When faced with unusual sounds emanating from kitchen appliances, any owner experiences anxiety. Gurgling sound in the refrigerator This is one of the most common complaints with which they turn to craftsmen or look for information on the Internet. This noise is often described as water pouring, gurgling or quiet gurgling, which can occur either immediately after switching on or during operation.
In most cases, such acoustic manifestations do not indicate a critical malfunction. Modern refrigeration systems are designed to circulate refrigerant, and noise can be a natural byproduct of this process. However, in order to distinguish normal operation from a harbinger of a breakdown, it is necessary to understand the physics of what is happening inside the camera.
Further analysis will reveal the true nature of the noise. We will look at the physics of motion Freon, problems with condensate drainage and possible malfunctions of the compressor unit. Understanding these mechanisms will help you make the right decision about the need to call a specialist.
Physics of the process: why refrigerant flows
The main reason why the refrigerator makes sounds reminiscent of liquid pouring lies in the principle of operation of the refrigeration circuit. Freon circulates inside the system, which constantly changes its state of aggregation. In the evaporator it boils, turning into gas and taking heat from the chambers, and in the condenser (on the rear grille) it becomes a liquid again, giving off heat to the room. refrigerant (freon), which constantly changes its state of aggregation. In the evaporator it boils, turning into gas and taking heat from the chambers, and in the condenser (on the rear grille) it becomes a liquid again, releasing heat into the room.
It is the movement of this mixture of gas and liquid through the thin tubes of the evaporator that creates the characteristic gurgling sound. When the compressor starts or, conversely, stops, the pressure in the system changes dramatically. At this moment liquid freon can flow through the tubes by gravity or under the influence of a pressure difference, creating a sound effectwhich can be heard even through the thickness of the housing insulation.
This effect is especially pronounced in models with the system No Frost. Here, the refrigerant circulates through a hidden evaporator, and sound insulation may be less effective at certain points where the tubes meet the body. If the sound is quiet, occurs periodically and is not accompanied by other symptoms, this is a variant of the norm.
The intensity of the noise may depend on the amount of gas filled. If there is not enough refrigerant in the system, the sound may become louder and more frequent, resembling a whistle or hiss along with gurgling. This is already a signal to check the tightness of the circuit.
Is this normal: when should you worry
It is important to be able to differentiate normal operating sounds from signs of an incipient malfunction. Engineering noise is allowed by manufacturers within certain limits. Usually this is a quiet hum, a rare crackling of the plastic when the temperature changes, and that very slight gurgling.
The alarm should be sounded if the nature of the sound changes. Loud gurglingwhich is heard in all rooms of the apartment, or sounds accompanied by vibration of the housing require attention. You should also be alert if there is a smell of burning or oil, which may indicate overheating of the compressor or a leak.
⚠️ Attention: If the gurgling sound is added to the lack of cold in the chambers, and the compressor works almost without interruption or, conversely, does not turn on at all, immediately unplug the device and call a technician.
A frequent cause of increased noise is incorrect installation. If the refrigerator is not level, vibration from the compressor is transmitted to the floor and walls, increasing the resonance of internal processes. Check the legs of the unit: it should be stable, not wobbling when you lightly press the corners.
Problems with the defrost system and drainage
Another common cause of extraneous sounds is water. During operation, condensation forms on the walls of the chamber and the evaporator, which in a working device flows into the drainage hole and evaporates in a special container above the compressor. If this process is disrupted, water can accumulate and create noise.
Clogged drainage is a common problem. Food crumbs, ice or mold block the drain, causing water to gurgle as it tries to pass through the narrow opening, or to drip from a height directly into the tray, creating loud sloshing sounds. In models with No Frost the drainage may freeze, creating an ice plug.
To check, you need to inspect the back wall of the refrigerator compartment. If you see puddles of water or ice in the bottom corner, a moisture drainage problem is confirmed. In this case, cleaning the channel is required.
☑️ Diagnostics of the drainage system
Also, the sound of flowing water may occur when the evaporator defrosts. In cyclic defrosting systems, the ice accumulated on the hidden evaporator melts and noisily flows into the pan. If this sound is too loud, the insulation may be damaged or the tubes may have become dislodged.
