Extraneous noise from operating household appliances always causes concern, especially when it comes to a refrigerator that operates around the clock. If your Atlant two-chamber refrigerator starts to buzz louder than usual or makes unusual sounds, you should not ignore it. Humming can be either a natural work process or a harbinger of a serious breakdown that requires immediate intervention.
Owners of equipment of this brand often face the fact that the noise level increases over time. This may be due to normal wear and tear, housing misalignment, or problems with the refrigerant circulation system. Understanding the nature of sound is the first step to solving the problem without calling a specialist.
In this article we will analyze in detail all the possible causes of the hum, specific to the Belarusian brand Atlant. You will learn how to carry out initial diagnostics on your own and in which cases replacement of components will be required.
Natural noise and design features of the model
Before sounding the alarm, you need to make sure that the hum you hear is not the norm for this model. Modern refrigerators, including two-chamber units Atlantare often equipped with a No Frost system or improved air circulation, which means the operation of fans. These mechanisms create constant background noise, which can intensify during moments of active cooling.
In addition, compressors, even the most modern ones, emit vibration during operation. If the refrigerator has just been installed or loaded with a large amount of warm food, it will work in enhanced mode. In such cases intense humming this is a normal situation, indicating that the equipment is trying to quickly reach the set temperature.
⚠️ Attention: If the refrigerator makes loud gurgling or shimmering sounds immediately after the compressor is turned off, this is normal. This is how the refrigerant behaves as it flows through the pipes of the system.
However, you should be wary if the nature of the sound has changed sharply. For example, a steady hum was replaced by rattling or metallic clanging. It is also important to take into account the age of the equipment: for older models, a noise level of 40-45 dB can be considered working, while new models should work quieter.
Installation problems and vibration of the case
One of the most common reasons why a refrigerator hums Atlantis incorrect installation. Even the slightest misalignment or contact of the body with walls, furniture or each other (if the equipment is standing closely) causes resonance. Vibration from a running compressor is transmitted to the housing and intensifies, creating a strong hum effect.
Check the distance between the back of the refrigerator and the wall. It should be at least 5-7 centimeters for free air circulation and lack of resonance. Also make sure that the unit is strictly horizontal. Adjusting the legs is a simple procedure that often fixes the problem without disassembling the equipment.
Pay attention to the internal contents. Bottles, cans or dishes standing on shelves can rattle. If, when you lightly press the door or shelf, the hum stops or the tone stops, then the problem lies in the contact of the housing with foreign objects.
Users often forget about the shipping container. Inside the case, especially in models with the system No Frost, pieces of foam or plastic clamps could remain, which, when vibrating, begin to knock on the walls of the chamber.
Faults of the compressor and start relay
The heart of the refrigerator is the compressor. If it is this that hums, and the sound is accompanied by strong vibration of the entire body, it is possible that the internal mechanisms of the motor are wearing out. In two-chamber models Atlant two compressors are often installed (separately for the freezer and refrigerator), and only one of them can hum.
Another common problem is the failure of the start relay. This small element is responsible for starting the engine. If the relay is faulty, the compressor may hum but not start, or make a loud clicking noise before starting. In such cases, the relay needs to be replaced, which is a repair of average complexity.
There is a concept of “hydraulic hammer” in the compressor. If oil or liquid freon gets into the system, a loud knocking or hum may be heard when starting up. This condition is dangerous for the durability of the motor.
Diagnostics of the compressor requires caution. When the unit is running, do not touch the metal parts of the motor, as they may be live or very hot.
How to distinguish a noisy compressor from a fan?
Open the refrigerator door. In many models, when the door is open, the fan stops (the sensor is triggered), but the compressor continues to work. If the hum disappears when the door is open, the problem is in the fan. If the hum is the same, the source is in the compressor.
Ventilation and No Frost system
In two-chamber refrigerators Atlant with an automatic defrosting system (No Frost), fans are responsible for air circulation. Over time, fan bearings wear out, resulting in a characteristic whining or humming sound. Noise can also occur if the fan blades touch ice or a foreign object.
Often owners are faced with a situation where, after defrosting, the refrigerator begins to hum more strongly. This may mean that a “coat” of ice has formed in the evaporator, which interferes with the normal rotation of the impeller. Ice can break off and get into the mechanism, causing friction and humming.
