The appearance of extraneous sounds in household appliances often causes concern among owners, especially if the device previously worked quietly. Gurgling water in the refrigerator - this is one of the most common symptoms, with faced by users of modern and old models. In most cases, this sound is an absolutely normal physical process associated with the circulation of refrigerant in the cooling system.
However, noise cannot always be ignored. Sometimes the sound changes, becomes louder, or is accompanied by other signs of a problem, such as insufficient cooling of the chambers or the formation of ice. It is important to be able to distinguish between normal operation compressor and the beginning of a serious breakdown that requires the intervention of a specialist.
In this article we will analyze in detail all the possible causes of liquid sounds inside the unit. We will look at the design of the system No Frost and drip defrosting, explain the physics of freon movement and indicate situations when it is necessary to urgently contact a service center.
Physics of the process: movement of refrigerant through the system
The main reason why you hear the sounds of flowing liquid lies in the principle of operation refrigeration circuit. Freon circulates inside the thin tubes surrounding the freezer and refrigerator compartments. It constantly changes its state of aggregation, moving from a liquid to a gaseous state and back, which is necessary to remove heat from the internal space. refrigerant (freon). It constantly changes its state of aggregation, moving from liquid to gaseous and back, which is necessary to remove heat from the internal space.
When compressor turns off or goes into standby mode, the pressure in the system equalizes. At this moment, the remaining liquid freon and the oil that circulates with it to lubricate the rubbing parts begin to flow down under the influence of gravity. It is this process of drops of liquid falling along the bends of the tubes that creates the characteristic gurgling, bubbling or sound of pouring water.
The intensity of the sounds directly depends on the design of the evaporator and the amount of refrigerant in the system. In modern models that use environmentally friendly but less efficient freons, circulation may be noisier. The volume is also affected by the location of the capillary tube relative to the internal shelves and walls of the chamber.
It is worth noting that in some models the sound can be heard only at certain points in the operating cycle. For example, immediately after closing the door, when warm air enters the chamber and the system starts intensive cooling, the movement of gases and liquids becomes more active.
Defrosting system and condensate drain
Another common cause of water sounds is the operation of the condensate drain system. In refrigerators with a drip defrosting system or No Frost moisture formed on the walls must be removed. The melt water flows into a special tray located above the compressor, where it evaporates due to the heat of the running motor.
If the drainage hole is partially clogged or the water drains too quickly, you may hear the sounds of overflowing. In the system No Frost water is drained from the evaporator area into the pan, and this process is often accompanied by sounds similar to the flow of a stream. This is a normal situation, especially during periods of active defrosting, when the heating element melts ice on the evaporator.
- 💧 The sound of flowing water is most often heard immediately after the compressor is turned off.
- 🌡️ During the defrosting period, the noise may increase due to the large volume of melting water.
- 🔌 Interruptions in the operation of the fan can create the illusion of gurgling, although in fact it is the hum of the motor.
It is important to monitor the condition of the drainage channel. If it becomes clogged with food debris or mold, water will begin to pool inside the chamber or under the crisper drawers, creating additional splashing sounds when the door is opened. Regular cleaning of the hole with a special flexible brush or cotton swab will help avoid this problem.
⚠️ Attention: If water does not go into the pan, but accumulates at the bottom of the refrigerator compartment, this indicates a clogged drainage or freezing of the drainage channel. The unit must be defrosted for at least 12-24 hours to completely eliminate the ice plug.
The influence of the compressor operating mode
The nature of the sounds often changes depending on the operating mode motor-compressor. Modern inverter models are able to smoothly regulate power, which makes their operation almost silent, but the sounds of freon flowing into them can be heard more clearly due to the general silence. Old linear compressors operate cyclically: they turn on at full power and then turn off completely.
When the engine starts or stops, the pressure in the system changes sharply. It is during these seconds (10-30 seconds after turning on or off) that the sounds of refrigerant movement are most pronounced. If your refrigerator makes gurgling sounds exactly during these periods of time, then with a 99% probability the device is working properly.
However, if the gurgling is accompanied by vibration of the body or a humming sound that reverberates throughout the kitchen, it is worth checking the installation of the unit. An uneven floor or touching the back wall of a cabinet can increase the resonance, making the normal sounds of the cooling system unpleasantly loud.
Why are inverter refrigerators quieter?
