Refrigerators Atlant deservedly They are considered one of the most reliable units on the market, but even they are subject to wear and tear on electronic components. The most vulnerable part in the cooling system is the start-up relay, which is responsible for starting the compressor engine. If you notice that the refrigerator is humming but does not turn on, or hear characteristic clicks every few minutes, the problem most likely lies in this particular unit.
Many users immediately call a technician, fearing a complex repair procedure, but removing and replacing the relay is an operation that is accessible even to a beginner with a basic set of tools. Start-up protection relay is a compact device that is mounted directly on the motor housing. In this article, we will look in detail at how to safely dismantle the part, diagnose it and install a new one so that your refrigerator will work again.
Before taking active steps, you need to clearly understand the structure of the compressor group. The relay is placed on three contact pins extending from the motor housing and secured with a special bracket or latches. Incorrect handling of this unit can lead to damage to the pipes or the motor itself, so it is important to act consistently and without haste, strictly observing safety precautions.
Fault diagnosis and signs of failure
Before disassembling the equipment, you need to make sure that the problem really lies in the trigger mechanism. Users often confuse the failure of the relay with a breakdown of the compressor or thermostat itself. Symptoms Faults usually manifest themselves quite clearly: the refrigerator stops freezing, while the light inside may light up, and the unit itself makes intermittent sounds.
A characteristic symptom is cyclic turning the motor on and off. You may hear a loud click, then a buzzing sound that lasts 3-5 seconds, and then another click followed by silence. This indicates that starting winding receives a signal, but the engine does not start, and the thermal protection opens the circuit to prevent the windings from burning out.
It is also worth paying attention to external signs. If, after removing the back panel, you see a blackened relay or smell dry plastic, the diagnosis is obvious. In some cases, the part may look intact, but inside there is already a break in the contacts or the inductor has burned out. For an accurate check, it is better to use a multimeter, testing the circuit for resistance.
⚠️ Attention: If after clicking the relay the compressor hums, but does not start, and the motor housing gets very hot, immediately unplug the refrigerator. Long-term operation in this mode can lead to a wedge of the piston group.
It is also important to check the condition of the wiring going to the relay. A melted insulator or oxidized contacts can cause unstable operation of even a serviceable part. If you find traces of a short circuit on the wires, they must be cleaned or replaced before installing a new component.
Necessary tools and preparation of the workplace
To successfully complete the work of replacing the relay, you do not need a complex professional tool. A basic set that most home craftsmen can find is enough. The main requirement is that the tools must be in good working order and convenient for working in a limited space at the back wall of the refrigerator.
First of all, you will need a set of screwdrivers. Phillips screwdrivers are most often used to remove protective panels, but in some models Atlant there may be slotted screws or even special bolts with a Torx head. Also, a flat-head screwdriver with a thin tip would be useful for carefully snapping off the plastic clips.
To diagnose and clean the contacts, prepare a multimeter and fine sandpaper or a needle file. If you plan to replace a part, make sure that the new relay matches your compressor model exactly. The marking is usually applied to the body of the old part, and it cannot be ignored, since starting current parameters different motors may differ.
Organize good lighting of the work area. The back of the refrigerator is often dusty and dark, so a flashlight or portable lamp will be very helpful. Also prepare a container for collecting small screws and fasteners so that they do not get lost during the work.
☑️ Preparation for repair
Procedure for removing the compressor protective cover
The first step in the repair process is to gain access to the compressor compartment. A refrigerator Atlant usually has a metal or plastic panel at the lower rear that covers the motor and condenser grille. Before starting any work, it is absolutely necessary to unplug the power cord from the outlet.
Attaching the protective cover can be done in different ways. On older models, these may be screws around the perimeter that need to be removed. In more modern versions, the panel is often held in place by clips or simply slid on top of the frame. Be careful not to break the plastic clips, which become brittle over time.
After removing the cover, you will see a black cylindrical compressor housing, next to which is a copper condenser tube and the relay unit itself. At this stage, it is important to inspect the overall picture: whether there are any visible damage to the tubes, oil leaks or broken wires.
If access to the relay is difficult due to a pile of wires or the proximity of other components, carefully move them to the side. Do not apply excessive force to the copper tubes, as their damage will lead to refrigerant leakage and will require expensive refilling from professionals.
Technology for removing the start-up relay
The process of removing the relay itself requires care and a steady hand. The device sits tightly on the compressor terminals, so you can’t just remove it. Depending on the model Atlant, the relay can be secured using a U-shaped metal bracket, a spring retainer or a screw.
If a bracket is used, it must be carefully pryed off with a flat screwdriver and removed. In some cases, the bracket is pressed with a screw, which must first be unscrewed. After releasing the fixing element, the relay must be carefully rocked from side to side, while simultaneously pulling it towards you.
Smooth loosening movements will help tear the part out of place without damaging the seats on the compressor. If the relay has an additional terminal block with wires, first disconnect it, remembering or photographing the connection order.
What to do if the relay cannot be removed?
If the relay is stuck, do not use brute force. Try warming the case slightly with a hairdryer (without overheating the plastic) or using a penetrating lubricant like WD-40 on the contact junction and waiting a few minutes. Sometimes gently turning the relay around its axis while pulling it lightly helps.
