear a click indicating that the contacts have opened. This confirms that the sensitive element responds to changes in temperature.
If the test shows that the new sensor is working correctly, you can complete the assembly. Plug in the refrigerator and set the control knob to the middle position. After 30-40 minutes, check whether the compressor has started and whether cold has begun to form.
Common mistakes during self-repair
DIY Repair of refrigerators Pozis can be successful, but beginners often make common mistakes that nullify all efforts. One of the most common is ignoring safety rules and working with a device connected to the network. This is not only a risk of electric shock, but also the possibility of burning electronic components.
Another common mistake is using excessive force when disassembling plastic elements. Plastic, especially in older refrigerators, becomes brittle. Sudden movements or the use of inappropriate tools (for example, a knife instead of a plastic spatula) can lead to breakage of the latches and cracks in the body.
- 🔧 Using uncalibrated tools or incorrect screwdrivers.
- 🧊 Attempting to replace the thermostat without first defrosting (in No Frost models).
- 🔌 Mixing up the wires when connecting a new sensor.
- ⚙️ Ignoring checking the door seals after assembly.
⚠️ Attention: Technical characteristics and internal structure of Pozis refrigerators may vary slightly depending on the year of manufacture and the specific modification. Always check the product data sheet or diagrams on the manufacturer’s official website before starting work.
Do not forget about the cleanliness of the workplace. Moisture, dust or small parts that get inside the camera can cause corrosion or jamming of the mechanisms. Work in good light and use a container to store the screws to avoid losing them.
Can I use a thermostat from another refrigerator?
The use of analogues is possible, but only if they have identical electrical characteristics and capillary tube length. Sensors from refrigerators of other brands may have a different response range, which will lead to improper operation of the compressor.
How long does the thermostat in a Pozis refrigerator last?
The average service life of a mechanical thermostat is 5-7 years of intensive use. Electronic sensors can last longer, but they are more sensitive to power surges.
Why does the refrigerator turn on immediately after it is turned off?
This may indicate sticking thermostat contacts or that the sensitive element has lost its seal. Also, the cause may be a malfunction of the compressor start relay.
Is it necessary to defrost the refrigerator before replacing the thermostat?
In models with a drip system, defrosting is required if access to the thermostat is inside the chamber and there is a risk of moisture getting on the contacts. In No Frost models, complete defrosting is also recommended for ease of operation.