The situation when something is boiling in the refrigerator is familiar to many owners of household appliances. This specific sound often frightens users into thinking about serious damage or even a fire inside the case. In fact, the gurgling and noise of flowing fluid can be either normal or a sign of a malfunction of the cooling system.
It is important to immediately determine the nature of the sound: is it a quiet flow or a loud, intrusive bubbling? The further strategy of action depends on this. Refrigerantcirculating through the tubes creates natural noise when the state of aggregation changes, but if the sounds become sharp and constant, it is worth conducting diagnostics.
In this article we will analyze all possible causes, from safe physical processes to critical malfunctions compressor or evaporator. Understanding the nature of sound will help you avoid unnecessary expenses for repairs or, conversely, call a technician in time.
Natural processes: why does a refrigerator make sounds
Modern models of refrigeration equipment, be it Indesit, Bosch or LG, are designed taking into account acoustic comfort, but completely silent devices do not exist. The main source of sound is the movement of the working fluid (freon) along the system circuit. When liquid refrigerant enters a low pressure zone, it boils, turning into gas. It is this boiling process that you can hear as a quiet gurgle.
The sounds are heard especially clearly immediately after the compressor is turned on or when it stops. At this time, the pressure in the system equalizes, and the remaining liquid flows into the lower sections of the circuit. If the sound occurs periodically and is not accompanied by other alarming symptoms, such as lack of cold, then this is normal operation.
However, it is worth paying attention to the intensity of the noise. If the refrigerator used to work quietly, but now it “boils” constantly and loudly, this may indicate a change in operating parameters. Vibration pipes or poor-quality installation can also enhance the natural sounds of freon circulation.
⚠️ Attention: Natural gurgling is usually quiet and periodic. If the sound has become loud, similar to pouring water in a bucket, and continues without interruption, this is a cause for concern.
Technical characteristics of modern inverter compressors suggest smoother, but sometimes more audible operation at low speeds. Unlike older linear models, they can create a background hum, which users sometimes confuse with boiling.
Malfunctions of the defrost and drainage system
One of the common reasons why something boils or gurgles in the refrigerator is a problem with the drainage of melt water. In No Frost and drip-type systems, condensate flows into a special tray located above the compressor. If the drain hole is clogged, water begins to accumulate inside the chamber or under the evaporator.
When a hot compressor heats the tray, the water in it may boil, creating characteristic sounds. But more often the problem lies in the fact that water drips directly onto the hot parts of the motor or tube, making hissing and gurgling noises. This is not only noisy, but also dangerous for electrical contacts.
A blockage can form due to the ingress of crumbs, mold or ice jam. Warm water or special brushes are often used for cleaning. It is important not to damage the internal walls evaporatoras this will lead to freon leakage.
- 🔍 Check the back wall of the refrigerator compartment for ice or puddles.
- 💧 Pour some warm water into the drainage hole to check permeability.
- 🧹 Use a soft wire or a special cable to clean the channel.
- 🌡️ Make sure that the products do not block the ventilation holes.
If the drainage system is in order, but the water is still gurgling somewhere, there may be a failure in work Defrost heating element. It may not turn on on time, which is why excessive ice freezes, which, when defrosted, produces a lot of water that does not have time to evaporate.
☑️ Diagnostics of the drainage system
Problems with the refrigerant and capillary tube
A more serious cause of noise is poor circulation freon. If the system has a blockage in the capillary tube (often due to moisture or oil breakdown products), the refrigerant cannot circulate freely. The compressor tries to push the gas, creating high pressure, which is accompanied by loud boiling and whistling.
The blockage can be technical (clogging of the filter drier) or icy (moisture entering the system). In both cases, the cooling efficiency drops, and noise becomes a constant companion to the operation of the unit. Capillary tube has a very small diameter, so even a microscopic particle can disrupt operation.
Another option is a refrigerant leak. When freon becomes scarce, it begins to boil ahead of time and more intensely, creating a “boiling” effect. In this case, the refrigerator may work without stopping, trying to gain temperature, but does not hold the cold.
| Symptom | Probable cause | Sound character | Solution |
|---|---|---|---|
| The refrigerator does not freezing | Freon leak | Loud bubbling, hissing | Looking for leaks and refilling |
| The compressor is hot | Clog capillary | Whistling, humming, boiling | Purge the system, replace the filter |
| Frost on the back wall | Sensor malfunction | Periodic gurgling | Replacing the thermostat or sensor |
| Water inside the chamber | Clogged drainage | Splashing, squelching | Cleaning the drainage hole |
⚠️ Attention: Independent work with the refrigerant circuit is prohibited without a license and equipment. Freon is under pressure, and soldering tubes requires skills. If you suspect a leak or blockage, call a technician.
