The situation when the refrigerator Atlant begins to make unusually loud sounds, capable of unbalancing any owner. In the silence of a night apartment, a monotonous hum or sharp clicks are perceived as an alarm signal requiring immediate intervention. However, intense noise does not always indicate a serious breakdown that requires expensive repairs or replacement of the unit.
Many users mistakenly believe that a household appliance should operate absolutely silently, which is technically impossible for equipment with a compressor cooling system. Understanding the physics of the processes occurring inside the camera and engine compartment will allow you to independently assess the degree of risk. Often a simple adjustment of the housing position or defrosting is enough to restore silence.
In this article we will analyze in detail all the possible causes of acoustic discomfort. We will consider both normal operating modes and critical malfunctions that require the participation of a specialist. Competent diagnostics at an early stage will help avoid defrosting food and large financial costs.
Is it normal operating noise or a sign of a malfunction?
The first thing you need to do when you hear a hum is to determine the nature of the sound. Modern models Atlant, especially series with the system No Frost, are equipped with fans and complex air circulation systems, which inevitably create background noise. If the hum is uniform, quiet and does not cause vibration of walls or furniture, then most likely the equipment is operating normally.
However, there are sounds that cannot be ignored. Sharp metallic clangs, whistling, gurgling or intermittent, strained hum of the compressor often indicate a violation of the operating technology. It is important to distinguish the sound of a running motor from the sound of friction of parts or movement of refrigerant under high pressure.
Pay attention to cyclicity. Normal operation involves periods of engine on and off. If the unit hums continuously, without turning off for days, this is a direct sign that the system cannot reach the set temperature. In this case, the resources of the motor are worn out, which will ultimately lead to its combustion.
⚠️ Attention: If the smell of burning or melted wiring is added to the hum, immediately disconnect the device from the power supply. Operating faulty equipment in this condition can lead to a short circuit or fire.
For an initial assessment of the situation, you can use a simple test. Place your hand on the side walls of the case (capacitor). If they are warm or hot and the hum is loud, the system may be overloaded. If the walls are cold and the motor is humming, the thermostat could have failed and is preventing the compressor from stopping.
Installation errors and external factors
Often the cause of an obsessive buzzing sound lies not in internal parts, but in improper installation. The refrigerator Atlant, like any other equipment of this class, requires strictly horizontal installation. If the floor is uneven and the legs are not adjusted, the housing warps, which leads to an imbalance in the compressor operation and increased vibration.
The second common mistake is placing the device close to walls or furniture. To effectively cool the condenser (grids at the back or sides), a free flow of air is necessary. If the gap is less than 5-10 centimeters, the heat is not dissipated, the motor overheats and starts working harder, making louder sounds.
It is also worth checking whether the housing is touching other objects. Vibration transmitted to kitchen furniture or a nearby washing machine can create a resonating effect, increasing the noise many times over. Even a slight touch of hoses or wires on the back wall can cause rattling.
- 🛠️ Check the horizontal installation using a building level and adjust the front support legs.
- 📏 Provide a gap of at least 10 cm between the back wall of the refrigerator and the kitchen wall.
- 🚫 Make sure that there are no foreign objects resting on the compressor or tubes that increase vibration.
Sometimes humming occurs immediately after transportation. If the refrigerator was transported in a lying position or tilted strongly, the oil in the compressor takes time to drain into the crankcase. Turning on the appliance earlier than 4-8 hours after delivery can lead to dry operation and loud noise.
Problems with the compressor and starting relay
The compressor is the heart of the refrigerator Atlant, and it is the main source of sound. If the engine hums but does not start, or makes a strained, low-frequency hum, the problem may lie in the start relay. This small element is responsible for supplying the starting impulse. If it malfunctions, the engine tries to start, hums for a few seconds, then a click is heard and it goes silent.
Wear of the compressor itself also leads to increased noise. Over time, the engine shaft bearings wear out, play appears, and metal begins to rub against metal. This hum is accompanied by strong vibration of the body. In older models, the sound may be similar to a rumble, which intensifies as the engine warms up.
Another reason may be loose compressor mounts. The engine is mounted on springs or rubber shock absorbers that dampen vibration. If the springs are stretched and the rubber gaskets dry out or come off, the metal motor housing begins to hit the refrigerator frame.
To diagnose this group of faults, partial disassembly of the rear panel will be required. It is necessary to visually inspect the condition of the motor mount and the integrity of the electrical contacts. If you hear a loud click when starting, followed by a buzzing sound and a second shutdown click, this is almost guaranteed to be a burnt-out start relay or a jammed piston.
⚠️ Attention: Repairing the compressor and replacing the start relay requires electrical skills. Do not carry out diagnostics when the device is plugged in to avoid electric shock.
Is it possible to replace the compressor yourself?
Theoretically, yes, but in practice this is a complex procedure. It requires pumping out the freon, evacuating the system and charging with new refrigerant. Without special tools (rolling, pressure gauges, vacuum pump), a high-quality replacement is impossible.
