Location of the Pozis refrigerator relay: search and replacement

Owners of refrigerators Position often face a situation when the device stops cooling, and the compressor either It buzzes but doesn’t start, or it clicks and immediately goes silent. In most cases, the culprit for such symptoms is a malfunctioning starting relay. This is a small but critical part responsible for starting the compressor engine. Understanding exactly where it is located is the first step to successful repair.

Finding this element does not require deep technical knowledge or disassembling the entire unit body. The design of refrigerators Pozis, whether they are classic models of the series RD or more modern ones Sviyaga, provides easy access to the compressor components. You do not have to move the heavy cabinet or remove the entire back wall, since all the necessary manipulations are carried out in the lower part of the rear panel.

Before taking active steps, you need to completely de-energize the device. Working with electrical components requires compliance with basic safety rules. After disconnecting the cord from the retail outlet, let the equipment stand for about 10-15 minutes so that the residual voltage in the circuits has time to dissipate and the refrigerant stabilizes.

The physical location of the relay is always tied to the compressor. In refrigerators Position the motor-compressor is traditionally fixed in a special niche in the lower part of the rear wall. To see it, you don't need complicated tools—just walk up behind it and lean against the floor. Typically, access to the compressor area is partially or completely blocked by a plastic protective cover, which is easy to remove.

⚠️ Attention: Before removing any protective cover, make sure the floor under the refrigerator is dry. In some older models, there may be a condensate collection tray under the compressor, and careless movement can lead to water spillage on the electrical wiring.

The part you are looking for is attached directly to the side or bottom of the compressor housing, next to the condenser (a black metal radiator). The relay is a plastic block, usually black or white, with a bundle of wires attached to it. Depending on the year of manufacture of your Pozis, the appearance of the part may differ, but the logic of its placement remains unchanged.

Design features and types of relays in Pozis refrigerators

Refrigerators Pozis were produced and are produced using different types of compressors, which directly affects the type of installed starting device. Understanding the type of your relay will help not only in the search, but also in selecting replacement parts. There are mainly two types of mechanisms: induction and posistor.

Induction relays, often labeled as RTK or R-1, are typical for older models. They have an oblong shape and inside contain a coil and a movable core. When voltage is applied, the core retracts, closing the contacts. These devices often make a loud clicking noise when they try to start. They are easy to recognize by the characteristic vertical arrangement of the connection pins.

More modern models, such as Sviyaga-40 or Mir, are equipped with posistor relays (series P-1, P-2 or foreign analogues PTC). They are more compact, often made in the form of a box that is placed directly on the three contacts of the compressor. Inside them there is a thermistor, which heats up and opens the circuit after the engine starts. Posistors they are considered more reliable and quieter in operation.

Can you change the types of relays?

Replacing an inductive relay with a posistor is possible only if the electrical characteristics of the compressor are fully compatible (power, starting current). Simple installation “by size” without checking the parameters can lead to burnout of the motor windings.

It is sometimes difficult to determine the type of malfunction visually, but there are signs. If the relay is inductive and you hear frequent clicks with pauses of several minutes, this is a classic symptom of sticking contacts or burnt out windings inside the relay. If the device is a posistor, it may simply be silent, although the compressor will try to hum.

Step-by-step instructions: how to get to the relay

The process of accessing the start relay in the refrigerator Position is standardized and does not require calling a technician. All actions can be performed independently with a minimal set of tools. The main thing is to act consistently and without excessive force, so as not to damage the plastic clips or copper tubes.

First, move the refrigerator away from the wall, giving yourself easy access to the back wall. If the floor is slippery, place pieces of cardboard or fabric under the front legs to prevent the unit from moving during operation. Remove the rear protective cover of the compressor compartment. It is attached to latches or several screws around the perimeter.

After removing the cover, you will see a black “tank” - this is the compressor. On its side (less often at the bottom) there will be a plastic box with wires suitable for it. This is the start relay. In some models Position a protection can be attached to the same block, which looks like a separate tablet or part of the structure. thermostat protection, which looks like a separate tablet or part of the structure.

To remove a part, you often need to carefully squeeze out the plastic latches of the relay housing or remove the metal bracket, if present. Don't pull the wires! First you need to free the housing from the fasteners, and only then carefully pull it off the compressor pins. Movements must be directed strictly along the axis of the contacts, without distortions.

⚠️ Attention: Copper tubes suitable for the compressor are very thin and fragile. When working in a confined niche space, you cannot accidentally touch them with a tool or your elbow - this will lead to a freon leak and expensive repairs with refilling.

