Refrigerator owners Stinol We often encounter a situation where the compressor stops starting or operates with a characteristic click. In most cases, the cause of the malfunction is the failure of the start-up relay. This small but critical element is responsible for starting the engine and protecting it from overloads. Understanding what the relay looks like and where exactly it is located in your refrigerator is the first step to a successful repair.
Brand refrigerators Stinol were manufactured using different types of compressors, which affects the appearance and design of the starting device. Some models are equipped with classic induction relays, others with more modern posistor elements. Visual identification of a part allows you to select the correct replacement and avoid diagnostic errors. In this article we will analyze in detail the design, appearance and features of the location of the relay in different modifications of equipment.
You should not ignore signs of malfunction, since operating a compressor without proper protection can lead to its complete combustion. Start-protective relay is a consumable material, the resource of which is limited by the number of switching cycles. If you notice that the refrigerator is humming but not cooling, or the motor is trying to start and immediately stalls, you need to conduct a visual inspection and check the contacts. Knowing what a working and faulty part looks like will save you time and money on calling a technician.
Appearance and design features of the relay
Refrigerator start relay Stinol is a compact block, usually black or dark gray, made of heat-resistant plastic. The shape of the housing may vary depending on the compressor manufacturer (for example Danfoss, Atlant or Aspera), but the general design principle remains similar. On top there is often a test button or marking with technical characteristics, such as operating voltage and type of refrigerant.
Inside the plastic case there is an electrical circuit hidden, including a coil, a movable core or posistor, as well as a bimetallic thermal release plate. Thermal relay responsible for breaking the circuit when the motor windings overheat, preventing fire hazards. The starting group, in turn, briefly supplies current to the starting winding of the compressor, providing the necessary torque for starting.
- 🔌 Contact group: three main terminals for connecting to the compressor and the power supply.
- ⚙️ Mechanical core: movable element in induction relays that responds to current.
- 🛡️ Bimetal plate: key element of overheating protection.
It is important to note that in different models Stinol relays with different numbers of contacts can be used. Some modifications have additional leads for connecting a fan or temperature sensor, but the main function of the starting unit remains unchanged. When inspecting the part, pay attention to the condition of the contacts: the presence of soot, oxides or melting indicates the need for replacement.
⚠️ Attention: The plastic housing of the relay must not have cracks or traces of melting. If you see blackened plastic or smell a burning smell, operating such a device is strictly prohibited.
Location of the relay in various Stinol models
To find the relay, you need to gain access to the bottom of the refrigeration unit. In most models Stinol, such as the 101, 102, 103 and 104series, the compressor is located in a niche on the rear wall of the case. The relay is always attached directly to the compressor terminals, covered with a metal or plastic casing to protect it from dust and moisture.
The search process begins by removing the rear protective panel at the bottom of the refrigerator. Often the panel is secured with latches or a few screws. After removing the cover, you will see the compressor - a black metal “barrel”. On its side or back, where three copper tubes and electrical wires exit, the desired device will be installed.
In some modifications with two compressors (for separate chambers of the refrigerator and freezer), relays will be installed on each engine. The principle of their location is identical: they are always in close proximity to the contact group of the motor. Connection diagram may differ, so before disconnecting the wires it is recommended to take a photograph of the original position.
If access to the compressor is difficult due to the design of the niche, you may need to move the refrigerator away from the wall. Make sure that the equipment is disconnected from the power supply before starting any manipulations. Safety when working with electrical appliances is priority number one.
Types of starting relays: inductive and posistor
B refrigerators Stinol you can find two main types of starting devices, which are fundamentally different in principle of operation and appearance. Understanding these differences is necessary for correct diagnosis and selection of spare parts. The wrong type of relay can result in the compressor either not starting or burning out.
The first type is induction relay. It has a more complex mechanical design with a movable core inside the coil. When voltage is applied, the core retracts, closing the starting contacts. Such relays often make a characteristic clicking sound when turned on and off. They are considered more reliable, but are sensitive to the installation position (they must stand strictly vertically).
The second type is posistor relay. This device has no moving mechanical parts. Inside it there is a ceramic element (posistor), which, when heated by current, sharply increases its resistance, opening the starting winding circuit. Such relays are more compact, cheaper and less sensitive to vibrations, but have a limited service life of switching cycles.
| Characteristics | Inductive relay | posistor relay |
|---|---|---|
| Principle of operation | Electromagnetic | Thermal (posistor) |
| Moving parts | Yes (core) | No |
| Operation sound | Loud click | Quiet or no sound |
| Installation requirements | Strictly vertical | Any position |
You can determine the type of relay by the markings on the body or by appearance. Induction models often have a more elongated shape and a visible coil when disassembled. PTCs look like a monolithic block. If you are planning a replacement, it is best to purchase an original spare part or a high-quality analogue with identical characteristics.
Can you change the types of relays?
