The situation when the refrigerator is bubbling, especially immediately after you slam the door, causes natural concern among many owners of household appliances. This sound is often described as liquid pouring, gurgling, or even hissing coming from the depths of the unit. In most cases, there is no need to panic, since such acoustic phenomena may be part of the normal operating cycle of the cooling system.
However, loud and intrusive sounds should not be ignored either, because they can signal problems with circulation refrigerant or problems with drainage. Understanding the physics of the processes occurring inside the circuit will help you distinguish normal operation from warning signs of failure. Next, we will analyze in detail the mechanics of noise occurrence and diagnostic methods.
Physics of the process: circulation of refrigerant in the system
The main reason why the refrigerator is bubbling and makes sounds of flowing liquid lies in the peculiarities of the operation of the compression systems. Inside the tubes surrounding the body is freon, which constantly changes its state of aggregation. When you open the door, warm air enters the chamber, and sensors record an increase in temperature, starting the compressor.
At this moment, liquid refrigerant under high pressure begins to actively move through the capillary tube into the evaporator. It is this process of boiling and transition to a gaseous state that is often accompanied by a characteristic gurgling sound. If you hear that the refrigerator began to boil immediately after closing the door, this often means the start of a new cooling cycle.
The intensity of the sound directly depends on the type of refrigerant used and the design of the system. In modern models, circulation may be noisier due to the presence of fans and a complex air duct system. It is important to monitor whether the sound is constant or occurs only at certain moments of engine operation. No Frost circulation may be noisier due to fans and complex ductwork. It is important to monitor whether the sound is constant or occurs only at certain times when the engine is running.
⚠️ Attention: If the gurgling is accompanied by a strong hissing sound, similar to the release of gas under pressure, or a burning smell, immediately unplug the device. This may indicate depressurization of the circuit, which requires professional intervention.
It is also worth considering that after the compressor stops, the liquid in the tubes continues to flow under the influence of gravity and residual pressure. This is a natural process of equalizing pressure in the system, which can last several minutes. At this moment the refrigerator is bubbling even in the off state, which is not a sign of a malfunction.
The influence of opening and closing the door on the operation of the compressor
Why does the sound often intensify at the moment the door is closed? When you open the refrigerator, a large volume of warm air enters. The thermostat reacts to this with a sharp jump in temperature and gives a command to start the compressor at full power.
At this moment refrigerant begins to circulate at maximum speed. The sudden start of fluid movement through narrow tubes creates an acoustic effect that we perceive as seething. The longer the door was open, the more intense the system will work in the first minutes after it is closed.
- 🚪 A sharp change in pressure inside the chambers provokes active movement of gases.
- ❄️ Rapid cooling of incoming heat requires intensive work evaporator.
- 🔊 Vibration from a starting compressor can resonate with the tubes, amplifying the sound.
Particular attention should be paid to the tightness of the seal. If the door does not close tightly, the compressor will work almost non-stop, trying to compensate for the heat gain. In this mode the refrigerator is seething almost constantly, which indicates an increased load on the unit.
Check the condition of the magnetic tape around the perimeter of the door. If it becomes dirty or deformed, the seal is broken. Wipe the seal with a soft cloth and soapy water and make sure there are no gaps. This is a simple procedure that often reduces the frequency of switching on and, as a result, the noise level.
Problems with the drainage system and defrosting
One of the most common causes of gurgling sounds is water in the drainage system. In refrigerators with a No Frost or Low Frost system, the moisture that settles on the evaporator periodically thaws and must drain into a special tray.
If the drainage hole is partially clogged with crumbs, ice or mold, the water begins to accumulate and slowly seep, creating dripping sounds or transfusion. When you close the door, the change in pressure can “push” air pockets in the tube, causing a characteristic gurgling sound.
To fix this problem, you need to clean the drain. This can be done using a special brush or soft wire. Be careful not to damage the internal components of the evaporator. After cleaning, it is recommended to rinse the system with warm water.
☑️ Cleaning the drainage system
It is also worth checking the condensate tray, which is often located above the compressor. If it is overfilled or installed incorrectly, water may splash in it when the housing vibrates. Make sure that the tray is level and has no cracks.
⚠️ Attention: Do not use sharp metal objects to clean the drainage if you are not sure of your actions. A puncture of the evaporator tube will lead to a freon leak and costly repairs.