Why can't you ignore the blockage?
If you ignore the blockage of the capillary tube, the compressor will work with overload, trying to overcome the resistance. This will lead to overheating of the windings, thermal shock and eventual combustion of the motor, which is much more expensive to repair than cleaning the system.
Compressor malfunctions
The heart of the refrigerator is compressor. If this unit is faulty, the sounds can be very different: from a humming sound to a clear boiling of the oil inside the crankcase. This happens when the tightness of the valves is broken or the moving parts of the mechanism wear out.
In some cases, the oil in the compressor may foam due to freon or moisture getting there. When the piston group operates, such an emulsion creates the feeling that something is boiling inside. This is often accompanied by the release of oil into the system, which leads to blockage.
It is also worth checking the compressor mountings. If rubber shock absorbers become dry or burst, vibration is transmitted to the body and tubes, amplifying any sounds. In older models Atlant or Biryusa this is a common problem.
Motor diagnostics require measuring current and discharge pressure. If the current is high and the pressure is low, the problem is most likely in the valves or mechanical wear. In this case, the unit needs to be replaced.
- 🔊 Listen: does the sound come from the motor itself or from the tubes at the back?
- 🌡️ Touch the compressor: it should be hot, but not scalding.
- 👀 Inspect the tubes for oily stains (a sign of oil leakage).
- ⚡ Check the start relay for carbon deposits or odor burning.
The influence of operating mode and loading
Sometimes the answer to the question “why is something boiling in the refrigerator” lies not in a breakdown, but in improper operation. Overloading the chamber with products disrupts air circulation. Cold air cannot freely wash the evaporator, which leads to local hypothermia and a change in the nature of freon boiling.
In addition, placing hot foods in the refrigerator causes a sharp jump in the load. The system begins to operate in extreme mode, the refrigerant boils more intensely to remove heat. This creates an acoustic effect similar to seething.
It is important to follow the rules for placing products. Do not place pans close to the back wall where evaporatoris located. Leave a gap for ventilation. Also check whether bottles or cans are leaning against the walls, creating resonance.
If you have just defrosted the refrigerator and turned it on, immediately loading it full, the boiling sound will be increased. Let the unit run idle for 1-2 hours to stabilize the temperature.
When you need to call a technician
Understanding the line between normal and breakdown will save your budget. If the gurgling noise is quiet and intermittent and the refrigerator is freezing, the equipment is most likely working properly. But there are a number of signs that require professional intervention.
First of all, you need to sound the alarm if the absence of cold is added to the sounds. If it’s warm in the chamber and something is boiling loudly in the back, it’s almost guaranteed to be a leak or a blockage. A technician is also needed if the compressor runs non-stop, without turning off for hours.
The appearance of an unpleasant smell of burning or oil, sparking in the area of the motor are signs of a critical malfunction. In such cases, you must immediately disconnect the device from the network and call a specialist.
⚠️ Attention: Do not try to solder the tubes yourself or open the circuit without a vacuum pump. The entry of moisture or air into the system will permanently damage the refrigerator.
Modern refrigerators with electronic control can display error codes on the display. If you see flashing lights along with strange sounds, check the instructions. Often the code directly indicates a malfunction of the sensor or fan.
Is it possible to use the refrigerator if it gurgles?
If the refrigerator maintains its temperature and the sound is not accompanied by a burning smell or knocking out plugs, short-term operation is possible. However, prolonged operation with a malfunction (clogging, leakage) will lead to combustion of the compressor. It is better to carry out diagnostics.
Why does a new refrigerator make boiling sounds?
New equipment often goes through a “break-in” period. The oil in the compressor is distributed, the seals are rubbed in. A quiet gurgling sound during the first weeks of operation is normal. If the noise does not subside after a month, contact service.
Is loud gurgling harmful to food?
Sound itself does not affect the quality of food. What is dangerous is what lies behind the sound: if due to a malfunction the temperature in the chamber rises above +5°C, the food may spoil. Monitor the temperature with a thermometer.
How to distinguish the sound of water from the sound of freon?
The sound of flowing water (condensation) is usually more dull and different, often heard only when the refrigerator is tilted or immediately after defrosting. The sound of freon is louder, similar to pouring sand or hissing, and is synchronized with the operation of the motor.
Do you need to change freon if it is just noisy?
Freon is a closed system. It is not consumed like fuel in a car. If there is not enough freon (there is a leak) or it is dirty, then refilling is needed. You can’t and don’t just “add” freon for the sake of silence.