The appearance of extraneous sounds in the operation of household appliances always causes concern for the owner. When the refrigerator gurgles, this may indicate both normal physical processes and serious malfunctions in the refrigerant circulation system. Understanding the nature of these sounds allows you to react in time and prevent food spoilage or expensive compressor repairs.
In most cases, the gurgle is associated with the movement of freon through the thin tubes of the evaporator and condenser. However, if the sounds are accompanied by a lack of cold or excessive engine noise, the situation requires detailed diagnosis. It is important to learn to distinguish between normal humming and signals for help from your unit.
Do not immediately panic or look for a service number. Often the reason lies in trivial things that you can check yourself in a few minutes. Next, we will analyze in detail the main scenarios for the occurrence of noise and action algorithms for each case.
Physics of the process: normal movement of refrigerant
The main reason why a sound reminiscent of water pouring is made is circulation refrigerant inside a closed loop. Freon constantly changes its state of aggregation, moving from liquid to gaseous and back. This process is accompanied by a characteristic gurgle, especially noticeable in the silence of the night.
In modern models, especially with the system No Frost, the refrigerant passes through the capillary tube and throttle, where the pressure drops sharply. It is at this moment that the liquid boils, creating a sound background. If the refrigerator is installed correctly and levelly, these sounds are usually quiet and do not irritate the ear.
⚠️ Attention: If the gurgling is accompanied by sharp clicks or humming, which increases and does not stop for more than 10 minutes, this may indicate an overload of the compressor.
The phenomenon is considered normal when the sound occurs immediately after the motor stops or, conversely, at the time of its launch. At this time, the pressure in the system is equalized, and the remaining liquid freon flows into certain areas of the circuit. Gas circulation at this moment it is most active and audible.
It is important to consider that in new models with inverter compressors the sound may be more constant, but less loud than in old ones linear units. Smooth power adjustment does not exclude the movement of liquid through the tubes, so light background noise is acceptable.
How to distinguish normal noise from abnormal noise?
Normal sound is uniform, quiet and periodic. Abnormal noise is often accompanied by vibration of the case, sudden changes in volume, or occurs only when touching the walls of the refrigerator.
The impact of improper installation on acoustics
Often, equipment owners forget that the quality of operation of the refrigerator directly depends on its position in space. If the unit is not level, the refrigerant may stagnate in certain areas of the pipes, creating air pockets. It is they who emit a loud gurgle when freon passes through them.
For correct operation of the door and proper circulation of oils in the compressor, the refrigerator must be installed with a slight tilt back. Adjustment is carried out using the front support legs. If this parameter is violated, the sound can be amplified many times over.
It is also worth checking the distance to walls and furniture. A sound wave can bounce off surfaces, creating an echo or resonance effect. Vibration from a running motor is transmitted to the floor and walls, increasing the feeling of noise in the room.
Check the stability of the case. Gently shaking the arm may reveal instability. Vibration is transmitted to internal elements, tubes and shelves, causing them to rattle in time with the operation of the compressor. This creates a false impression that the cooling system itself is gurgling.
☑️ Diagnostics of refrigerator installation
Problems with the defrost system and drainage
In refrigerators with an automatic defrost system, the accumulation of water in the drainage system is a common cause of gurgling sounds. Water from melting ice should flow freely into the evaporator located above the compressor, where it evaporates. If this is the way, the water begins to splash and gurgle.
Clogged drain hole is the most common problem. Food crumbs, mold or ice blockage can block the channel. As a result, water accumulates at the bottom of the refrigerator compartment or in a groove, and makes sounds when the fan or vibration operates.
In winter, when the refrigerator is located on an unheated dacha or balcony, the drainage tube may freeze. The liquid inside it freezes, blocking the drain. When the defrost is turned on, the water cannot escape and begins to make noise inside the housing.
| Symptom | Probable cause | Solution method |
|---|---|---|
| Puddle under the drawers | Clogged drainage | Cleaning with a brush or warm water |
| Ice on the back wall | Faulty defrost heating element | Replacing the heater or timer |
| Noise only at night | Refrigerant circulation | Normal, does not require intervention |
| Gurgling and water on the floor | Displacement of the evaporator tray | Installation of the tray above the compressor |
To clean the drainage, you can use a special soft wire or a syringe with warm water. Careful flushing of the channel allows you to restore water flow and eliminate noise. If the problem repeats regularly, it may be necessary to replace the seals or check the operation of the heating element.