Malfunctions of the compressor and motor
The heart of the refrigerator - the compressor - can also be the source of gurgling sounds, especially if it is worn out. Inside the motor-compressor there is oil and refrigerant. During normal operation, they circulate silently, but when the valves or bearings wear out, the nature of the sound changes.
If you hear not just overflowing, but rather “plumping”, blows or loud slurping, this may indicate that liquid freon gets into the compressor cylinder instead of gaseous (hydraulic hammer) or the motor suspension inside has collapsed casing.
| Sound type | Probable cause | Need for repair |
|---|---|---|
| Quiet transfusion | Freon movement (normal) | No |
| Loud gurgling + vibration | Incorrect installation or wear of the suspension | Average |
| Splashing water and puddles | Clogging drainage | Low (you can do it yourself) |
| Gurgling + no cold | Freon leak or compressor breakdown | High |
It is important to note that replacement compressor is a complex procedure that requires evacuation of the system and charging with freon. It is almost impossible to carry out high-quality repairs at home on your own.
Is it possible to drive a refrigerator?
Transporting a refrigerator in a lying position often leads to oil leakage from the compressor into the refrigerant circuit. After such transportation, it is necessary to let the device stand vertically for at least 4-6 hours (or better yet, a day) before turning it on, so that the oil drains back. Switching on “cold” can lead to water hammer and valve breakage.
The influence of foreign objects and dishes
Sometimes the source of sound is not inside the mechanism at all, but in the chamber space itself. Glass bottles, jars of liquid, or internal contents that touch each other or the walls may gurgle, rattle, or resonate.
Check shelves and door pockets. The glass shelf may not lie tightly on the guides, creating resonance from the operation of the motor. Plastic containers with water that are on vibration also make sounds similar to gurgling.
Inspect the back of the refrigerator from the outside. If foreign objects are pressed against the condenser grille or tubes, or if the grille itself is deformed and vibrates, this also produces an acoustic effect. Simply move the refrigerator and check the gap against the wall.
What to do: step-by-step diagnostic instructions
If the sound starts to bother you, do not rush to call service. Conduct initial diagnostics yourself. This will help save time and money if the problem turns out to be trivial.
Listen first: is the sound constant or periodic? Is it coming from above, below or behind? Then check the stability of the unit. Try to shake the refrigerator slightly - it should not shake. If the legs are adjustable, twist them so that the front part is slightly higher than the back (for proper closing of the doors and drainage of water).
⚠️ Attention: Before any manipulations with electrical wiring or attempting to remove the back panel, be sure to disconnect the refrigerator from the power supply!
Next, check the temperature. If it is cold in the cells, the food does not spoil, and the ice does not freeze on the walls in a thick layer, most likely the equipment is working properly. If you notice that the refrigerator has begun to work longer than usual, and the noise has increased, this is a reason for a professional inspection.
Frequently asked questions and answers (FAQ)
Why does a new refrigerator gurgle louder than the old one?
Modern models often operate quieter in terms of motor noise, but due to the use of new types of refrigerants and thinner case walls, the sounds of freon circulation can be heard more clearly. In addition, in new systems No Frost fans and valves work more actively, creating an additional acoustic background that you need to get used to.
Can an empty refrigerator gurgle?
Yes, it can. The presence of products affects the heat capacity of the chamber, but not the physics of the compressor and the movement of gas through the tubes. However, a full refrigerator holds the temperature better, and the compressor can turn on less often, which subjectively reduces the number of audible sounds.
Is it dangerous if the sound appears suddenly?
The sudden appearance of loud extraneous sounds that were not there before is always a reason for attention. This may mean the tubes have shifted, the start of a freon leak, or compressor parts are worn out. If the sound does not go away within 24 hours or is accompanied by other symptoms, contact a specialist.
Does it need to defrost the refrigerator if it gurgles?
If the gurgle is caused by frozen drainage or excess ice on the evaporator (which often happens in systems Low Frost or when sensors are faulty), then complete defrosting for 10-12 hours may help resolve the problem. If the sound returns after defrosting, the reason is deeper.