A modern refrigerator should operate quietly, creating only a subtle background hum that does not interfere with daytime rest or night sleep. However, equipment owners Biryusa often face a situation when the unit begins to make extraneous sounds: a loud hum, periodic knocking or obsessive gurgling. This is not just discomfort, but also a signal that changes have occurred in the operation of of the refrigeration system that require attention.
Before calling a technician or panicking, it is necessary to carry out an initial diagnosis. Many sounds are absolutely normal for the operating cycle, especially if the equipment has just been installed or defrosted. It is important to be able to distinguish normal noise effects from signs of serious damage, such as wear compressor or a leakage.
In this article we will analyze in detail all the possible causes of noise characteristic of models Biryusaand provide step-by-step instructions for their elimination. You will learn how to check the motor mount, adjust the legs, and determine when a hum indicates a freon leak or an electronic malfunction.
Natural sounds of a refrigerator
A new refrigerator or a device that has just gone through a defrost cycle always makes more sounds than a familiar unit. This is due to the physical processes occurring inside the circuit. In the first hours of operation refrigerant actively circulates through the system, passing from liquid to gaseous state and back, which may be accompanied by characteristic gurgling or hissing.
This is especially noticeable in models with the system No Frost, where the sound of a running fan is full-time. The air is forced to circulate through the chambers, and if you hear a uniform whistle or hum of the wind, this means that the heat removal system is functioning properly. Typically, such sounds become quieter or are no longer noticed by the owner after a few days of operation.
⚠️ Attention: If, after the initial start-up, the loud noise does not subside within 2-3 days, and the nature of the sounds changes to a metal clanging or vibration of the case, it is necessary to stop use and carry out an inspection.
It is also worth considering thermal expansion materials. The plastic of the inner housing and the metal elements of the tubes may become slightly deformed when the temperature changes, producing clicking sounds. This is absolutely normal for any equipment, including Biryusu, and does not require intervention.
Normal noise level
According to GOSTs, the noise level of household refrigerators should not exceed 40 dB in normal mode and 50 dB in normal mode quick freezing. For comparison: a quiet conversation is 30-40 dB, and street noise is 60-70 dB.
Problems with installation and vibration of the case
One of the most common reasons why a refrigerator Biryusa hums or vibrates is incorrect installation. If the body is skewed or the legs are not adjusted, resonance occurs. Vibration from a running compressor is transmitted to the floor and walls, amplifying the sound many times over. You can check the stability by slightly shaking the unit from side to side.
The second important aspect is the distance to the walls and furniture. The back wall of the refrigerator should not fit tightly to the surface, since the condenser and compressor are located there, requiring ventilation. If the gap is insufficient (less than 5 cm), an acoustic effect occurs, increasing the hum, as well as the risk of overheating.
☑️ Checking the installation
Vibration is often caused by objects located inside the chambers or on the top cover. Heavy pots, jars or glass bottles coming into contact with each other can rattle due to micro-vibration of the shelves. Remove all excess from the roof and check the stability of the dishes on the shelves.
Faults of the compressor and start relay
The heart of the refrigerator is the compressor. If motor-compressor is worn out, it starts to work louder than usual. Older models Biryusa were often equipped with rather noisy units, but if the sound changed abruptly, you should be wary. A loud hum that turns into a growl may indicate wear on the internal bearings or piston group.
Another common problem is a faulty start relay. This element is responsible for starting the engine. If the relay is stuck or fails, the compressor may try to start, make a clicking sound, but not turn on, or work intermittently, creating a characteristic intermittent noise.
| Sound type | Probable cause | Actions |
|---|---|---|
| Monotonous hum | Normal operation or wear of the compressor | Check fastening, oil level |
| Clicks and humming | Faulty start relay | Replacement of the relay (requires a master) |
| Metal knocking | Internal wear of the compressor | Urgent repair or replacement |
| Whistling when starting | Problems with freon or valves | Tightness diagnostics |
If you hear that the compressor is working “out of order” or its beating is transmitted to the entire housing, the rubber shock absorbers on which it is attached may have worn out. In this case, the motor simply “dangles” and hits the metal elements of the frame.
Fan noise in the No Frost system
In refrigerators Biryusa with the system No Frost the fan is responsible for air circulation. Over time, ice can build up on its blades, especially if the door seal is worn and leaking moist air. The ice crust disrupts the balancing, and the fan begins to hum, crackle, or touch the blades with ice.
