A sudden stop of the compressor or a characteristic hum without starting the motor in the refrigerator Stinol often indicates a failure of the start relay. This small but critical component is responsible for supplying a starting impulse to the motor winding, allowing it to gain the necessary speed. If you notice that the unit turns on for a few seconds, makes a clicking sound and turns off, then with a high degree of probability the problem lies in this component.
Independently replacing the relay is a very real task for a home craftsman, which does not require expensive special tools. However, before starting work, it is important to understand that electrical safety is priority number one. In this article, we will analyze in detail the diagnostic process, selecting a compatible spare part and the installation procedure so that your refrigerator Stinol-101, Stinol-103 or any other model works like new again.
Ignoring the symptoms of a faulty relay can lead to more serious consequences, including overheating and combustion of the compressor itself, the replacement of which costs a lot more expensive. Therefore, upon discovering the first signs of unstable operation, it is better to immediately check the condition of the starting device. Below we will look at how to correctly identify the breakdown and fix it.
Diagnostics of a faulty start relay
Before disassembling the refrigerator, you need to make sure that the problem is really in the relay, and not in the thermostat or the compressor itself. The main sign of a malfunction is a characteristic sound: you hear the refrigerator trying to start, a loud click is heard, followed by silence. After some time, the cycle repeats. This means that the trigger mechanism is triggered, but cannot hold the circuit or start the motor.
For an accurate diagnosis, you will need a multimeter. You will need to test the relay contacts for opens or short circuits. In good condition, the resistance between certain contacts should be close to zero, and in other combinations - infinite. If the device shows a resistance of hundreds of ohms where there should be a circuit, or vice versa - it rings where there should be a break, the part requires replacement.
⚠️ Attention: Before any diagnostics of electrical components, be sure to disconnect the refrigerator from the network. Even briefly touching live parts can cause serious injury.
It is also worth visually inspecting the part. If traces of soot, melted plastic, or a burning smell are visible on the relay body, then doubts disappear - the device has burned out. Sometimes you can hear a rattling sound inside the case if the inductor has fallen, which also indicates the need for replacement. Stinol if traces of soot, melted plastic are visible, or a burning smell is felt, then doubts disappear - the device has burned out. Sometimes you can hear a rattling sound inside the case if the inductor has fallen, which also indicates the need for replacement.
Types of relays and selection of spare parts for Stinol
Refrigerators of the brand Stinol were equipped with various types of starting devices depending on the year of manufacture and model of the compressor. The most common are induction (electromagnetic) relays of the RT series and posistor (thermal) relays. Induction ones work by creating a magnetic field that draws in the core and closes the contacts, while posistor ones use the property of the material to sharply increase resistance when heated.
When choosing a new spare part, it is critical to pay attention to the markings of the old device. Often codes are stamped on the case, such as RTK-1, R-3 or foreign analogues from Danfoss, Secop. There are no universal solutions: if you install a relay with an inappropriate response current, the compressor either will not start or will operate in emergency mode, quickly wearing out.
Modern analogues may differ in appearance from the original Soviet or early imported parts. The main thing is the correspondence of the electrical characteristics and the mounting geometry. If you cannot find an exact analogue, you can use universal kits, but they require careful configuration and testing.
Necessary tools and preparation for repair
Replacing the relay with refrigerator Stinol does not require complex equipment. You will need a standard DIY kit. The main time will be taken not by the replacement process itself, but by access to the unit and its preparation. Make sure that you have enough free space around the refrigerator for comfortable work.
List of necessary tools:
- 🔧 Screwdriver (Phillips and flat) - for removing protective panels and clamps.
- 🔌 Pliers or pliers - for working with terminals and wires.
- 🧹 A brush with stiff bristles - for cleaning contacts from oxides and dust.
- 📱 Smartphone with a camera - to photograph the connection diagram before disassembly.
It is important to prepare the workplace. Cover the floor with cardboard or cloth, since when dismantling the compressor group, oil may drip or small parts may fall. Also make sure that you have good lighting, since the compressor niche is often dark, and the markings on the relay are small.
☑️ Preparation for repair
Step-by-step instructions for replacing the relay
The replacement process begins with dismantling the protective casing at the bottom rear of the refrigerator. It is usually secured with several screws or latches. After removing the cover, you will see a compressor (black barrel) and a box attached to it - this is the start relay. On models Stinol it is often closed with an additional plastic cap.