Inspecting the fan often requires partial disassembly of the back wall of the freezer or refrigerator compartment. A visual inspection will reveal ice, dust or mechanical damage to the blades.
If the fan is humming due to dried grease, you can try to lubricate it, but most often in the context of household repairs it is more advisable to replace the entire assembly, since new bearings are difficult to find.
Pipelines and fastening of elements
The refrigerant circulation system consists of many copper tubes. With prolonged use and constant vibration, the tube fastenings may become loose. As a result, the tubes begin to touch each other or the walls of the case, emitting a ringing metallic hum or rattling.
To fix this problem, you need to carefully move the refrigerator and inspect its back. Sometimes it is enough to slightly separate the tubes with your hand or a tool (with the device unplugged!) or place a piece of rubber or foam rubber between them.
Also check the fastening of the compressor itself. The rubber shock absorbers on which it is installed could dry out or burst. In this case, the vibration is transmitted directly to the metal frame of the refrigerator, increasing the noise significantly.
☑️ Diagnosis of noise sources
When trying to straighten or move them, you must act extremely carefully so as not to damage the tightness of the system. Violation of the integrity of the tube will lead to freon leakage and expensive repairs.
Table: Diagnostics by sound type
To more accurately determine the cause of the malfunction, use the table below. The nature of the sound often suggests which unit requires attention.
| Sound type | Probable cause | Necessary actions |
|---|---|---|
| Smooth low hum | Normal operation compressor | Check the installation, distance to the walls |
| Metal clanging/knock | Touching the tubes, compressor malfunction | Spread the tubes, check the shock absorbers |
| Whistling or howling | Fan malfunction | Defrost, replace the fan |
| Gurgling | Freon overflow | Normal (if not accompanied by loss of cold) |
| Humming with clicks | Problems with the starting relay | Replacing the starting relay |
When analyzing the sound, try to localize its source. Place your hand (carefully!) on different parts of the body. Vibration in the lower part will indicate the compressor, in the upper or inside the chamber - the fan.
Prevention and operating rules
In order for your Atlant two-chamber refrigerator to serve for a long time and work quietly, it is important to follow the operating rules. Regular defrosting (even for the No Frost system is recommended once a year) will prevent the build-up of excess ice, which loads the compressor and interferes with the fans.
Do not place the refrigerator close to the wall and do not overload the shelves. Heavy objects on the door can cause distortion and additional noise when closing. Also, keep the condenser (grids at the back) clean - dust and animal hair worsen heat transfer, causing the motor to work harder and noisier.
⚠️ Attention: Never try to repair a sealed circuit or replace the compressor yourself without special equipment and a license. This is dangerous to life and health.
Timely maintenance extends the life of equipment. If you notice that the refrigerator has started to become louder, do not expect a complete breakdown. Early diagnosis often allows you to get by with a simple adjustment or replacement of an inexpensive part.
Frequently asked questions (FAQ)
Why does the new Atlant refrigerator buzz loudly at first days?
New equipment takes time to “break in”. In addition, during transportation, the oil in the compressor may have mixed with the refrigerant. Let the refrigerator sit unplugged for a few hours after delivery, then let it run for 1-2 days without loading. Usually the noise returns to normal.
Is it possible to lubricate a compressor if it starts to hum?
The compressor itself is a sealed unit and cannot be lubricated in domestic conditions. You can only lubricate external elements, for example, fan bearings (if the design allows), but most often they are replaced. An attempt to drill into the compressor for lubrication will lead to its instant failure.
Does the refrigerator hum more if the room is hot?
Yes, at high ambient temperatures the compressor is forced to work longer and harder to maintain cold inside the chambers. This may be accompanied by an increase in hum. Ensure proper ventilation around the unit.
What to do if a strong hum appears after defrosting?
There is probably ice left in the ventilation system that is interfering with the blades. Try leaving the refrigerator turned off with the doors open for another 10-12 hours to completely evaporate the moisture. If the noise does not go away, fan diagnostics is required.
Is the hum a sign of a freon leak?
A freon leak itself does not cause a hum. However, if a leak causes the compressor to run non-stop trying to get up to temperature, it may overheat and become noisier than usual. A related symptom is the absence of cold or poor cooling.