Inverter compressors do not turn off completely, but only reduce the speed. This eliminates sudden pressure surges and inrush currents, which makes the start of work almost silent, unlike classic models.
Improper installation and operation
Sometimes the cause of extraneous noise lies not in the internal device, but in installation errors. If the refrigerator is not level, the oil in the compressor may be distributed unevenly, and the refrigerant may circulate with impaired hydrodynamics, which generates unnecessary sounds.
It is also worth checking the distance to the walls. For normal air circulation around the condenser (grid at the back), a gap is required. If the refrigerator is pushed close to the wall, the heat is not removed effectively, the compressor is overloaded, and the sounds in the system become more intense.
| Problem | Symptoms | Solution |
|---|---|---|
| Uneven floor | Vibration, humming, sound displacement | Adjusting the support knives by level |
| Touching the walls | Resonance, increased noise | Move the refrigerator 5-10 cm |
| Unstable shelf | Rattling, ringing | Adjust shelves and containers |
| Overflow | Impaired air circulation | Do not place products close together to the back wall |
Pay attention to the contents of the chambers. Glass bottles or plastic containers placed close to each other can ring from vibration, creating the illusion of internal noise of the unit. Move the products so that they do not touch each other and the walls of the chamber, and listen to see if the acoustic picture changes.
☑️ Checking the installation of the refrigerator
When gurgling is a sign of a malfunction
Although in most cases the sounds of water are safe, there are situations when they signal a breakdown. If the gurgling has become constant, very loud and is accompanied by a lack of cold or, conversely, severe freezing of food, this is a reason for diagnosis.
One of the serious problems may be freon leak. When the amount of refrigerant in the system becomes critically low, it begins to move at high speed, creating a whistling or loud gurgling sound. In this case, the refrigerator stops freezing, and the compressor works almost non-stop, trying to gain temperature.
Another possible reason is moisture or air getting into the system. This can happen due to unqualified repairs. Foreign substances disrupt normal circulation and cause the formation of ice plugs in the capillary tube, which is also accompanied by characteristic sounds and incorrect operation.
⚠️ Attention: If you notice that the refrigerator has stopped turning off, and oily stains or a burning smell have appeared on the rear grille, immediately unplug the device and call a technician. Operation in this mode is dangerous.
Methods for diagnosing and eliminating noise
If sounds bother you, try carrying out simple diagnostics. First, make sure the refrigerator is level. Then listen to where exactly the sound is coming from: above, below or behind. Localization will help to understand the nature of the noise - whether the fan is running, whether water is flowing in the pan, or the compressor is humming.
In the case of the system No Frost sometimes complete defrosting helps. Unplug the appliance for a day, leaving the doors open. This will allow the ice to melt in hidden cavities and clear the drainage naturally. Often, after such a procedure, extraneous sounds disappear.
If the gurgling is accompanied by other alarming symptoms, self-repair can be dangerous. Intervention in a sealed circuit requires special equipment and skills. An attempt to top up freon or clean the capillary without experience can completely damage the unit.
Is it normal if the refrigerator gurgles immediately after purchase?
Yes, this is absolutely normal. During the first transportation, oil may have entered the refrigerant circuit. During the first days of operation, it will gradually return to the compressor, causing leakage sounds. Usually, after 3-5 days of normal operation, the sounds subside.
Why did the old refrigerator begin to gurgle more than before?
Over time, microscopic deposits can form in the system, and the compressor wears out, which changes the circulation pattern. The sound insulation of the housing could also be damaged. If the cold persists, most likely the unit is simply “older” and requires more careful handling.
Can an empty refrigerator gurgle?
Yes, it can. The presence or absence of products does not affect the movement of freon through the tubes. However, a full refrigerator maintains its temperature better, and the compressor turns on less often, so you will hear sounds less often. An empty unit will turn on more often, and the processes will be more noticeable.
Does the room temperature affect the sounds in the refrigerator?
Yes, it does. In a hot room, the compressor works harder and longer to maintain the set temperature. This increases the circulation time of the refrigerant and the likelihood of hearing sounds of refrigerant movement. In a cool room, equipment works quieter and less often.
What to do if the gurgling does not go away after defrosting?
If complete defrosting (24 hours) did not help, and the sounds are accompanied by a deterioration in the quality of cooling, a technical malfunction is likely. It is necessary to check the operation of the thermostat, defrost sensors or the tightness of the system. Diagnostics by a technician is required.