Sudden failure of the refrigerator Atlant always becomes an unpleasant surprise, especially when there are perishable products in the chamber. One of the most common reasons why the compressor stops starting or makes only a quiet click is the failure of the start protection relay. This small but critical unit is responsible for supplying a starting impulse to the motor windings and protecting against overloads. Understanding how this mechanism works will allow you to quickly diagnose the problem and restore the functionality of the equipment.
Independently replacing the start relay on a refrigerator Atlant is a task quite feasible even for a person without deep knowledge in electrical engineering, if you act carefully and consistently. You don't need a complex professional tool; a basic set of household tools is enough. The main thing is to observe safety precautions and strictly follow the algorithm of actions so as not to damage other components of the system.
In this article we will analyze in detail the process of diagnostics, selection of a new spare part and its installation. You will learn how to distinguish a burnt-out relay from a working one, which models are suitable for your unit and what to pay attention to during assembly. A correctly performed replacement will extend the life of the compressor and return the refrigerator to full operation.
Signs of a faulty start relay
The first signal that starting relay has failed is the characteristic behavior of the motor-compressor when trying to start. Instead of the usual steady hum, you may hear a short click followed by silence, or a loud cracking sound repeated at regular intervals. The compressor may try to start, twitch, but never reach operating speed, after which the thermal protection is triggered.
Another obvious symptom is the lack of cold in the chambers when the lighting is working and the thermostat is working. If you put your hand on the rear grille or side walls and they remain warm after sitting for a long time, this indicates that the refrigerant is not circulating through the system. In such cases, it is often the culprit starting device, which does not supply the required current to the starting winding.
⚠️ Attention: If after clicking the relay emits a burning smell or smoke is visible, immediately unplug the refrigerator. Operating a device with faulty electrics can lead to a short circuit or fire in the wiring.
Sometimes the malfunction does not manifest itself as a complete failure, but as unstable operation. The unit may turn on on the fifth or sixth attempt or operate with long periods of inactivity. This indicates that the contacts inside the relay have oxidized or melted, which increases resistance and disrupts the normal starting cycle. Ignoring these signs can lead to a more serious breakdown - combustion of the compressor itself, the replacement of which is not economically feasible.
Necessary tools and preparation
Before starting the repair, it is necessary to prepare the workplace and tools. Replacing a relay on a refrigerator Atlant requires access to the back of the unit, so clear some wall space. Make sure that the floor is dry and well lit so that you can clearly see the markings of the wires and the condition of the contacts.
To carry out the work you will need a minimum set of tools that can be found in every home. It is important that all tools are in good working order and that their handles are dry and clean. Using unsuitable objects may damage the plastic fasteners or terminals.
- 🔧 Phillips or flathead screwdriver (depending on the type of housing screws).
- 🔪 A utility knife or thin awl (for carefully removing terminals).
- 🧤 Dielectric gloves (for additional safety).
- 📱 Smartphone with a camera (for photographing the connection diagram).
- 🧹 Dry rags (to clean the contacts from dust).
A critically important stage of preparation is to completely disconnect the device from the power supply. It is not enough to simply turn off the refrigerator with a button; you must unplug the plug from the socket. During operation, you will touch live parts, and the presence of voltage is unacceptable. It is also recommended to let the unit stand unplugged for 10-15 minutes so that the residual charge in the capacitors has time to dissipate.
Removing the old relay
The process of removing the faulty part begins with dismantling the protective casing located at the bottom of the rear wall of the refrigerator Atlant. It is usually secured with latches or screws. Proceed with caution, as the plastic becomes brittle over time and can crack if handled repeatedly.
After removing the casing, the compressor will appear to your attention - a black metal “barrel”. In its lower part, on the side or bottom, there is a plastic box to which the wires fit. This is what we are looking for start relay. It can be secured to a retaining bracket or simply put on the compressor contacts.
Carefully remove the retaining bracket, if equipped. Then take the relay housing and gently rock it from side to side, remove it from the three pins of the compressor. Do not pull on the wires; apply force only to the plastic housing. If the relay is sitting tightly, you can slightly help yourself with a flat screwdriver by prying up the edge, but without fanaticism.
Now you need to disconnect the wires coming from the relay block to the general circuit of the refrigerator. They can be secured in a terminal block or simply twisted together. If connectors are used, they must be carefully removed. In some models Atlant the wires can be soldered, but this is rare; standard terminals are usually used.
☑️ Removing the relay
Diagnostics and selection of a new spare part
The removed relay must be inspected. Shake it near your ear: if something rattles inside, it means that the starting tablet or core has broken, and the part definitely needs to be replaced. Also pay attention to the condition of the plastic: melting, soot or cracks indicate overheating and short circuit.
