The appearance of extraneous sounds in a household refrigerator often causes concern among owners, especially if the equipment previously operated absolutely silently. A sound reminiscent of water transfusiongurgling or quiet gurgling can occur with varying frequency and intensity. In most cases, such acoustic phenomena do not indicate a critical breakdown, but are a consequence of physical processes occurring inside a closed cooling system.
Modern models of refrigeration equipment, be it Indesit, Bosch or LG, are designed taking into account many factors, including circulation refrigerant. Understanding exactly how the unit works helps to distinguish the normal operating mode from a sign of an incipient malfunction that requires the intervention of a technician.
It is important to note right away that you should not ignore sudden changes in the sound background, but there is also no reason to panic ahead of time. The sound of overflowing liquid most often indicates the movement of freon through the tubes of the evaporator and condenser, which is a natural part of the cooling cycle. Next we will analyze in detail all possible scenarios, from absolutely normal to those requiring repair.
Physics of the process: refrigerant circulation
The main reason why water overflowing is heard in the refrigerator lies in the properties of the liquid itself refrigerant. Modern systems use substances that are in a gaseous state at normal atmospheric pressure, but inside a closed circuit under pressure they circulate in liquid and gaseous phases. When liquid freon passes through the capillary tube and enters the expander, it boils, turning into gas, which creates a characteristic sound.
This process is reminiscent of how water boils in a kettle, only it happens inside metal tubes hidden behind the body panels. The sound intensity may vary depending on the current load on compressor and the temperature inside the chambers. At the moments when the engine starts to gain cold, the movement of the gas-air mixture becomes most active.
It should be taken into account that in different models of equipment, acoustic comfort is implemented differently. For example, in budget models Atlant or older series Stinol insulation may be less effective than in premium lines Siemens or Liebherr. Therefore, the sound of overflow can be heard more clearly if you are in close proximity to a running unit.
The physical properties of the refrigerant are such that it is colorless and odorless, and its movement through the system is the heartbeat of your refrigerator. If the sound is uniform and is not accompanied by other symptoms, such as a lack of cold or heating of the case, then, most likely, the system is functioning normally.
Normal sounds: when there is no need to worry
There are a number of situations where gurgling and gurgling are absolutely normal. a normal phenomenon. Manufacturers of household appliances specifically indicate this in their operating instructions to reduce the number of false service calls. Sounds may be associated with the end of the defrosting cycle or, conversely, with the beginning of active cooling after loading warm products.
Especially often, users encounter noise after defrosting the refrigerator or installing it for the first time. During this period, residual moisture in the drainage system or uneven distribution of oil in the compressor can give a specific acoustic effect. Typically, such sounds disappear on their own within several hours or days of operation.
Here are the main signs that your refrigerator is just “talking”:
- 💧 Periodicity: The sound appears cyclically, coinciding with the operation of the compressor, and subsides when the motor stops.
- 🔇 Intensity: The noise level does not exceed the normal background hum characteristic of operating household appliances.
- ❄️ Temperature conditions: The products in the chambers are cooled to the specified values, there is no freezing of ice.
- ⏱️ Duration: The sound does not last for hours on end without a break, but has clear beginnings and endings of cycles.
If you notice that after buying a new refrigerator it began to “murmur,” give it time. The equipment needs from 2 to 24 hours to stabilize operating processes and distribute lubricant in the system.
Problems with the drainage system
The second most common cause of water sounds is drainage system. In refrigerators with a system No Frost and in models with drip defrosting, the condensate that forms on the walls must be drained into a special tray located above the compressor. If this process fails, water may stagnate or leak out, creating splashing sounds.
Often the problem lies in a clogged drain hole. Crumbs, food particles or mold can clog the channel, causing water to accumulate inside the gutter instead of draining away. When vibrating from the operation of the compressor, this water begins to ripple and make sounds, which the user interprets as overflowing inside the housing.
☑️ Checking the drainage system
It is also worth checking the evaporator tray, which is located at the back of the refrigerator, at the bottom. If it is cracked or dislodged, water may drip directly onto the hot compressor, causing hissing and gurgling noises. This is not only noisy, but also harmful to electronics and metal parts, as it promotes corrosion.
For prevention, it is recommended to regularly, at least once every six months, check the cleanliness of the drainage channel. Use warm water or special refrigerator cleaning products to dissolve grease deposits, which often cause traffic jams.
Faults that require the attention of a technician
Unfortunately, the sound of overflowing water is not always harmless. There are technical malfunctions that are disguised as natural gurgling, but in fact indicate serious problems with cooling circuit. If you ignore these signals, repairs can be much more expensive, up to the need to replace the compressor or the entire refrigeration unit.
One of these problems is refrigerant leak. When the freon in the system becomes less than normal, the compressor begins to work with increased load, trying to compensate for the lack of cold. In this case, the sound of gas movement becomes louder, whistling, or reminiscent of the active pouring of liquid into an empty container.
⚠️ Attention: If, along with the appearance of strange sounds, you notice that the refrigerator has stopped freezing and the motor is running non-stop, immediately unplug the appliance and call a specialist. Operation with a freon leak can lead to the compressor burning out.