After the relay has been removed, inspect the mounting pins on the compressor. They must be clean and even. If they have carbon deposits on them, carefully sand them with fine sandpaper. Also check the inside of the removed relay: if traces of burning or melting are visible there, the part definitely requires replacement.
Comparative table of relay types for Atlant refrigerators
When choosing For a new part, it is important to focus on the technical characteristics. Refrigerators Atlant were equipped with different types of compressors (often Danfoss or Secop), therefore the relays may differ structurally and electrically.
| Relay type | Application | Design features | Mode of fastening |
|---|---|---|---|
| RT (Thermal) | Old models, single-phase motors | Has a bimetallic plate, works from heating | Put on pins, fixed with a bracket |
| ROM (Starting) | Modern models, inverter (rarely) | Uses an inductor to complete the circuit | Plastic case, latches |
| Combined | The most common in Atlant | Combines starting and thermal protection in one unit | Hard landing on 3 contacts + bracket |
| Electronic | New series with frequency regulation | Complex circuit with transistors, no moving parts | Terminal connection, requires adjustment |
When purchasing, pay attention to the markings. For example, the designation RTP-0 or R-3 indicates specific cutoff current parameters. Installing a relay with unsuitable characteristics can lead either to the fact that the motor will not start, or to its rapid combustion due to untimely shutdown of the protection.
If you are not sure of the choice, it is best to remove the old relay and bring it to the store or take a photo of the compressor nameplate. Consultants will help you choose the exact analogue. Universal relays exist, but their installation requires re-soldering the contacts and setting, which is not recommended to do without experience.
Installing a new relay and checking its functionality
The process of installing a new part is carried out in the reverse order. First make sure the new relay is clean and has no casting defects. Orient it strictly in the same way as the old one was installed: usually on the body there is a marking UP (top) or an arrow pointing upward.
Push the relay onto the three pins of the compressor until it stops. It should fit tightly, without any play. If a metal bracket is used, replace it in place and make sure it securely holds the chassis in place. Reconnect the wires to the terminals if they have been disconnected, following the color coding or previously made marks.
Before closing the protective panel, perform an initial test. Plug in the refrigerator. You should hear a power click, then the engine starts confidently. The hum should be smooth, without interruptions. Let the unit operate for 10-15 minutes, controlling the heating of the relay housing (it may warm up slightly, but should not be red-hot).
If the motor has started and is running stable, replace the protective cover and screw it on. During the first 24 hours, monitor the temperature in the refrigerator compartments. If the cold accumulates normally and the on/off cycles are normal (approximately 10-15 minutes of work and 20-30 minutes of rest), the repair can be considered successful.
Frequent replacement errors and precautions
Despite the apparent simplicity of the operation, beginners often make mistakes that can negate the entire repair or lead to new ones breakdowns One of the most common mistakes is ignoring contact cleaning. Installing a new relay on oxidized compressor pins will result in poor contact, sparking, and re-burning of the part.
Another common problem is incorrect relay orientation. Thermal relays operate on the basis of gravity and the heating of a bimetallic strip. If you turn such a relay upside down, it will not be able to properly open the circuit when overloaded, which is dangerous for the engine.
Also, do not neglect checking the capacitor if it is in the circuit. In some circuits, the starting capacitor helps the motor gain speed. If it is swollen or has lost capacity, the new relay may click, but startup will not occur.
⚠️ Attention: Never attempt to repair the relay case by gluing or insulating tape if the winding or contacts inside are burned out. This device is inexpensive and "refurbishment" does not guarantee safety or durability.
Remember that working with electrical appliances always carries risks. If you feel unsure of your abilities, notice a complex electrical circuit or smell ozone, it is better to stop and contact a professional technician. The safety of you and your home is more important than saving on calling a specialist.
Is it possible to install a relay from another refrigerator?
Theoretically, it is possible if the current characteristics and type (induction/thermal) match. However, the seats and location of contacts for different brands (Indesit, LG, Beko) often differ, which will require collective farming of fasteners and wires, which is unacceptable for safe operation.
Questions and answers (FAQ)
Is it possible to start an Atlant refrigerator without a relay?
Start briefly The motor can be closed by manually closing the contacts, but this is extremely dangerous and is not recommended. Without thermal protection, the compressor can burn out in a few minutes if it jams or overloads. This is a diagnostic method for experienced craftsmen, and not a method of operation.
Why does the new relay click, but the refrigerator does not freeze?
If the relay clicks, it means the electrical circuit is closed. If there is no cold, the compressor itself may be faulty (interturn short circuit, wedge), a freon leak has occurred, or the capillary tube is clogged. A more in-depth diagnosis of the system is required.
How often do you need to change the relay in the refrigerator?
The service life of the start-up relay is usually 10-15 years, but it greatly depends on the stability of the voltage in the network and the frequency of power surges. If the lights in your house flicker frequently, the relay may fail earlier.
Is it dangerous to change the relay yourself if the refrigerator is under warranty?
Yes, if you break the seals yourself or damage the wiring when replacing, you will lose the warranty. For devices under warranty, any repair work must be carried out only by an authorized service center.