The appearance of extraneous sounds in household appliances always causes concern, especially when it comes to refrigeration equipmentworking around the clock. The situation when inside the chambers or behind the back wall gurglesgurgles or makes the sounds of overflowing liquid is one of the most common reasons for contacting service centers. However, these sounds do not always indicate a breakdown.
In most cases, strange acoustic effects are associated with the natural physical processes of circulation refrigerant (freon) through the pipe system. Understanding the difference between the normal operation of the unit and the signs of a serious malfunction will help you avoid unnecessary expenses on calling a technician where you can get by with simple observation.
In this article we will analyze in detail the mechanics of the occurrence of sounds, analyze the symptoms of various malfunctions and determine in which cases murmuring requires immediate intervention from specialists repair.
Physics of the process: why liquid sounds are heard
The main reason why you can hear something overflows or gurgling in a working refrigerator lies in the principle of operation of the refrigeration circuit. The refrigerant, under high pressure, circulates through a closed system, changing from liquid to gaseous and back. It is this phase transition that is often accompanied by characteristic acoustic effects.
When liquid freon passes through a capillary tube and enters the evaporator, the pressure drops sharply and the substance boils at low temperatures. This process of boiling and subsequent movement of the vapor-liquid mixture through the tubes creates a sound reminiscent of pouring water into a bottle. This is especially audible in models with open circuits or when the compressor compartment is insufficiently soundproofed. murmur of a stream or pouring water into a bottle. This is especially audible in models with open circuits or when the compressor compartment is insufficiently soundproofed.
It is important to understand that the intensity of the sound can vary depending on the stage of the compressor operating cycle. When the engine starts or stops, the pressure in the system is equalized, which can also provoke short-term gurgling. If the sound is uniform and not accompanied by other alarming symptoms, this is considered normal for most modern models.
Key factors affecting the audibility of the process:
- 🔹 The type of refrigerant used and its amount in the system.
- 🔹 Design features of laying evaporator tubes.
- 🔹 Level of sound insulation of the compressor unit and housing.
- 🔹 Ambient temperature and load of chambers with products.
It is worth noting that in modern models with the system No Frost sounds may be less noticeable due to the operation of fans, which create constant background noise that masks the quiet murmur of freon. In older models or devices with a drip defrosting system, the acoustic effect may be more pronounced.
Is this normal: the differences between normal operation and malfunction
It is important for refrigerator owners to learn to distinguish operating sounds and signals for help from equipment. Normal gurglingusually occurs cyclically and subsides when the compressor stops. It is not accompanied by vibration of the case or a change in the temperature conditions inside the chambers.
⚠️ Attention: If the gurgling turns into a loud hissing or whistling, and oily spots appear on the back wall of the refrigerator, immediately unplug the appliance. This may indicate a freon or oil leak, which is dangerous to health and requires professional repair.
An alarm signal is a situation when the sound becomes constant, changes its tone, or is accompanied by other anomalies. For example, if the refrigerator gurgles loudly and does not turn off, working for wear and tear, this may indicate improper operation of the thermostat or problems with the temperature sensors.
It is also worth paying attention to the nature of the sound immediately after unplugging the device from the outlet. At this point, the pressure in the system equalizes, and the residual movement of the refrigerant can cause sounds for several minutes. If murmuring continues for hours after the unit has completely cooled down, this is a reason to carry out diagnostics.
To quickly assess the situation, use the following checklist of symptoms:
☑️ Diagnosis of refrigerator sounds
Possible malfunctions causing extraneous sounds
Although gurgling is often harmless, there are a number of technical problems that masquerade as normal operating noises. One of the common reasons is the entry of foreign objects foreign objects or debris into the system, as well as a violation of the tightness of the circuit.
If air or moisture gets into the system (for example, due to poor-quality previous repairs), the boiling process of the refrigerant becomes unstable. Moisture, freezing in narrow places of the capillary tube, creates plugs, overcoming which is accompanied by loud gurgling and even popping noises. This phenomenon is often called an “air lock” in the system.
Another reason may be a malfunction of the compressor itself. Wear of the valves or piston group leads to the fact that the motor begins to “triple” or work intermittently, driving uneven portions of refrigerant into the system. This causes chaotic fluid movement and increased acoustic effects.
A comparison table of symptoms will help determine the probable cause:
| Symptom | Probable cause | Need for repair |
|---|---|---|
| Quiet gurgling during operation | Freon circulation (normal) | Not required |
| Loud gurgling + does not freeze | Freon leakage or blockage | Urgent |
| Gurgling after defrosting | Water flow into drainage | Not required |
| Sound of transfusion + vibration | Incorrect installation | Adjustment |
Particular attention should be paid to models with two compressors. In them, sounds can occur in the circuit of one of the motors while the second one is operating normally. Sound localization (top or bottom, left or right) helps the technician quickly identify the faulty unit.
