A strange hum or gurgle that suddenly appears in the refrigerator can disturb the usual peace in the house. Many owners of household appliances begin to panic, believing that the unit is out of order and requires expensive repairs. However, in most cases, such sounds are absolutely normal the working process of refrigerant circulation through the system.
Understanding the physics of the compressor and evaporator helps to quickly distinguish a normal situation from a real breakdown. If the noise occurred immediately after purchase or turned on after defrosting, most likely there is nothing to worry about. However, there are scenarios when murmuring signals a valve malfunction or a freon leak.
In this article we will analyze in detail all the possible causes of extraneous noise. You will learn how to independently conduct primary diagnostics and understand in which cases specialist intervention is required. It is important to take into account the model of your device, since the designs Indesit, Atlant or Bosch may have their own acoustic characteristics.
Physics of the process: why refrigerant flows
The main reason for the appearance of sounds reminiscent of water pouring lies in the principle of operation of the refrigeration circuit. A gaseous substance circulates inside the system - refrigerant (freon), which, under the pressure of the compressor, changes from liquid to gaseous and back. It is this process of phase transition that is often accompanied by a characteristic gurgling.
When the compressor builds up pressure, liquid freon with a characteristic sound passes through the capillary tube and enters the evaporator. There it boils at low temperatures, taking heat from the chambers. After the motor stops, the process continues inertia, which may cause sounds for some time. This is especially noticeable in models with No Frost, where the system is more complex.
It is important to understand that modern refrigerators use environmentally friendly, but noisier types of freon. If previously quiet refrigerants were used, modern analogues (for example, R600a) can create a more pronounced acoustic background when moving through the tubes. Therefore whirling is often a sign that the system is sealed and working correctly.
Normal operating sounds of a refrigerator
Not all noises indicate a breakdown. There are a number of sounds that are considered standard for working equipment. These include the quiet hum of a running motor, clicks of the thermostat when turning on and off, as well as periodic gurgling.
These processes can occur especially loudly at night, when the apartment is quiet. If you hear liquid flowing inside the walls, and this sound does not last long after starting or before stopping the engine, this is normal. The design of modern chambers often promotes resonance, which enhances natural noise.
⚠️ Warning: If the gurgling sound is accompanied by a lack of cold or a constant, continuous hum, this may indicate a loss of circuit seal. In this case, you cannot hesitate to call a specialist.
Different brands have different levels of acoustic comfort. For example, equipment Liebherr is famous for its silence, while budget models Biryusa or Stinol can work louder due to the assembly features and case materials. Comparing the characteristics helps to assess the reality of the situation.
When noise signals a malfunction
Despite the fact that many sounds are natural, there are situations that require your attention. If the nature of the noise has changed dramatically, become louder, or new shades have been added to it (whistle, hiss), it is necessary to carry out a test. A frequent problem is a compressor malfunction or a clogged system. diagnostics. A common problem is a compressor malfunction or a clogged system.
One of the serious causes of gurgling is oil getting into the circuit or a clogged capillary tube. In this case, the refrigerant cannot circulate freely, creating excess pressure and characteristic sounds. It is also worth paying attention to vibration the housing - if it has become stronger, the motor mount may have become loose.
Another alarming symptom is the continuous operation of the compressor without shutdowns. If the refrigerator hums and gurgles continuously, trying to gain temperature, this may indicate a freon leak. The system tries to compensate for the lack of refrigerant by working hard.
To accurately determine the problem, it is useful to know the type of compressor of your device. Inverter models operate differently than regular models and have a different sound profile. Below is a table to help classify sounds.
| Sound type | Probable cause | Degree of danger | Required actions |
|---|---|---|---|
| Silent transfusion | Freon circulation | Normal | Observation |
| Loud bubbling + no cold | Refrigerant leakage | High | Call a technician |
| Gurgling + vibration | Incorrect installation | Low | Align legs |
| Hissing + whistling | Valve malfunction | Average | Diagnostics |
The effect of incorrect installation on acoustics
Often the reason that the refrigerator begins to make strange sounds is a banal violation of installation rules. If the housing is skewed or unstable, vibration from the operating compressor is transmitted to the floor and walls, creating resonance. This can enhance natural gurgling to an unpleasant level.
Check the horizontal installation using a building level. The legs of the refrigerator should be unscrewed so that the body is slightly tilted back. This ensures a tight fit of the door and proper operation of the self-closing mechanism, which also affects the overall vibration of the unit. vibration unit.
It is also worth inspecting the space around the device. If it is close to a wall or furniture, the sound wave may be reflected and amplified. A gap of a few centimeters can radically change the acoustic picture in a room. In addition, touching the refrigerator tubes to the body or other elements causes rattling.
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Problems with the No Frost system and defrosting
In refrigerators with the system No Frost sound generation processes can be more varied. A fan is constantly running here, which forces air through the evaporator. If ice freezes on the blades or a foreign object gets into the mechanism, a noise occurs that can be confused with gurgling.
In addition, in such models the defrosting heating element is regularly turned on. As the ice melts, water flows into the drainage tray, often accompanied by the sounds of dripping or flowing liquid. If the drain hole is clogged, water may gurgle in the pan or inside the channels, creating a "waterfall" effect.
Regular defrosting (at least once a year) helps prevent excess ice from accumulating, which will interfere with the system's performance. If you have not defrosted the refrigerator for a long time, and the sounds have become more intense, try performing a complete defrosting by unplugging it for 12-24 hours.
⚠️ Attention: Under no circumstances use sharp objects to chip ice inside the chambers. Damage to the evaporator will lead to an immediate leak of freon and expensive repairs.
Diagnostics of the compressor and start relay
The heart of the refrigerator is the compressor. If it does not work correctly, this is immediately reflected in the sound background. Wear of the piston group, problems with the valves or a malfunction of the start relay can cause not only gurgling, but also knocking, humming or clicking.
The starting relay is responsible for starting the engine. If it is faulty, the compressor may try to start, make a "gurg-click" sound, and shut down. In some cases, the relay may “crack” during operation, which can easily be confused with refrigerant noise. Replacing this part usually solves the problem.
For diagnostics, you can carefully (with the device turned off) remove the back panel and inspect the compressor. Pay attention to the condition of the tubes: is there any oil on them (a sign of leakage), are the fasteners intact. However, it is better to entrust the internal diagnostics of the compressor to professionals with a pressure gauge.
Is it possible to replace the compressor yourself?
Theoretically, yes, but this requires special equipment for vacuuming the system and charging freon. Without these tools, repairs are impossible, so replacing the compressor yourself at home is not recommended.
Frequently asked questions and answers (FAQ)
Why does a new refrigerator gurgle loudly?
New models are often louder than older ones due to the type of refrigerant used and the design of the compressor. During the break-in period (the first 2-3 weeks), the sounds may be more pronounced. If the cold persists and the temperature is normal, this is normal.
The refrigerator gurgles and does not freeze, what should you do?
This is a classic sign of a freon leak or a clogged system. The refrigerant circulates but does not cool. It is necessary to immediately disconnect the device from the network and call a technician to find a leak and refill it.
Can an empty refrigerator gurgle?
Yes, an empty refrigerator can be louder than a full one. Products and packaging inside the chambers act as sound absorbers, dampening vibrations and noise from a running motor. Filling the chambers often makes the operation of the equipment quieter.
Does the floor level affect the gurgling sound?
The floor level does not have a direct effect on the physics of freon boiling, but it is critically important for vibration. An uneven floor causes the cabinet to resonate, causing a quiet gurgling sound to be heard throughout the apartment. Be sure to adjust the legs.