Another possible reason is air or moisture getting into the circuit. This often happens with poor-quality previous repairs. Moisture in the system freezes in the capillary tube, creating an ice plug, which then thaws, causing characteristic sounds. The air disrupts the normal circulation of the refrigerant, creating air pockets that “gurgle” through the system.
The following is a table that helps differentiate the symptoms:
| Symptom | Probable cause | Repair needed |
|---|---|---|
| Quiet gurgling when the engine is running | Freon circulation (normal) | Not required |
| Loud overflow + water on the floor | Drainage clogged or tray displaced | Cleaning required |
| Sound + lack of cold | Freon leak or plug | Urgent |
| Gurgling + valve knock | Solenoid valve malfunction | Replacement required |
Influence of installation and level of technology
Correct installation of a refrigerator plays a key role in the level of noise produced. If the unit is not level, vibrations from the operating compressor are transmitted to the housing and amplified, causing the internal tubes and liquids to resonate. This may create the illusion of a louder pouring of water than it actually is.
Be sure to check the horizontal installation using a building level. Height adjustment is carried out by twisting or unscrewing the front support legs. The correct position ensures not only silence, but also the correct closing of the doors, which is critical for energy efficiency.
It is also worth checking whether the refrigerator is touching the walls of kitchen furniture or other objects. Even the slightest touch can transmit vibration that will sound like a buzzing or gurgling sound. Move the equipment away from the wall and make sure that it is stable and does not wobble when pressed lightly.
Sometimes users themselves become the culprits of the noise by installing unstable dishes or poorly secured shelves inside the chambers. The vibration passing through the body causes bottles of liquid to rattle, which is easily confused with the internal sounds of the unit. Check the contents of the refrigerator before diagnosing a breakdown.
Specifics of the No Frost system
Refrigerators equipped with the system No Frosthave a more complex design than their counterparts with drip defrosting. The presence of fans, additional air ducts and evaporators makes adjustments to the acoustic picture. The sounds of overflow here may be associated with the operation of the condensate drainage system from the evaporator.
In such models, defrosting water flows into the pan, where a special plate is located, heated by the heat of the compressor. If this process is disrupted, or if the ice in the evaporator does not have time to completely melt due to a malfunction Defrost heating element, strange sounds of dripping or flowing water may occur inside the freezer.
A frequent problem is the freezing of the “coat” on the evaporator. When the compressor turns off, the ice begins to melt and water noisily flows into the drain. If the drainage is clogged, water accumulates and during the next cycle of operation it can create the effect of a water hammer or loud gurgling in the air ducts.
How to check the defrost heating element?
To check the heating element, you need a multimeter. It is necessary to test the heating element for resistance. If the device shows a break (infinity), it means that the heating element has burned out and requires replacement. It is dangerous to do this on your own without skills in working with electricity.
Equipment owners No Frost should be especially attentive to the condition of door seals. The suction of warm air leads to increased formation of condensation, which the drainage system may not be able to cope with, which gives rise to unnecessary sounds.
Methods of diagnosis and prevention
To accurately determine the cause of the noise, you can carry out a simple independent diagnosis. First of all, listen to exactly when the sound appears: only when the engine is running, immediately after it stops, or at any time. This will help narrow down your search.
Try to gently press the back or side wall of the refrigerator with your hand at the moment the sound appears. If the noise pattern changes, it may be due to chassis vibration or loose panels. If the sound remains the same, the source is most likely located inside the system.
⚠️ Warning: Do not attempt to open the sealed cooling circuit or disconnect the tubes yourself. The refrigerant is under pressure and leakage is dangerous. All work with freon must be carried out by certified specialists.
As a preventive measure, it is recommended to completely defrost the refrigerator once a year (unless the instructions prohibit doing this frequently) and thoroughly clean it. Cleaning the condenser grille at the back of the refrigerator from dust also helps reduce the load on the compressor, making its operation quieter.
If after all checks the sound persists, gets stronger, or is accompanied by other alarming symptoms, do not delay contacting service center Professional diagnostics using leak detectors and pressure gauges will accurately identify the problem and fix it before it leads to serious damage.
Is it normal that the sound appears only at night?
Yes, this is normal. At night, the overall noise level in the apartment decreases, and you begin to notice the sounds of equipment that were drowned out by household noise during the day. In addition, at night the compressor turns on more often, since the doors are opened less frequently, and the temperature has time to level out.
Can a new refrigerator gurgle?
A new refrigerator can make sounds during the break-in period (the first 2-3 days). The oil is distributed in the compressor and the refrigerant is adapted. If the sound is not accompanied by a lack of cold, there is no need to worry.
Is the sound of pouring dangerous for food?
The sound itself is not dangerous for food. The cause of the sound is dangerous. If this is a freon leak, then the food may spoil due to defrosting. If it’s just the physics of the process, the products are safe.
Why is there more noise in the freezer than in the refrigerator?
In the freezer the temperature is lower, and the processes of evaporation and condensation can occur more intensely. In addition, in No Frost systems, the evaporator is often located in the freezer compartment or behind its panel.
Is it necessary to change the refrigerant if it gurgles?
No, the refrigerant does not require replacement during operation, since the system is sealed. Replacement is only required when repairing a leak. Gurgling is a sign of its operation, not wear.