Diagnostics and signs of malfunction

Before running for a new spare part, it makes sense to carry out an initial diagnosis. The absence of cold does not always mean the death of the relay, although this is the most common reason. There are obvious symptoms pointing specifically to this node. If you hear the compressor trying to start, it hums for 3-5 seconds, then there is a click and there is silence - this is the operation of a thermal protection relay, which is triggered due to the impossibility of starting the engine.

The second sign is the characteristic smell of burning or melted plastic in the compressor area. If the relay overheated, the plastic could become blackened or warped. A visual inspection of the removed part often gives the answer: if a ringing sound is heard inside (like from a broken light bulb) or carbon deposits are visible on the contacts, the part is faulty.

The third method is checking with a multimeter. This is a more reliable way. It is necessary to “ring” the relay contacts. In normal condition, the resistance between certain contacts should be close to zero (closed) or, conversely, infinite, depending on the type of relay and position. For posistors, the resistance should increase as it warms up, which is difficult to check without heating, but the primary circuit can be checked.

It is important to distinguish between a relay failure and a failure of the compressor itself. If, after replacing the relay (or temporarily closing the contacts for testing), the engine still does not start, but only hums, the motor itself may have jammed or a winding break has occurred. In this case, DIY repair is practically impossible.

Compatibility and relay characteristics table

When selecting spare parts, it is important to focus not only on appearance, but also on technical parameters. Below is a table to help you navigate the markings often found in refrigerators Position of different years of manufacture.

Please note that the markings may vary depending on the manufacturer of the relay itself, even if it fits your refrigerator. The key parameter is the diameter of the fit on the compressor pins and the rated current. Rated current Must correspond to the power of your motor, otherwise the relay will burn out too quickly or will not be able to start the engine.

If you have not found the exact marking on sale, look for analogues in spare parts catalogs for refrigerators. Many modern universal relays (PTC) are suitable to replace old Soviet ones RTK, but require careful study of the connection diagram, since the number of contacts may differ.

The process of replacing and connecting a new part

Replacing a relay is a technically simple procedure, but requires attention to detail. After you have removed the old part, carefully inspect the contacts on the compressor itself. They must be clean, free of oxides and soot. If black deposits are visible, carefully clean them with fine sandpaper or a file, being careful not to bend the pins.

Install a new part. If you have a posistor relay in your hands, it is simply put on the three contacts of the compressor until it stops. It is important to orient it correctly: usually on the body there is an arrow or inscription UP (top), which should look up. Incorrect orientation may result in the internal “tablet” of the posistor not working correctly.

If you are replacing an induction relay, make sure that it is positioned strictly vertically, like the previous one. Tilt or horizontal position will interfere with the operation of the movable core. After installing the housing, connect the wires. Here it is extremely important not to confuse the power and ground wires.

Secure the relay with a metal bracket or plastic latches. Make sure that the part fits tightly and does not loosen when the compressor vibrates. After this, you can temporarily turn on the refrigerator without screwing the back cover to listen to the start. The motor should start running smoothly, without a hum or subsequent click.

⚠️ Attention: If, after replacing the relay, the compressor hums but does not start, immediately unplug the refrigerator! Long-term operation in this mode (“locked rotor” mode) leads to rapid overheating and combustion of the motor windings.

Frequently asked questions (FAQ)

Is it possible to repair an old relay, or is it necessary to buy new?

Repair of a starting relay, especially a posistor relay, is not economically feasible and technically difficult. A posistor is a disposable element that changes its properties when heated. It is impossible to restore them. Sometimes they try to clean induction relays from carbon deposits, but this only gives a temporary effect, since the calibration of the spring and core is lost. It is safer and more reliable to buy a new part.

Why does a new relay burn out a few days after installation?

If a new relay fails quickly, it is most likely not the reason. The main culprits: a faulty compressor (turn-to-turn short circuit), problems with the network voltage, or incorrect selection of relay power. Also, frequent switching on and off of the refrigerator (for example, with poor contact in the thermostat) shortens the life of the starting device.

Where can you find the Pozis refrigerator model marking?

The technical data sheet or nameplate with the model is usually located inside the refrigerator compartment on the side wall or on the back wall inside. The model may also be indicated in the operating instructions. Knowing the exact model (for example RD-145-7) simplifies the search for compatible spare parts in catalogs.

Does the price of the relay differ greatly for different Pozis models?

The cost of starting relays for household refrigerators, as a rule, is low and does not greatly depend on the model. The difference may be in the type (induction is cheaper than posistor) and manufacturer (original versus analogue). On average, the price varies within an affordable range, making repairs economically justified.

Is it dangerous to leave the refrigerator running without the back cover?

Short-term operation for testing is acceptable. However, it is not recommended to operate the refrigerator without the back panel (for a long time). This prevents proper air circulation around the compressor and condenser, leading to overheating and increased energy consumption. In addition, open wiring is a risk of dust and moisture getting in.