The situation when your Atlant refrigerator makes a characteristic click, tries to start, but immediately becomes silent and goes out, is a classic sign of a serious technical malfunction. This behavior of the unit means that the protection system is activated instantly, preventing deeper damage to expensive equipment. Owners often describe this as “the engine hums for 3-5 seconds and turns off,” which indicates the impossibility of the engine reaching operating mode.
Ignoring this problem can lead to a complete replacement of the compressor, since constant attempts to start followed by a sudden shutdown cause overheating of the windings and oil degradation. Cyclic startup and stopping is not just an inconvenience, but an SOS signal from the electronics or mechanics of your refrigerator. Understanding the nature of this sound and shutdown timings will help you save time and money when calling a technician or doing your own repairs.
In this article we will analyze in detail the main components responsible for stable operation and methods for checking them. We will look at electrical circuits, mechanical interlocks and operating features start relay. It is important to approach diagnostics systematically, excluding simple causes before disassembling complex components.
Problems with power supply and mains voltage
Before opening the technical compartment and sinning with complex electronics, you need to make sure the quality of the incoming energy. Brand refrigerators Atlant, especially models with inverter compressors or electronic control, are extremely sensitive to voltage drops. If your network experiences surges below 190 Volts or above 250 Volts, the control unit can forcibly stop the operation of the unit for safety.
A common mistake is connecting powerful refrigeration equipment to low-quality extension cords or tees that have been used for many years. Contact group in such devices it may have oxidized or weakened, which creates additional resistance and voltage drop in moment of inrush current. Check to see if the plug or socket gets hot after trying to turn it on.
⚠️ Attention: If you live in a private house or area with unstable power supply, using a voltage stabilizer is a must to extend the life of the compressor.
It is also worth checking integrity of the power cord of the refrigerator itself. Visually it may look intact, but the internal wires may have broken at the base of the plug or the entrance to the housing. At the slightest movement of the cord, the contact may disappear, causing the “turns on and immediately turns off” effect. Try to gently move the wire at different points when the device is plugged in (observing safety precautions).
Malfunction of the start relay and thermal relay
The most likely reason why the refrigerator Atlant clicks and turns off after a few seconds lies in the compressor start relay. This small unit is responsible for sending an impulse to the starting winding of the motor to spin the shaft. If the relay contacts are burnt or stuck, or the inductor coil is faulty, the engine does not receive the required starting torque.
In models with a posistor starter, the problem often lies in the thermistor itself. Over time, its characteristics change, and it stops passing the current of the required strength at the right time. The compressor tries, the current increases sharply, and the thermal protection (thermal protection) opens the circuit, making that same click. After cooling, the protection closes again and the cycle repeats.
- 🔌 Visual inspection: Remove the relay and inspect the contacts for carbon deposits, plastic melting or oxidation.
- 🔊 Sound diagnostics: Shake the relay near your ear - if you hear the sound of a broken element inside, the part requires replacement.
- 📏 Checking resistance: Use a multimeter to test the relay windings; lack of resistance or a short circuit will indicate a malfunction.
Replacing the start relay is one of the simplest operations in repairing refrigerators. However, it is important to choose an analogue with identical characteristics, since universal relays are not suitable for all models compressors. An incorrectly selected relay may not disconnect the starting winding after starting, which will lead to engine combustion.
Compressor wedge and mechanical damage
If the electrical part is working properly, but the refrigerator still turns on, hums and immediately turns off, there is a high probability of mechanical jamming of the compressor. This happens when the piston group wears out, metal particles get into the gaps or the oil loses its properties and turns into a thick substance. The motor is physically unable to turn the shaft, the current in the windings increases to the maximum, and the protection emergency turns off the power.
Sometimes the compressor does not jam tightly, but “at a dead point.” In this case, the so-called “knock method” or applying increased voltage for a short time can help, but these methods are temporary and risky. Stuck compressor often produces a metallic clang or dull hum before turning off. If you hear such sounds, the chances of successful repair without replacing the unit are minimal.
| Symptom | Probable cause | Sound character | Actions |
|---|---|---|---|
| Click after 1-2 seconds | Faulty start relay | Quiet click, no buzz | Replace relay |
| Buzz 5-10 sec | Compressor jamming | Strained hum turning into a click | Checking the oil, replacing the motor |
| Quiet humming | Break winding | Barely audible hum, no click | Replacing the compressor |
| Cyclic clicks | Wiring problems | Series of quick clicks | Searching for a break circuits |
It is important to note that operating the compressor in the “on-off” mode quickly leads to its final failure. The thermal relay may not have time to cool down, and as a result the stator windings will burn out. Therefore, if a mechanical problem is suspected, operation of the unit should be stopped.