The influence of the defrosting system on acoustics
The automatic defrosting system No Frost or the drip system (Drop) make adjustments to the sound background of the refrigerator. In units with No Frost periodic gurgling is often associated with the removal of melt water. When the heating element turns off and the ice begins to melt, the water flows into the drainage tray located above the compressor.
When the water hits the hot compressor body or pan, it begins to evaporate rapidly. This process may be accompanied by a characteristic hissing sound or gurgling, especially if the tray is full or the drainage hole is partially clogged. The sound is reminiscent of the way oil sizzles in a hot frying pan when water gets in.
⚠️ Attention: If the gurgling sound is accompanied by the appearance of a puddle under the refrigerator, check the drainage hole. Its clogging leads to water overflowing over the edge of the tray and damage to the floor covering.
In drip refrigerators, water flows down the back wall during pauses in the compressor operation. If the stream does not fall into the center of the hole, but hits the edges or the ice plug, the sound of dripping or flowing water may occur, which users often describe as gurgling.
Why is it noisy after defrosting?
After manual or automatic defrosting, some moisture remains in the system. When the compressor is first started, this moisture may temporarily change the refrigerant circulation pattern or enter the drain, causing increased sounds. This usually goes away within 2-3 hours of operation.
Installation problems and external factors
Sometimes the reason that the refrigerator gurgleslies not in its internals, but in operating conditions. Incorrect installation is one of the most common factors that increases any operating noise of equipment. If the case is skewed, vibration from the compressor is transmitted to the floor and walls, resonating and creating the illusion of internal faults.
In addition, placing the refrigerator close to a wall or furniture can create an echo effect. The sound of refrigerant movement, which would normally be barely audible, is reflected from surfaces and becomes distinct murmuring. It is also worth checking whether the refrigerator pipes are not touching other objects.
The temperature in the room also plays a role. In hot weather, the compressor works harder, the refrigerant circulates faster, and the sounds become louder. This is especially true for models installed in the kitchen next to the stove or in direct sunlight.
To minimize external noise factors, follow these steps:
- 🔹 Level the refrigerator by tightening the adjusting feet.
- 🔹 Move the appliances away from the wall at least by 10 cm for free air circulation.
- 🔹 Make sure that inside the chambers the dishes do not come into contact with each other and the walls.
- 🔹 Check the stability of the floor at the installation site.
When you need to call masters
Despite the fact that many sounds are natural, there are clear criteria under which waiting on your own can lead to expensive repairs. If gurgling is accompanied by loss of cold, this is the main sign of a freon leak or compressor malfunction.
Another alarming signal is a change in the color or consistency of the oil, if you notice leaks. But even without visible traces, the combination of loud sounds, humming and equipment failure to freeze requires professional diagnosis. The technician will use a leak detector and pressure gauge to determine the pressure in the system and the presence of leaks.
Do not try to open the refrigeration circuit yourself or add freon by eye. This not only will not solve the problem, but may also permanently disable it. Modern refrigerants require precise dosage and evacuation of the system before refilling. compressor out of order. Modern refrigerants require precise dosing and evacuation of the system before charging.
Prevention and proper care
In order for your refrigerator to operate quietly and for a long time, it is important to follow the operating rules. Regular defrosting (for models without No Frost) prevents the formation of ice plugs, which can distort circulation sounds and impede the operation of the system.
Keep the condenser grille at the back of the refrigerator clean. Dust and pet hair accumulate there and impair heat transfer. The compressor begins to work more intensely and overheat, which leads to a change in the movement characteristics of the refrigerant and the appearance of new sounds.
It is also worth periodically checking the door seals. If they do not fit tightly, warm air enters the chamber, forcing the unit to work in increased mode. Constant load can lead to premature wear of the compressor valves and the appearance of a characteristic gurgling sound.
Frequently asked questions (FAQ)
Why does the refrigerator gurgle immediately after being plugged in?
This is a normal process when the refrigerant begins to circulate. At the moment of startup, the compressor creates pressure, and liquid freon begins to actively move through the tubes, which causes the sounds of overflow. Usually after 10-15 minutes the sound subsides or becomes background.
Can an empty refrigerator gurgle?
Yes, it can. The absence of products even increases the resonance of sounds, since empty shelves and chamber walls do not absorb vibration and acoustic waves as effectively as bulky products. Loading the refrigerator often makes its operation quieter.
Is it dangerous if a two-chamber refrigerator gurgles?
The sound itself is not dangerous. However, in two-chamber models the cold distribution system is more complex. If the sound appears suddenly and is accompanied by the fact that one of the chambers has stopped freezing, this is a sign of a malfunction of the damper or a leak in one of the circuits.
Does the brand of the refrigerator affect the strength of the gurgling?
Yes, it does. Models from different brands use different types of compressors and refrigerants. For example, some models Indesit or Atlant are known for more audible operation of the system than premium brands that pay great attention to noise insulation.