Lack or excess of refrigerant
If the refrigerator gurgles, but there is no cold or it does not freeze enough, this may indicate a freon leak. When the amount of refrigerant in the system decreases, the nature of its movement changes. Gas flows through the tubes at high speed, creating a whistling or loud gurgling sound.
Leaks often occur at the solder joints of the tubes or in the foamed part of the housing (evaporator). It is impossible to visually notice freon, since it is a colorless and odorless gas. However, oily spots around the connections can indicate the location of depressurization.
The opposite situation is an excess of refrigerant or the presence of air in the system (after poor-quality repairs). In this case, the compressor works overload, trying to push through a mixture of gases and liquids. At the same time, the sounds become dull, guttural and very loud.
⚠️ Attention: Independent refueling of the refrigerator with freon is prohibited and dangerous. Evacuation of the system and the use of specialized equipment are required.
The refrigerant level can be diagnosed only by indirect signs: the temperature of the condenser (grid at the back), the operation of the compressor and the presence of frost on the evaporator. If you hear gurgling and see that the freezer does not freeze meat in 2-3 hours, calling a technician is inevitable.
Faults in the compressor and start relay
The compressor is the heart of the refrigerator, and its operation is not always silent. Wear of internal valves, piston group or bearings can lead to unusual sounds. If the motor hums and gurgles at the same time, its tightness or lubrication may be broken.
The starting relay is responsible for starting the engine. If it is faulty, the compressor may hum but not start, or may start with a loud click followed by gurgling noise. Frequent attempts to start quickly damage the motor.
Vibration from a running compressor is transmitted to the copper tubes approaching it. If they touch each other or the body, resonance occurs. Often it is enough to simply bend the tube with your hand to eliminate the sound, but this must be done carefully so as not to damage the metal.
Check the motor mounts. Rubber shock absorbers dry out over time and lose their elasticity. As a result, the metal housing of the compressor begins to vibrate against the frame of the refrigerator, creating a low-frequency hum, which is perceived as part of the overall noise of the system.
When it is necessary to call a technician
There are a number of symptoms in which independent actions can only harm the equipment. If the gurgling is accompanied by a complete lack of cold, the appearance of an unpleasant chemical odor or sparking in the rear part of the unit, operation should be stopped immediately.
A technician will be required if you find mechanical damage to the tubes, swelling of the walls of the case, or if the refrigerator has been running continuously for days. In these cases, we are talking about complex breakdowns that require replacing components or evacuating the system.
Also, the help of a specialist is needed if, after defrosting and checking the installation, the problem does not disappear within 24 hours. Professional diagnostics using pressure gauges and leak detectors will allow you to accurately determine the cause of the noise and the cost of repairs.
Why does the refrigerator gurgle loudly immediately after turning on?
This is a normal process. When the compressor starts up, it creates high pressure, pushing refrigerant through the entire system. Liquid freon actively boils in the evaporator, creating maximum noise levels. After 10-15 minutes, when the pressure stabilizes, the sound should subside.
Can an empty refrigerator gurgle?
Yes, it can. The lack of food affects the acoustics inside the chambers. Empty space acts as a resonator, amplifying the sounds of the unit. In addition, the heat capacity of an empty refrigerator is lower, so the compressor can turn on more often, which increases the frequency of circulation sounds.
Does room temperature affect the sound?
Absolutely. In a hot room, the compressor works harder and longer to maintain the set temperature. This leads to more active circulation of the refrigerant and, accordingly, more frequent and loud gurgling. In winter, equipment is quieter in a cool room.
Is gurgling dangerous for food?
The sound itself is not dangerous. The reason that causes it is dangerous. If the gurgling noise is due to a freon leak or a broken thermostat, the temperature in the chambers may rise, leading to food spoilage. Monitor the temperature with a thermometer if the sounds alarm you.
Is it necessary to defrost the refrigerator when gurgling?
Scheduled defrosting (if the model is not No Frost) is useful in any case. It will help melt ice plugs in the drainage that may be causing the noise. For No Frost systems, complete defrosting is rarely required, but checking the drainage hole will not hurt.