A sudden extraneous sound in the operation of household appliances often becomes a cause for concern, especially when it comes to such an important unit as Atlant refrigerator. Characteristic clicks can occur at different intervals: immediately after being plugged in, when the motor stops, or even during the active cooling phase. Owners of models with No Frost and a classic defrosting system encounter this problem regularly, trying to understand whether the sound is a sign of a breakdown or normal operation of the mechanisms.
You should not ignore repeated knocking noises, as they can signal a failure of the start-up relay, deformation of the case or problems with the compressor. Timely diagnosis allows you to determine the source of noise and prevent more serious damage that requires expensive intervention. In this article, we will analyze in detail the mechanics of the occurrence of sounds, methods of self-checking and situations when calling a technician is inevitable.
Natural sounds and normal operation of automation
Before sounding the alarm and searching malfunction, it is necessary to exclude normal work processes. Modern refrigerators, including the popular series Atlant XM 4008 or XM 6025, are equipped with complex automation that controls on and off cycles. When voltage is applied to the motor windings or, conversely, when it is turned off, the contacts inside the starting relay open or close, which is physically accompanied by a loud click.
Also the source of sound can be a thermostat or an electronic control module. When the temperature inside the chambers reaches a set value, the sensor sends a signal to turn off the compressor, which is also accompanied by a characteristic sound. If the click is heard once when starting and once when stopping, and the unit itself cools properly, then most likely everything is in order with your equipment.
⚠️ Attention: If the clicks are heard frequently and chaotically, and the refrigerator does not cool or cools poorly, this is a sign that the compressor is trying to start, but cannot. Long-term operation in this mode can lead to burnout of the motor windings.
It is important to listen to the nature of the sound. A loud, metallic click usually indicates electrical contacts are working. A dull knock may indicate vibration of internal elements or that refrigerant sharply changes its state in the tubes. Understanding the nature of the sound is the first step to correct diagnosis.
Faults in the starting relay and thermostat
One of the most common reasons why Atlant refrigerator clicks does not turn on is the failure of the starting relay. This small unit is responsible for starting the compressor engine. Inside it there is a coil and a movable core, which, when current is applied, is retracted, closing the starting winding. If the mechanism jams or the contacts burn out, you hear a series of quick clicks, after which the motor either starts with difficulty, or hums and is turned off by the protection.
In models with mechanical control, the thermostat is responsible for the frequency of switching on. When its internal bimetallic plate wears out, the contacts may begin to “spark” or stick, producing a cracking sound. In electronic models Atlant the control board is responsible for these processes, but clicks of the actuators (relays on the board) are also audible.
How to check the relay without disassembling?
Carefully, without removing the casing, place your hand on the back wall of the refrigerator in the area compressor when clicking. If you feel a strong vibration of the relay body at the moment of sound, but the compressor is silent, the problem is in the starter.
To replace the relay, you do not always need to call a technician if you have basic electrical skills. However, an incorrectly selected relay (they come in different types: RT, R-1, R-3, etc.) may not fit a specific engine or quickly fail.
☑️ Diagnostics of the starting relay
Compressor problems and water hammer
The most alarming symptom is when compressor it makes a loud clanging or knocking sound when trying to start. This may indicate that the engine piston group has reached the end of its life or mechanical damage. In this case, the engine hums, clicks (thermal protection is triggered) and turns off without starting.
Another reason for knocking is the so-called “hydraulic hammer”. This happens if liquid freon along with oil enters the compressor cylinder at the moment when the valve tries to close. Liquid, unlike gas, is not compressed, which leads to a hard impact of the piston on the valve group. This often happens after improper transportation of the refrigerator or when the defrost system malfunctions, when condensate enters the system.
| Sound type | Probable cause | Danger to equipment | Required actions |
|---|---|---|---|
| Single click at start/stop | Relay or thermostat operation | Absent | Observation |
| Series of frequent clicks, no cold | Starting relay malfunction | High (motor combustion) | Replacing the relay |
| Loud clanging, buzzing, shutdown | Compressor wedge or hydraulic blow | Critical | Call a technician |
| Crack inside the chamber | Thermal expansion of plastic | Absent | Ignore |
If you observe the symptoms described in the second or third line of the table, further operation of the refrigerator is strictly prohibitedas this can lead to complete failure of an expensive component or even a wiring fire.