In some cases, an inductive relay can be replaced with a posistor relay and vice versa, but this requires changing the connection diagram and selecting an element with a suitable resistance. Without special knowledge, it is better not to take risks and install what was originally there.
Diagnostics and signs of malfunction
Before buying a new part, you need to make sure that the problem lies in the relay. Symptoms of a malfunction may be similar to a breakdown of the compressor or thermostat itself. Primary diagnosis is carried out visually and auditorily. If, when you turn on the refrigerator, you hear a click, followed by a hum, and then another click and silence, this is a classic sign that the protection has tripped.
For a more accurate check of the relay, you need to remove it from the compressor. Unplug the refrigerator, remove the casing and carefully disconnect the wires. Pay attention to the integrity of the contacts inside the relay connector. Oxidation or burning of the contacts may prevent the normal flow of current. Also check the condition of the bimetallic plate - it should not be deformed.
- 🔍 Visual inspection: search for cracks, soot, melting.
- 🔊 Audio diagnostics: listening for clicks when rocking (in induction).
- 📏 Checking: checking circuit integrity with a multimeter.
If the relay looks intact outwardly, you can try to “blow out” it or gently knock on the body. In induction models, the core may become stuck due to contamination or corrosion. However, if after cleaning and reinstalling the problem persists, most likely the part requires replacement. Diagnostics with a multimeter will show the presence or absence of conductivity between the contacts.
Instructions for replacing the relay with your own hands
Replacing the start-up relay in the refrigerator Stinol is a procedure that is accessible even to a beginner, subject to safety precautions. The main rule: all work is carried out only with the power supply completely disconnected from the network. Do not neglect this rule, as the risk of electric shock in combination with moisture and metal is very high.
First remove the back panel at the bottom of the refrigerator. Locate the compressor and the relay located on it. Carefully remove the retaining bracket or strip that holds the relay housing to the compressor terminals. Then disconnect the connector with wires. Usually it can be removed with a simple hand effort, but if the contacts have oxidized, a slight rocking may be required.
☑️ Preparing to replace the relay
Install the new relay in the reverse order. Make sure that it fits onto the compressor terminals tightly and all the way. Contact should match perfectly. Attach the retaining bar and connect the electrical connector. After assembly, do not rush to close the panel - turn on the refrigerator and listen. If the compressor starts smoothly and operates without any extraneous sounds, the repair can be considered successful.
⚠️ Attention: If after replacing the relay the compressor hums but does not start within 3-5 seconds, immediately turn off the refrigerator. This may indicate a malfunction of the compressor itself or incorrect installation of the relay.
Frequent errors during replacement and operation
One of the most common mistakes is installing a relay of the wrong type or with incorrect current parameters. Each compressor requires a certain starting current, and using a “universal” relay without checking the characteristics can lead to rapid failure of the new element or the motor itself. Always check the markings on the body of the old and new parts.
Another mistake is ignoring the reason for the burnout of the previous relay. If the relay burns out, this is often a consequence of other problems: poor contact in the network, power surges or a malfunction of the thermostat, causing the compressor to work without stopping. Replacing the relay without eliminating the root cause will lead to a repeat of the situation in a short time.
Also, users often forget about cleanliness condenser (black radiator at the back of the refrigerator). A condenser clogged with dust causes the compressor to overheat, which causes the thermal relay to operate more often than expected. Regular cleaning of the back wall of the refrigerator extends the life of not only the relay, but also the entire unit.
In conclusion, it is worth noting that although replacing a relay is a simple procedure, it requires care and precision. If you are not confident in your abilities or see that the problem lies deeper (for example, in the wiring or the motor itself), it is better to turn to professionals. However, for many owners Stinol self-repair becomes an experience that allows them to save significant money.
Is it possible to repair an old relay rather than changing it?
Theoretically, an induction relay can be disassembled, the contacts and the moving core can be cleaned of carbon deposits. However, the service life of the bimetallic plate and springs is not restored after this. Repairs are temporary and do not guarantee reliability. PTC relays cannot be repaired.
How much does a relay for a Stinol refrigerator cost?
The cost of a start-up protection relay varies depending on the manufacturer and type. Original spare parts may cost more, but universal analogues (for example, manufactured Danfoss or Indesit) are often available at a price of 500 to 1500 rubles. The price does not include the cost of a technician’s services if you decide to call a specialist.
Why does the relay constantly burn out after replacement?
Frequent burning of the relay indicates a systemic problem. Possible reasons: unstable voltage in the network, a malfunction of the thermostat (the refrigerator does not turn off), a freon leak (the compressor is wearing out) or problems with the windings of the motor itself. Complex diagnostics are required.
How to determine that it is the relay that has burned out, and not the compressor?
If you hear a click from the relay when you turn it on, then a hum from the compressor and a second click (shutdown) after a few seconds, most likely the relay or compressor is jammed. If there is no click at all, the problem may be in the relay (break) or in the power circuit. An accurate answer will only be given by checking the compressor windings and checking the relay separately.