The sudden appearance of extraneous noise in the operation of household appliances often becomes a cause for serious concern. If your the refrigerator is squelching, this can signal both normal physical processes and an incipient malfunction. Understanding the nature of sound is the first step to preserving the expensive equipment and products stored inside.
In most cases, the sounds of overflowing liquid are associated with the circulation refrigerant (of freon) through the piping system. However, sudden changes in the acoustic background cannot be ignored. It is necessary to analyze in detail the physics of the process and distinguish normal operation from critical situations that require the intervention of a specialist.
Often users confuse natural gurgling with signs of breakdown. To avoid unnecessary panic or, conversely, not to miss a serious problem, it is important to take into account how long ago the noise appeared, its intensity and accompanying symptoms, such as changes in temperature in the chambers.
Physics of the process: why freon flows
The main reason why the refrigerator makes sounds reminiscent of water pouring lies in the principle of operation of the compression system. Refrigerant, circulating in a closed loop, constantly changes its state of aggregation. When passing through the capillary tube and entering the evaporator, liquid freon boils at low pressure, turning into gas.
It is this process of boiling and movement of the mixture of liquid and gas that causes the characteristic gurgle. In modern models, especially with the No Frostsystem, these sounds can be heard more clearly due to the design of the air ducts and the location of the compressor. Often the sound intensifies immediately after stopping the motor, when the pressure in the system is equalized and the remaining liquid flows into the lower part of the circuit.
⚠️ Attention: If the gurgling is accompanied by strong heating of the side walls of the housing or motor, this may indicate a violation of heat transfer or excessive load on the compressor. In such a situation, operation requires caution.
The intensity of the sound directly depends on the type of refrigerant used and the design of the evaporator. In older models with open evaporators, the noise could be less noticeable, while modern aluminum or steel plates can act as resonators, enhancing acoustic effects.
Is this normal: normal sounds vs malfunctions
It is important to clearly separate operating noises and signals of a breakdown. If the refrigerator begins to squelch immediately after defrosting or being plugged in after a long period of inactivity, this is absolutely normal. The system fills with refrigerant and active circulation causes noise. Also, a short-term gurgling is typical when the compressor is turned off.
The alarm should be sounded if the nature of the sound changes to a (constant) hum with overflows, which does not stop even in rest mode. Another sign of a problem is if the lack of cold is added to the soundtrack. In this case freon circulation may be disrupted by a blockage or leak, and the compressor runs idle, trying to gain pressure.
Let's consider the main differences between normal and pathology:
- 🔊 Normal: Quiet gurgling lasts 1-3 minutes after stopping the engine, the temperature in the chambers is stable.
- ❄️ Normal: The sound appears periodically, cyclically, coinciding with the operation of the compressor.
- 🌡️ Pathology: The refrigerator is squelching constantly, but the food has stopped freezing or, conversely, deteriorate from the heat.
- 🔌 Pathology: The engine hums, tries to start, gurgling is heard, but after a few seconds a click is heard and it turns off.
Particular attention should be paid to models with two compressors. In them, sounds can come from different parts of the body, which sometimes confuses owners. If one of the circuits is not working correctly, the sound may be asymmetrical or have a different tonality in the freezer and refrigerator compartments.
Problems with the condensate drainage system
Often the reason that something gurgles and squishes in the refrigerator is not the refrigerant at all, but ordinary water. During operation, condensation forms on the evaporator, which must be removed through a special drainage system. If this process is disrupted, water accumulates and makes sounds when the case vibrates or the fan operates.
The main problem lies in clogging of the drainage hole. Food crumbs, mold or ice blockage is blocking the channel through which moisture should drain into the evaporation tank on the rear wall (above the compressor). Water accumulates at the bottom of the refrigerator compartment or in the groove, and when the door is opened or vibration, a characteristic squelching sound is heard.
To check the condition of the drainage, you must:
- Inspect the bottom of the refrigerator compartment for the presence of puddles.
- Find a drainage hole (usually on the bottom rear wall).
- Check its permeability using a soft wire or brush.
If the problem is an ice plug, you will need to completely defrost the unit for at least 24 hours. The use of sharp objects to clean the channel is strictly prohibited, as there is a high risk of damaging the thin evaporator tubes, which will lead to expensive repairs.
☑️ Diagnostics of the drainage system
The influence of the No Frost mode on acoustics
Owners of equipment with the system No Frost (or Low Frost) are often faced with a more diverse palette of sounds. Not only refrigerant circulates here, but also air. Fans driving cold currents through air ducts can create a noise similar to squelching if ice has formed on the blades or in the channels.