Carefully remove the clamps or bend the metal brackets holding the relay to the compressor terminals. Do not use excessive force to avoid damaging the copper tubes or wires. Disconnect the block with wires. As mentioned earlier, taking a photo before the disconnect will help you avoid mixing up the wires during reassembly, especially if the color markings have faded.
Remove the old relay and install the new one. It should fit onto the three pins of the compressor with a characteristic click. Orientation matters: usually the marking UP or TOP should face up. Connect the wires according to your photo or diagram. Make sure the contacts are tight and not loose.
⚠️ Attention: Never leave the relay hanging on the wires when the refrigerator is on. This may result in a short circuit or electric shock if touched.
After installation, reassemble everything in the reverse order, but do not screw the back cover on completely yet. Plug in the refrigerator and listen. If the compressor starts up smoothly, without humming or repeated clicks, and after 10-15 minutes cold appears in the chamber, the repair was successful. You can fix the cover.
What to do if the compressor hums but does not start?
If after replacing the relay the situation has not changed, perhaps the problem is in the compressor itself (an interturn short circuit or wedge) or in the thermostat. Also check the integrity of the supply wires.
Compatibility and marking table
To simplify the search for spare parts, use the correspondence table. Please note that markings may differ depending on the component manufacturer (Ryazan plant, Danfoss, Pozitron etc.).
| Compressor type Stinol | Original relay marking | Analog (RT) | Analogue (Pozitron) | Operation current |
|---|---|---|---|---|
| Single-phase (old) | RTK-1 | RTK-1-3 | 112740 | 1.3 A |
| Single-phase (medium) | R-3 | RTK-3 | 113033 | 1.8 A |
| Single-phase (powerful) | R-4 | RTK-4 | 113053 | 2.3 A |
| Inverter (rarely) | Special. block | Not applicable | Not applicable | Depends on the model |
When purchasing, pay attention to the diameter of the rod and the location of the contacts. Even if the electrical parameters match, physical incompatibility may prevent the part from being installed. In such cases, some craftsmen carefully resolder the contacts or use adapter blocks, but this requires high qualifications.
Common mistakes and safety measures
One of the common mistakes is trying to clean the contacts of the old relay with sandpaper and it. In refrigerator conditions Stinol this is a temporary measure, which often leads to repeated breakdown after a few days. Microscopic irregularities on the contacts cause sparking, which again melts the metal. It is cheaper and more reliable to immediately buy a new part.
Also, users often confuse the starting relay with a thermal protection relay. In some designs they are combined into one block, in others they are separated. The thermal relay protects the motor from overheating and opens the circuit at critical temperatures. If you replace only the starting part and the protection burns out, the refrigerator will still not work correctly.
Do not forget about grounding. When assembling, make sure that the compressor housing and the metal casing of the refrigerator have reliable contact with the ground wire (yellow-green wire in the plug or on the housing). This will protect you from electric shock in the event of an insulation breakdown.
⚠️ Attention: If, after replacing the relay and turning on the refrigerator, you smell burning wiring or see sparking, immediately unplug the plug from the socket. This is a signal about an incorrect connection or a malfunction of the compressor.
Following these simple rules will allow you to extend the life of your refrigerator Stinol and avoid expensive repairs at a service center. Remember that accuracy and attentiveness when working with electricity is the key to a successful result.
Questions and answers (FAQ)
Is it possible to install a relay from another refrigerator, for example, Atlant or Indesit?
Yes, this is possible if the electrical parameters (operation current) and the geometric dimensions of the landings match pins. However, it is better to look for original analogues or specialized replacements for Stinol, since the layout of the blocks may differ.
Why does a new relay immediately burn out after installation?
Most often this indicates a malfunction of the compressor itself. If the motor is “jammed” or its winding is broken, the starting currents become prohibitive, and the relay burns out trying to start the unit. Also, the cause may be incorrect phasing or a short circuit in the wiring.
How much does it cost to replace a relay in a service compared to self-repair?
Independent repair will cost you only the cost of the part (usually from 300 to 800 rubles). At the service center, the cost of calling a technician and work will be added to the cost of the spare part, which can increase the amount by 3-5 times.
Is it necessary to defrost the refrigerator before replacing the relay?
Complete defrosting is not necessary, since the relay is located at the bottom of the unit, in the dry compartment of the compressor. However, if the refrigerator is severely frozen or you plan to tilt it for access, it is better to defrost the chambers first to avoid water getting on the electrics.