There is always a marking on the relay body. For refrigerators Atlant the most common models are RTP, R-1, R-3, R-4, R-5, R-6, as well as more modern series. The number on the label often indicates compatibility with a certain compressor power. For example, relays P-1 and P-2 are suitable for low-power motors, and P-4 and P-5 are suitable for more powerful ones.
When purchasing a new part, be sure to check the markings. Installing an unsuitable relay can result in the compressor humming but not starting, or, conversely, the starting winding will not turn off, which will quickly damage the motor. If you cannot find an exact analogue, you can use a universal relay, but you will need to select the current.
| Relay marking | Compressor type | Features | Compatibility |
|---|---|---|---|
| RTP-1, RTP-2 | Single-phase | Old model | Low-power models |
| R-1, R-2 | Single-phase | Vertical mounting | Refrigerators up to 200 l |
| P-3, P-4 | Single-phase | Horizontal mounting | Average power |
| P-5, P-6 | Single-phase | Reinforced | Two-compressor models |
⚠️ Attention: Do not try to repair the inside of the relay (clean the contacts, glue the tablet). This device is inexpensive, and the quality of repairs in handicraft conditions does not guarantee safe and durable operation.
Installation of a new relay and assembly
Installation of a new start relay is carried out in the reverse order of dismantling. First of all, connect the wires to the terminals of the new device, strictly following the photograph taken earlier. Reversed polarity or connection to the wrong contacts can instantly burn out the new part.
Place the relay housing onto the three pins of the compressor. It should fit tightly and without distortion. The orientation of the relay matters: there is often an arrow or inscription on the body UPthat should face up. An incorrect position may disrupt the operation of the thermal protection or switching mechanics.
Secure the relay with a metal clamp, if provided by the design. Make sure that the wires do not touch the hot compressor tubes or are pinched by the sharp edges of the casing. After this, install the protective plastic casing in place and secure it with screws or latches.
What to do if the relay does not fit in size?
If the purchased relay is slightly different in the shape of the seat, but the electrical parameters are the same, you can carefully file down the plastic protrusions inside the seat or use an adapter block if it was included. The main thing is to ensure tight contact with the pins of the compressor.
Only after complete mechanical assembly can the refrigerator be turned on to the network. Listen to the startup sound: it should be confident, without prolonged buzzing or crackling. After 10-15 minutes, check whether the condenser (grid at the back) has begun to heat up - this is a sign of the start of refrigerant circulation.
Frequent errors during replacement
Even a simple operation can go wrong if you make typical beginner mistakes. One of the most common is ignoring contact cleaning. If you place a new relay on oxidized compressor terminals, the resistance at the contact point will be high, which will lead to heating and repeated failure.
Another mistake is using a relay with the wrong tripping current. In pursuit of cheapness or availability, users use what is available. This leads to the fact that the thermal protection either operates too early, preventing the motor from starting, or too late, allowing the windings to burn out.
- ❌ Attempting to remove the relay by yanking the wires (broken terminals).
- ❌ Installing the part in an upside-down position.
- ❌ Turning on the device without a protective casing (risk of electric shock or moisture).
- ❌ Ignoring checking the voltage in the network (at low voltage the relay may click frequently).
It is also worth mentioning the rush. Many people begin to disassemble the unit without waiting for the power to be completely turned off or without preparing the lighting. This increases the risk of injury and error. Refrigerator repair Atlant does not tolerate fuss; it is better to spend an extra 10 minutes on preparation than to redo the work.
Questions and answers
Is it possible to start a refrigerator without a starting relay?
Theoretically, you can start the motor by applying voltage directly to the starting winding, but this is absolutely impossible to do in a domestic environment. Without a relay, the compressor will not be able to switch to operating mode; it will quickly overheat and burn out. In addition, this is life-threatening.
Why does the new relay click, but the refrigerator does not turn on?
There may be several reasons: the compressor itself is faulty (an interturn short circuit or wedge), a problem with the wiring, low voltage in the network, or the relay is incorrectly selected (does not match the current). It is also possible that the relay is defective.
Where can I find the relay markings on the Atlant refrigerator?
The markings are applied to the plastic body of the relay itself. To see it, you need to remove the rear casing of the refrigerator and remove the plastic box from the side or bottom of the compressor.
How often do you need to change the starting relay?
The service life of the relay is not strictly regulated, but on average they last 5-10 years. Frequent power surges in the network can shorten this period. Scheduled replacement is not required, they are changed only when.