A modern refrigerator is a complex mechanism that works around the clock, ensuring the safety of food. Owners of household appliances are often faced with a situation when strange sounds begin to be heard inside the unit, reminiscent of splashing, gurgling or liquid pouring. For many owners, this becomes a cause for serious concern and search for an answer to the question of why the refrigerator makes sounds of water.
In most cases, such acoustic phenomena do not indicate a breakdown. They are a consequence of physical processes occurring during the circulation of refrigerant through the system. However, you should not completely ignore noise, as in some cases it may indicate a violation of operating rules or clogged drainage channels.
Understanding the principles of operation compressor-condensing unit will help you distinguish normal operation of the equipment from a real malfunction. In this article we will examine in detail the physics of the occurrence of sounds, methods for diagnosing them and methods for eliminating unwanted noise.
Physics of the process: refrigerant circulation
The main reason why water gurgles in the refrigerator is movement refrigerant (freon) inside the evaporator tubes. The gaseous substance compressed by the compressor turns into a liquid state and then evaporates again, taking heat from the chambers.
This process is accompanied by a characteristic sound, which users often mistake for water pouring. In fact, a mixture of liquid and gas under pressure circulates in the tubes. When the refrigerant passes through narrow sections of the capillary tube or throttle, the flow rate changes, creating an acoustic effect.
The intensity of the noise depends on several factors, including the brand of freon used and the design of the system. Modern models with inverter compressors operate quieter, but the sound of circulation in them may be more distinct due to the absence of a constant hum of the motor.
Features of the No Frost system
In refrigerators equipped with the system No Frostthe sounds of water may be associated with the automatic defrosting process. Unlike older models, where the ice melted naturally, a special heating element is used here.
During the defrost cycle evaporator it heats up, and the frost accumulated on it turns into water. This moisture flows into a drain pan located above the compressor. It is the process of draining and subsequent evaporation of water that is often accompanied by gurgling sounds.
If the refrigerator makes water sounds at the exact moment when the compressor is not working, this almost certainly indicates normal defrosting mode. Water drips into the pan, and while it evaporates from the heat of the running motor, a hissing or quiet gurgling may occur.
Diagnostics of the drainage system
One of the common reasons why water gurgles loudly in the refrigerator is a partially clogged drainage hole. If moisture does not have time to drain into the pan quickly, it accumulates and creates characteristic sounds when air passes through the water plug.
To check, you need to inspect the back wall of the refrigerator compartment. The hole for water drainage is usually located at the bottom, in the center or offset to the side. If you see a puddle or ice there, it means the outflow is impaired.
For cleaning, you can use the special brush included in the kit, or a soft rubber bulb. Do not use sharp metal objects under any circumstances to avoid damaging the internal insulation channels.
☑️ Checking the drainage
⚠️ Attention: If after cleaning the drainage, water continues to accumulate at the bottom of the refrigerator compartment, the condensate collection tray may be displaced or the slope of the internal boxes In this case, a call to the technician is required.
The influence of location and installation level
Sometimes the answer to the question why the refrigerator makes water sounds lies not in the internal structure, but in incorrect installation. If the housing is skewed, the refrigerant may be unevenly distributed along the circuit, creating zones with increased noise levels during circulation.
In addition, when skewed, the geometry of the oil movement in the compressor is disrupted, which can also give additional acoustic effects, reminiscent of splashing. Checking the installation level is the first thing to do before calling a repair service.
Use a building level for diagnosis. Height adjustment is usually done using the front support legs, which can be unscrewed or tightened.
The table below shows the main signs of incorrect installation and their consequences:
| Symptom | Possible cause | Solution |
|---|---|---|
| Strong hum and vibration | The refrigerator touches the wall or furniture | Move the appliance 5-7 cm |
| Gurgling in the upper part | The case is skewed back | Unscrew front legs |
| The door does not close itself | Tilting forward or level installation | Adjusting the supports for tilting back |
| Puddles inside the chamber | The outflow of water is impaired due to tilt | Align the body level |
Time of year and temperature conditions
Seasonality also plays a role in how your refrigerator sounds. In summer, when the ambient temperature in the room is high, the compressor operates more intensively. This leads to more active circulation of freon and, as a result, more audible sounds in the tubes.
In winter, if the refrigerator is in an unheated room or near an open window, the viscosity of the oil in the compressor changes. This can lead to a change in the nature of the sound when starting and stopping the engine.
Is it possible to reduce the sound of a refrigerator?
You can reduce the noise level by making sure that the appliance is level, not overloaded with food, and that there is a gap for ventilation between the back wall and the furniture. Replacing the rubber damper pads under the compressor also helps.
It is important to monitor the temperature settings. If you have set the mode super freezing or the minimum temperature in the main chamber, the system will operate at the limit of its capabilities, which is always accompanied by louder sounds of operation of all components.
When to worry: signs of malfunction
Although gurgling is most often Normally, there are situations that require specialist intervention. If the sound of water is accompanied by a lack of cold, this may indicate a freon leak. An air lock forms in the system, which produces a loud whistling or gurgling sound.
Another alarming symptom is the appearance of oil around the compressor or on the floor under the equipment. This indicates a depressurization of the system. You should also be wary if the sound becomes metallic, ringing or is accompanied by knocking.
⚠️ Attention: If you hear a loud gurgling sound, but the food in the refrigerator has stopped cooling, immediately unplug the appliance. Further operation may lead to combustion of the compressor.
Diagnosis of circuit tightness and pressure testing should only be carried out by a specialist using a pressure gauge manifold. Independent intervention in the sealed system is prohibited.
Prevention and proper care
To minimize noise and extend the life of the equipment, it is important to follow the operating rules. Do not place hot food in the chamber - this causes sudden steam formation and an increase in pressure, which increases the circulation sounds.
Regularly defrost the refrigerator (if it is not No Frost) so that the layer of ice on the evaporator does not interfere with heat transfer. A thick ice crust makes the compressor work longer and more intensely.
Make sure that food does not touch the back wall of the chamber. This can cause cracking and transmission of vibration to the body, which can easily be confused with internal sounds of the unit.
Frequently asked questions (FAQ)
Why does the new refrigerator gurgle loudly?
New equipment may sound louder due to the lack of generation in the moving parts and more rigid seals. In addition, modern refrigerants may have different acoustics than older models. Usually, after 1-2 weeks of operation, the sound becomes quieter.
Is it dangerous if you can hear water pouring in the freezer?
If the freezer is working normally and the food is frozen, then the sound is safe. This circulates freon. Danger arises only when there is a burning smell, oil or a complete absence of cold.
Can the sound of water be a sign of freon leaks?
The sound itself is not a sign of a leak. However, if the noise level has changed sharply (became louder, a whistle has appeared) and the cold has disappeared, this may indicate depressurization and air entering the circuit.
How to distinguish the sound of water from the sound of oil in the compressor?
The sound of water (freon) is usually dull, gurgling and is heard throughout the entire volume of the cabinet or in the evaporator tubes. The sound of oil is more often associated with starting the engine, has a lower frequency and is localized in the lower rear part of the unit.
Do you need to call a technician if the refrigerator is just gurgling?
If the appliance cools, there are no leaks on the floor and no foreign odors, calling a technician is not required. This is the normal operating mode of the cooling system.