Violation of the evaporator defrost cycle in such systems leads to the fan becoming overgrown with ice. The blades begin to touch the ice crust, producing crackling, crunching or gurgling sounds of melting water. This happens if the thermostat or defrost timer has failed. Defrost heating element, thermostat or defrost timer.
Critical signs of a malfunction in the No Frost system:
- 💨 The fan hums unevenly, sometimes increasing, sometimes dying down.
- 🧊 A layer of snow or ice is visible on the back wall of the freezer.
- 📉 The temperature in the chambers no longer corresponds to the set values.
⚠️ Attention: Replacing the heating element or timer yourself in No Frost systems requires disassembly rear panel and dismantling the evaporator. Without electrical skills and knowledge of the circuit diagram of your model (Indesit, Bosch, Samsung), it is better not to take risks.
It is also worth considering that in some models the sound of dripping water after the defrost cycle is standard. The water flows into the pan, which is heated by the heat of the operating compressor, and the evaporation process may be accompanied by hissing or slight gurgling.
When it’s time to call a technician: leak diagnosis
The most serious scenario in which the refrigerator squishes is a refrigerant leak. If a hole (microcrack) has formed in the circuit, freon begins to escape and the pressure drops. The compressor tries to compensate for the loss by working non-stop, and the mixture of gas and oil makes loud, unusual sounds.
It is difficult to diagnose a leak on your own, but there are indirect signs. In addition to noise, pay attention to the operation of the motor. If it hums continuously, without turning off for hours, and the temperature inside does not drop below +10°C, the likelihood of a leak is high. Also, frost may appear on the compressor tubes or, conversely, they remain absolutely cold.
Is it possible to add freon yourself?
Self-charging of refrigerant is impossible without special equipment (vacuum pump, pressure gauge station, scales). In addition, you cannot simply “top up” gas - the system requires evacuation and precise dosage by weight. An attempt to refuel “by eye” will lead to rapid breakdown of the compressor.
The table below shows comparative characteristics of sounds for different types of faults:
| Sound type | Probable cause | Associated symptoms | Urgency of repair |
|---|---|---|---|
| Quiet gurgling after switching off | Normal freon circulation | Temperature is normal | Not required |
| Loud squelching + puddle | Drainage clogged | Water on the floor or bottom of the chamber | Medium (you can do it yourself) |
| Gurgling + fan crackling | Ice on the fan (No Frost) | Snow on the back wall | High |
| Constant hum + no cold | Freon leakage | The motor is hot, does not turn off | Critical |
If you suspect a leak, immediately disconnect the device from the network. Further operation of the compressor in a vacuum (in vacuum mode) burns its windings, turning the repair into replacing the entire unit.
Preventive measures and proper care
To minimize the risk of extraneous noise and extend the life of the equipment, it is necessary to follow the operating rules. Regular maintenance allows you to identify problems at an early stage, when their elimination does not require large expenses.
First of all, keep the condenser grid at the back of the refrigerator clean. Dust and animal hair impair heat transfer, causing the compressor to work harder, which increases the load on the circulation system and can increase acoustic effects. Cleaning should be done every six months.
It is also important to install the refrigerator correctly. It must stand strictly horizontally. Check this with a building level. If the legs are not twisted correctly, vibration from the compressor is transmitted to the housing and piping, causing resonance and increasing the sound of flowing fluid. Use anti-vibration pads under the supports.
Do not overload the chambers with products. Too dense packing interferes with air circulation (especially in No Frost), which leads to local hypothermia, the formation of excess condensate and, as a result, problems with its drainage and the appearance of squelching sounds.
Frequently asked questions (FAQ)
Why did the new refrigerator start to squelch a week after purchases?
Most likely, this is the process of grinding in the system. In new models, the oil in the compressor may be more viscous, and the refrigerant circulates more actively. If the temperature remains stable, there is no need to worry. Let the equipment operate normally for 2-3 days.
Can the noise level depend on the amount of products inside?
Yes, indirectly. Shelves and products act as sound absorbers. In an empty refrigerator, sounds resonate more strongly. In addition, if you have loaded a lot of warm products, the compressor will work longer and more intensely, increasing the sounds of freon circulation.
Is the refrigerator squelching and not freezing - is this definitely a leak?
In 90% of cases, the combination of these two symptoms indicates a freon leak or a serious blockage of the capillary system. Compressor failure (loss of performance) is also possible. Professional diagnostics with a pressure gauge are required.
Is it dangerous to continue to use the refrigerator if it gurgles?
If it is just the sound of liquid pouring and the cold persists, it is not dangerous. If there are signs of overheating of the motor, a burning smell or lack of cooling, operation must be stopped to avoid a fire or failure of the equipment.