Improper installation and transportation of equipment
Often the answer to the question why the refrigerator is bubblinglies in a violation of the installation rules. If the unit is not level, a misalignment of the housing may cause uneven distribution of oil in the compressor or a change in the flow of liquid in the tubes.
Check the position of the refrigerator using a building level. Height adjustment is carried out using the front support legs. Correct installation ensures not only silence, but also the correct operation of the self-closing door system.
Another critical factor is transportation. If the refrigerator was transported lying down, oil from the compressor could enter the refrigerant circuit. In this case the refrigerator is bubbling due to the fact that the compressor is trying to pump a mixture of gas and oil.
| Type of violation | Symptom | Solution |
|---|---|---|
| Case distortion | Constant humming, noise when opening | Unscrew the legs to the level |
| Transport lying down | Strong seething, knocking | Stand vertically for 24 hours |
| Proximity to the wall | Resonance, increased vibration | Move 5-10 cm |
| Full tray | Water splashing during operation | Drain the water, check evaporation |
If you have just been brought in, let the equipment settle. The settling time depends on the season and method of transportation, but on average it ranges from 4 to 24 hours. This will allow the oil to drain back into the compressor crankcase.
How long exactly should you wait after transportation?
In the summer, 4-8 hours is enough. In winter, especially if the refrigerator is frozen, it is better to wait a full day in a warm room to avoid condensation inside the electronics.
When bubbling indicates a malfunction
Despite the fact that in many cases The refrigerator is bubbling for natural reasons, there are a number of signs indicating a breakdown. If the sound becomes louder, changes in pitch, or is accompanied by other anomalies, diagnostics is required.
One of the serious problems is a clogged capillary tube. In this case, the refrigerant cannot circulate freely, creating excess pressure in front of the blockage. This causes whistling or hissing sounds, which can be replaced by gurgling.
It is also worth paying attention to the work of the fan in the No Frost system. If ice is frozen on the blades or the bearing is worn out, the fan may make sounds similar to water pouring or friction. In this case, there is usually a deterioration in cooling.
- 🔊 The sound has become much louder than when purchased.
- 📉 The refrigerator has stopped freezing or is freezing too much.
- ⏱ The compressor is running without stops or turns on too often.
If you notice that the back wall of the refrigerator is covered with a “coat” of ice, and the bubbling sound does not stop, this is a sure sign of a violation of the defrost cycle or a freon leak. In such cases, independent repairs can be dangerous.
Noise prevention and proper care
In order to refrigerator work quietly and for a long time, it is important to follow simple operating rules. Regular defrosting (for drip systems) and de-icing helps maintain efficient heat transfer.
Make sure that food does not block the ventilation holes inside the chambers. Impaired air circulation causes the system to work in increased mode, which increases the load on the compressor and the noise level.
Periodically check the cleanliness of the condenser grille at the rear. Dust and animal hair impair heat transfer, causing the compressor to work longer. Cleaning with a vacuum cleaner once every six months will significantly extend the life of the unit.
⚠️ Attention: Do not put hot foods in the refrigerator. A sharp jump in temperature forces the compressor to reach maximum speed, causing severe bubbling and wear of parts.
Use silicone grease to treat door seals. This will maintain their elasticity and prevent the appearance of gaps through which the cold escapes. Soft closing of the door also reduces the risk of damage to the hinges and seal.
FAQ: Frequently asked questions
Is it normal for the refrigerator to seethe immediately after purchase?
Yes, this is normal. During the first transportation, oil may have entered the system. Let the refrigerator sit for 24 hours before turning it on. If the sound persists after this period, but the cold is produced normally, most likely this is a feature of the circulation of the refrigerant.
Why did the old refrigerator begin to seethe more strongly?
Over time, wear products may accumulate in the system, and the seals lose their elasticity. The refrigerant level may also have decreased due to micro-leaks. If the noise interferes with your life, you should call a technician to check the pressure in the system.
Can an empty refrigerator gurgle?
Yes, it can. An empty refrigerator cools faster and cycles may be more frequent. In addition, the absence of food reduces sound absorption inside the chambers, so all operating sounds become more audible.
Is bubbling dangerous if the refrigerator is freezing?
If the temperature in the chambers is stable and corresponds to the set one, and the sound is not accompanied by vibration of the body or smell, then, as a rule, there is no danger. This is the working process of freon flow.