Sometimes the problem lies in the dried grease of the fan bushing. In this case, a piercing creaking or high-frequency squeak is heard, which appears and disappears. If the fan is not lubricated or replaced, it may become completely jammed, which will stop cooling the chamber.
For diagnostics, you need to defrost the refrigerator for 10-12 hours. If after complete defrosting and drying the noise disappeared, but after a couple of days it appeared again, it means that the outflow of water or the seal of the door is broken, and the moisture freezes on the fan again.
Foreign objects and rattling
Sometimes the source of noise is trivial - it is the rattling of internal elements. Vibration can be transmitted to plastic shelves, egg trays or vegetable containers. If they do not fit tightly in the grooves or have cracks, they will make an annoying ringing sound every time you turn on the motor.
It is also worth checking the back panel of the refrigerator. The compressor guard (if equipped) may be loose or deformed. Metal tubes running next to the body can come into contact with each other when vibrating, creating a metallic ringing.
To fix this problem, use damping materials. These can be special rubber gaskets, pieces of foam rubber, or even ordinary plastic clamps that can be used to secure the tubes so that they do not touch each other and the walls.
⚠️ Attention: Never use metal objects to straighten the tubes or fix parts inside the refrigerator. This can lead to a puncture of the system and leakage of freon.
When you need to call a technician
There are a number of symptoms for which self-repair not only will not help, but can also aggravate the situation. If the refrigerator Biryusa began to make noise and at the same time stopped freezing, or oily spots appeared on the floor - these are signs of serious damage.
A refrigerant leak is often accompanied by a change in the sound of operation: the compressor starts working without interruption, trying to gain temperature, and hums much louder than usual. In this case, it is necessary to search for leaks, evacuate the system and refill with new freon.
Another alarming signal is a burning smell along with loud noise. This may indicate overheating of the motor windings or problems with the wiring. In such cases, the device must be immediately disconnected from the network.
Noise prevention and equipment care
If your refrigerator Biryusa serves for a long time and quietly, it is important to follow the operating rules. Regularly, at least once every six months, check the cleanliness of the condenser at the back. Dust and animal hair collected in the grille cause the compressor to work with increased load, which increases the noise.
Monitor the condition of the rubber seals on the doors. If they do not fit tightly, warm air enters the chamber, causing the motor to turn on more often and work longer. Wipe the seals with a soft cloth and check their elasticity.
Do not overload the shelves with products. A crowded refrigerator not only means poor air circulation, but also an additional load on the structure, which can begin to resonate. Distribute food evenly.
Does the floor affect the noise?
Yes, a wooden floor or a floor with voids can act as a resonator, increasing the hum of the refrigerator. In such cases, it is recommended to place special anti-vibration pads or a thick rubber mat under the legs.
Why does the Biryusa refrigerator hum loudly immediately after turning it on?
A loud hum in the first minutes of operation is often due to the fact that the compressor is entering operating mode and the refrigerant begins to actively circulate. If the hum is monotonous and after 5-10 minutes subsides to the normal background, this is normal. If the sound persists or is accompanied by knocking, check the motor mount.
Is it possible to lubricate the refrigerator compressor?
You cannot lubricate the compressor yourself. This is a sealed unit, and any violation of its integrity will lead to the release of freon and failure. Lubrication is required only for external moving parts, such as fan bushings, and only with special frost-resistant compounds.
What to do if the Biryusa refrigerator cracks during defrosting?
Cracking during defrosting is usually caused by thermal expansion of plastic or ice chipping in the No Frost system. If the sound does not resemble metal impacts and is not accompanied by sparking, this is a normal process. Make sure that the water collection tray is installed correctly.
How to understand that it is the compressor that is making noise and not something else?
Put your hand on the back wall at the bottom where the motor is located. If you feel a strong vibration that is transmitted to the housing, and a hum comes from there, the problem is in the compressor or its mounting. If there is no vibration, but the sound comes from inside the chamber, most likely the fan is making noise.
Is it normal that an old refrigerator is noisier than a new one?
Yes, over time the bearings wear out, the rubber shock absorbers dry out and the fastening of parts weakens. Old models Biryusa structurally can be noisier than modern analogues. However, a sharp change in the nature of the noise always requires diagnosis.