Is it possible to start a jammed compressor?
There is a starting method through a capacitor or using a special device (jack for compressors) that supplies high voltage to the starting winding. However, this gives only a temporary effect - from several days to a couple of months, after which the compressor will still require replacement.
Malfunctions of the thermostat and sensors
Although most often the problem “turns on and immediately turns off” is associated with the motor, a malfunction of the temperature controls cannot be ruled out. If thermostat (the thermostat) fails and closes the contacts incorrectly, it can give a start command, but immediately, due to an internal defect or poor contact, break the circuit. In Atlant refrigerators with electronic control, this is controlled by a temperature sensor, the signal from which is processed by the control module.
In models with the No Frost system, the situation is complicated by the presence of many sensors (defrost, evaporator, refrigerator compartment). If one of them gives incorrect readings, for example, reports critical overheating or, conversely, instantaneous achievement of the set temperature, the controller can block the start of the compressor or interrupt its operation.
Diagnostics of a mechanical type thermostat is simple: short-circuit the two wires going to it directly. If the refrigerator starts and works normally, then the problem is in the thermostat. For electronic systems, you will also need multimeter checking the resistance of the sensors at different temperatures, checking the resistance table for a specific model.
Problems with interwinding short circuit
One of the most unpleasant reasons why the Atlant refrigerator turns on for a couple of seconds and turns off is an interwinding short circuit in the compressor motor. This is a condition when the insulation between the turns of the copper stator winding is broken. As a result, a short circuit occurs, the current increases instantly, and thermal protection turns off the unit.
An interwinding short circuit can be distinguished from other faults by the characteristic smell of burnt insulation, which may appear in the compressor area after several attempts to start. Also, when testing the windings with a multimeter, the resistances will differ from the nominal values or tend to zero. Breakdown to the housing is another malfunction option, which also causes instantaneous operation of the protection.
Repairing a compressor with an interwinding short circuit at home is neither possible nor economically possible inappropriate. Rewinding the stator of a refrigeration compressor is a complex and expensive process. The only correct solution in this case is to completely replace the compressor unit with a new one.
⚠️ Attention: Operating a refrigerator with a broken winding can be dangerous, as voltage may appear on the housing. Be sure to check the refrigerator with an indicator screwdriver before touching metal parts.
Diagnostics and procedure
To effectively solve the problem, you must act sequentially, moving from simple to complex. You should not immediately disassemble the compressor if the problem may lie in the socket or cord. Competent diagnostics will help you avoid unnecessary costs and errors.
☑️ Refrigerator diagnostic plan
Start with a visual inspection and voltage check. Then proceed to listening to the operation of the unit. If the compressor hums but does not start, focus on the start relay and motor mechanics. If there is silence or quiet clicks, check the electrical circuits and thermostat.
When working on electrical components, always unplug the refrigerator. Even after switching off, the capacitors may retain a charge. Use an insulated tool and a rubber mat. If you are not confident in your abilities, it is better to turn to professionals, since working with refrigerant and high voltage requires qualifications.
Is it worth changing the compressor yourself?
Replacing a compressor requires a vacuum pump, a pressure gauge station, a burner and skills in soldering copper pipes, as well as knowledge about the types of freon and the amount of oil. Without experience, there is a high risk of damaging the new compressor or creating a fire hazard.
Frequently asked questions (FAQ)
Why does the Atlant refrigerator click but does not start?
Most likely, the start relay has failed or the compressor has jammed. The relay cannot give a start impulse, or the motor physically cannot turn over. Diagnostics with a multimeter is required.
Is it possible to repair a jammed compressor?
There are traditional methods of “wedging” (heating, shock, applying high voltage), but they give a temporary effect. The only reliable solution is to replace the compressor unit with a new one.
How much does it cost to replace the starting relay?
The relay itself is inexpensive (usually within a few hundred rubles), but if you call a specialist, the price of the work may exceed the cost of the part. You can replace it yourself if you have electrical skills.
Is it dangerous to leave a refrigerator on that constantly turns off?
Yes, it is dangerous. Constant inrush currents can melt wiring, cause a fire, or permanently kill the compressor. It is better to turn off the device until the cause is determined.