Malfunctions of the No Frost system and fan
If your Atlant is equipped with an automatic defrosting system, the fan often becomes the source of noise. It is located in the freezer compartment (usually behind the back panel) and circulates cold air. Over time, ice builds up on the blades, the balancing is disrupted, and the fan begins to hum or crackle.
Another option is wear of the bearings of the fan itself. In this case, the sound will be constant while the motor is running, and will resemble a buzzing or whistling sound. Sometimes the blades can touch ice or the walls of the air duct if the geometry of their rotation is disrupted.
Problems with defrosting also cause noise. If the defrost heating element or timer is faulty, a huge lump of ice will form in the evaporator. The fan, trying to work, begins to noisily grind ice chips or simply rest against the ice shell. In such cases, the hum may appear or disappear depending on the operating cycle.
To eliminate the problem, it is often necessary to completely defrost the refrigerator within 24 hours. This will allow the ice to melt and free up space for the fan to operate. If after defrosting the noise returns after a couple of days, it means that the defrosting system is not working and requires repair.
Vibration of tubes and resonance of the housing
One of the most insidious causes of humming is resonance. The refrigerant pipes at the rear of the refrigerator may be too close to each other or to the cabinet. When the compressor operates, they vibrate and, when they come into contact, produce a metallic ringing or rattling sound.
Vibration can also be transmitted to the shelves inside the chambers. Glass shelves or plastic containers, if they do not fit tightly to the guides, begin to vibrate in time with the operation of the motor. This creates the effect of a “humming” refrigerator, although the unit itself is working properly.
To eliminate this defect, you need to carefully bend the condenser tubes from the back so that they do not touch each other and the housing. Inside the chambers, check the tightness of the shelves. Sometimes it is enough to place a small piece of foam rubber or rubber at the point of contact to remove the sound.
- 🔊 Inspect the back of the refrigerator with the motor running (carefully, without touching the hot parts).
- 👐 Try to lightly press the tubes or compressor casing with your hand - if the sound changes, the reason has been found.
- ❄️ Check whether bottles or dishes on the shelves are rattling, creating secondary noise.
Do not use excessive force when aligning them, so as not to break the tightness of the system. If you are not confident in your actions, it is better to leave this stage to the professionals.
☑️ Diagnosis of the noise source
Sound diagnostic table
For ease of classification of faults, we have compiled a summary table. It will help you quickly navigate the nature of the problem based on sound.
| Sound type | Probable cause | Degree of danger | Actions |
|---|---|---|---|
| Uniform quiet humming | Normal operation of the compressor | Safe | Do nothing |
| Loud hum that turns into a click | Starter fault relay | High (risk of motor burnout) | Replacement of relay |
| Metal knocking or clanging | Destruction of the compressor suspension | Medium (wear parts) | Replacing shock absorbers |
| Whistling or high-pitched noise | Problem with fan No Frost | Medium (risk of ice freezing) | Defrost, replacement fan |
| Gurgling, water overflow | Moving refrigerant | Safe (normal) | Do nothing |
When is it necessary to call a technician?
There are a number of situations when self-repair is not only ineffective, but also dangerous. If you have excluded all external factors (installation, resonance, ice), and the refrigerator Atlant continues to hum, most likely the problem lies in the sealed circuit or electrical system.
Opening the cooling system without special equipment is prohibited. The freon inside can be dangerous if not handled carefully, and moisture getting into the system will lead to expensive repairs. If you notice that the refrigerator has stopped freezing and is making a lot of noise, this is a sign of a freon leak or a blockage in the capillary system.
Also, the help of a specialist is needed when replacing the compressor. This is a complex technological process that requires soldering of tubes, evacuation and precise dosage of refrigerant. Any mistake will lead to the new motor burning out after a few days of operation.
You should not ignore the problem if the noise increases gradually. This indicates progressive wear of parts. A timely call to a technician at the stage when the first alarming symptoms appear can save you up to 50% of the cost of future repairs, preventing the failure of an expensive compressor.
Why does an old refrigerator hum louder than a new one?
Over time, mechanical parts wear out: rubber shock absorbers dry out, bearings break, spring tension weakens. In addition, older models often used less advanced soundproofing technologies. Natural wear and tear leads to the fact that a once quiet unit begins to work louder.
Can a refrigerator hum if there is no food in it?
Yes, it can, but the nature of the sound will change. An empty refrigerator will rise to temperature faster, so the compressor may turn on more often or run longer. In addition, the lack of products (which act as an acoustic buffer) can make internal noise louder and more noticeable.
Does line voltage affect the volume of operation?
Severe voltage surges can lead to unstable operation of the start relay and compressor. At low voltage, the motor may hum but not start, which causes overheating and increased noise. It is recommended to use a voltage stabilizer to protect equipment.
What to do if only the freezer is humming?
If it is the freezer that is humming, the problem is almost certainly related to the system No Frost. Most likely, the fan is faulty or ice has formed on the evaporator. The fan needs to be defrosted or replaced.
Is it normal if the refrigerator hums louder after defrosting?
In the first hours after turning it on - yes. An empty refrigerator without heat-intensive products operates at maximum load to cool the volume. After 5-7 hours, when the temperature stabilizes, the noise level should return to normal values.