The influence of transportation and installation on noise
Users often forget that the correct location of the refrigerator Atlant directly affects the noise level. If the unit is not level, the compressor may vibrate more than usual, transferring vibration to the housing and causing internal parts to rattle or click together. Checking the horizontal installation is the first thing to do.
Transportation also plays a role. If the refrigerator was transported lying down without fixing the compressor or immediately after delivery it was plugged in, the oil might not return to the engine crankcase. As a result, when starting up, a shock of dry parts or the same hydraulic shock occurs. The instructions for most models Atlant recommend letting the equipment rest after transportation for 2 to 4 hours (and in winter - up to a day).
In addition, pay attention to the distance to the walls. If the refrigerator is placed close to furniture or a wall, the vibration of the motor can be transmitted to building structures, increasing the sound. The optimal distance to the back wall is at least 5-7 cm.
No Frost system and defrosting sounds
Owners of refrigerators Atlant with the system No Frost often hear clicks coming from inside the freezer or refrigerator compartment. These sounds are related to the operation of the automatic defrost system. The heating element (heating element) is periodically turned on, which melts the ice on the evaporator. The expansion and contraction of the plastic parts of the air duct and the evaporator itself when the temperature changes causes a cracking sound resembling clicks.
Also in such models there is a fan. If ice has frozen on the fan blades or dust has gotten into the bearing, it may make intermittent knocking noises as it rotates. This is easy to diagnose: the sound appears precisely when the fan is running (usually heard when you stand next to a running refrigerator).
⚠️ Attention: If clicking noises in the No Frost system are accompanied by a stop in air circulation or freezing of the back wall, the defrost timer or defrost sensor may be faulty. This requires professional diagnostics with a multimeter.
Sometimes an extraneous sound is produced by the cold air supply damper (damper). If the damper mechanism is stuck or frozen, it may make a knocking noise when trying to open or close. In models Atlant this is less common, but this factor should not be excluded.
Self-diagnosis algorithm
If you decide to diagnose yourself, proceed consistently. First, rule out external factors: check the stability of your feet, the absence of contact with furniture, the cleanliness of the condenser at the back (dust can cause overheating and noise). Then listen to where exactly the sound comes from - from below (compressor) or from inside the chambers.
Next is a check of the electrical part. To do this you will need a multimeter if you know how to use one. Testing the compressor windings and checking the resistance of the starting relay allows you to determine with high accuracy whether the motor is alive. If the relay rattles like a rattle when shaken, its core is destroyed and replacement is required.
It is also important to check the integrity of the power cord and socket. Poor contact in a plug or socket can cause sparking, which can also be heard as crackling or clicking noises. Try plugging the refrigerator into another outlet via an extension cord to eliminate this cause.
When you need to call a technician
Despite the possibility of self-diagnosis, there are situations when you cannot do without a specialist. If after replacing the start relay the situation does not change, or if the compressor hums but does not start, the problem is most likely internal to the motor. Opening the compressor at home is impossible and impractical - it is replaced entirely.
Also, the help of a professional is needed if there is a suspicion of a freon leak. If the refrigerator clicks, the motor runs, but there is no cold, and traces of oil or rust are visible on the tubes, the circuit has depressurized. To find the location of the leak, solder the pipes and refill the refrigerant, special equipment and a license are required.
How much does it cost to replace the starting relay in the service?
The cost consists of the price of the relay itself (usually from 500 to 1500 rubles depending on the model) and the cost of the technician's work (from 1000 to 2000 rubles). In total, the repair costs much less than replacing the compressor.
Is it possible to operate the refrigerator if it clicks?
For a short time, it is possible if it continues to freeze. But if the clicks are frequent and are accompanied by the motor turning off, prolonged operation will lead to overheating of the windings and the motor wedge. It is better to de-energize the appliance before the technician arrives.
Why does the new Atlant refrigerator click?
The new equipment also makes sounds when the thermostat is operating, materials are expanding, and the compressor is starting for the first time. If the clicks are not accompanied by malfunctions, this is normal. Let the equipment work for 1-2 days to adapt.
Does a voltage surge affect the appearance of clicks?
Yes, low voltage in the network may prevent the compressor from starting the first time, causing multiple startup attempts (relay clicks). In such cases, it is recommended to use a voltage stabilizer.
How often do you need to change the starting relay?
The starting relay is a consumable item, but it lasts a long time, usually 5-10 years or more. Frequent replacement is required only if the voltage in the network is unstable or a specific batch of parts is defective.