The situation when refrigerator ceases to maintain the set temperature, and strange gurgling sounds are heard inside, causes panic in any home cook. This is not just discomfort, it is a direct threat to the safety of products that can spoil in a matter of hours. Often, owners of units notice that the freezer compartment is still cold, but the main compartment is warm, or the equipment works continuously, but this is of no use.
Sounds reminiscent of water flowing or bubbling, combined with a lack of cold, indicate a circulation disorder refrigerant (freon) in the system. In normal operation, these sounds should be barely audible or absent altogether, unless we are talking about modern models with a No Frost system during defrosting. However, when noise becomes a constant companion to the operation of the compressor, and the temperature rises, it becomes impossible to ignore the problem.
It is important to understand that self-diagnosis has its limits, and deep repairs require the intervention of professionals with a license to work with gas. However, an initial analysis of the situation will help you understand the scale of the disaster and not overpay for the services of a repairman who may try to pass off a minor malfunction as a major repair of the entire system.
Physics of the process: why is seething heard
To understand the nature of the sound, it is necessary to consider the principle of operation of the refrigeration circuit. Refrigerant circulates through the system tubes, changing their state of aggregation from liquid to gaseous and back. In normal mode, this process occurs smoothly and quietly. The sound of bubbling occurs when a mixture of gas and liquid appears in the tubes, moving at high speed.
Most often the cause is a lack of freon. When the amount of gas in the system drops due to depressurization (leakage), the pressure drops and the refrigerant begins to boil earlier than expected, creating characteristic gurgling sounds. The compressor, trying to compensate for the lack of pressure, works to wear out, trying to push the remaining gas through the system.
Another reason may be a clogged capillary tube. In this case, the compressor pumps gas under high pressure, but it cannot pass through the narrow opening. An effect occurs when the gas noisily rushes through the plug, creating vibration and noise similar to pouring water. Refrigerator at this moment it may freeze slightly or not freeze at all.
How to distinguish a normal sound from an emergency one?
The norm is a quiet hum of the compressor and a rare, barely audible flow of liquid immediately after stopping the engine. An alarm is a constant, loud gurgling sound, audible even from another room, which does not stop during the entire operating cycle.
The main reasons for the lack of cold
If you are faced with the fact that refrigerator buzzes, gurgles, but does not freeze, there may be several reasons. These range from simple mechanical problems to complex technical faults. Accurate determination of the cause is the key to successful and inexpensive repair.
The first thing you should pay attention to is the work compressor. If it turns on, hums, but clicks and turns off after a few seconds, this may indicate the start relay or the motor is trying to start in a vacuum (without freon). If the motor runs continuously, but there is no cold, the problem is almost certainly a leak or a blockage.
It is also important to check the defrost system, especially in models No Frost. If the evaporator is clogged with ice, air does not circulate and food does not cool. In this case, the gurgling may be due to the melting of ice in the pan, which does not have time to evaporate or go into the drainage.
- 🔍 Freon leak: the most common reason that requires finding the place of damage and refilling.
- 🚧 Clogged capillary tube: disruption of the system due to oil breakdown products or moisture.
- ❄️ Malfunction of the thermostat: the sensor does not give a command to turn on the compressor, although it is warm in the chamber.
- 🔌 Electrical problems: oxidation of contacts, malfunction of the starting relay or motor windings.
Diagnostics of refrigerant leakage
Leakage freon is the “scourge” of modern refrigerators, especially those that use an evaporator foamed into the body. Over time, the metal of the tubes corrodes, or microcracks appear at the soldering points. It is almost impossible to notice a leak visually, since the gas is colorless and odorless.
One of the indirect signs of a leak is the condition of the condenser (the grille at the back of the refrigerator). Normally, it should be warm or hot evenly over the entire area. If you touch the grill and find that it is cold or warm only at the very beginning (at the compressor), and then cools down, this is a sure sign that Never try to look for a leak with an open flame! Freon, when in contact with fire, releases phosgene, a highly toxic gas that is dangerous to life. Use only soap solution or special leak detectors. gas has left the system.
⚠️ Attention: Never try to look for a leak with an open flame! Freon, when in contact with fire, releases phosgene, a highly toxic gas that is dangerous to life. Use only soapy water or special leak detectors.
Masters use nitrogen under pressure to check the tightness of the circuit. If the pressure drops, then there is a hole. Localization can take a long time, especially if the tubes are immured in polyurethane foam of the housing walls. In such cases, a decision is often made to install an external evaporator (“crying”), which is a temporary solution.
If the refrigerator was recently defrosted or transported, and then stopped freezing, the leak may have occurred at the site of mechanical damage. Check the back wall and bottom of the unit for dents or traces of oil, which often comes out along with gas from the depressurization point.
The problem of capillary tube clogging
The capillary tube is a thin copper channel that serves as a choke in the system, separating high and low pressure zones. Its diameter is so small that even a microscopic particle of oxide or hardened paraffin can completely block the flow of refrigerant.
The blockage is often formed due to moisture that entered the system during poor-quality repairs, or decomposition products of engine oil when the compressor overheats. The symptoms are very similar to a leak: refrigerator works constantly, the compressor is hot, the condenser is only partially warm, but there is no cold.
It is difficult to diagnose a blockage at home, but you can try the following method: turn on the refrigerator and touch it after 15-20 minutes of operation capacitor If it is hot only near the compressor (the first 10-15 cm), and the rest of the part is cold, this is a sign of a blockage. When there is a leak, the condenser is usually cold completely or warm unevenly, but along the entire length.
| Symptom | Freon leak | Clogged system |
|---|---|---|
| Condenser temperature | Cold or slightly warm | Hot at the beginning, cold later |
| Compressor operation | Works continuously or does not start | Works continuously, gets very hot |
| Sounds | Gurgling, hissing | Humming, lack of flow |
| Traces of oil | Often present | None |
Removing the blockage requires purging the system with nitrogen under high pressure, replacing the filter-drier and vacuuming. This is a complex procedure that requires special equipment (vacuum pump, pressure gauge station), so you can’t do it yourself.
Faults in the No Frost system
In refrigerators with the system No Frost The reasons for the lack of cold may lie in impaired air circulation. The evaporator in such models is located hidden, usually behind the rear panel of the freezer. If the fan stops moving air or the air ducts become clogged with ice, the cold simply does not reach the food.
Gurgling in this case may be associated with the operation of the defrost system. Water drains into the pan, but if the drain hole is clogged, the water may gurgle as it tries to escape or overflow. Check to see if a “fur coat” has formed on the back wall of the freezer. If you see ice, and the fan is humming or standing still, the problem is in the defrost system.
- 🌀 The fan is faulty: the motor hums, but does not spin due to frozen grease or a broken winding.
- 🔥 The defrost heating element has burned out: the ice does not melt, blocks the channels, the air does not passes.
- 🕰️ The defrost timer is faulty: the system does not switch to defrost mode.
- 🌡️ Defrost sensor: it gives incorrect readings, blocking the heating of the evaporator.
☑️ Checking the No Frost system
Often owners notice that after defrosting the refrigerator starts working normally for a day or two, and then stops freezing again. This is a classic sign of a faulty defrost system. Ice builds up again and blocks the operation of the unit.
Self-check algorithm
Before calling a technician, you can carry out a number of safe manipulations that will help more accurately describe the problem or, in rare cases, solve it. The main safety rule: unplug the refrigerator before any visual inspection of internal components.
Start by inspecting the compressor. If it is hot (more than 80-90 degrees) and the refrigerator is cold, this is a bad sign. Allow the equipment to cool for 2-3 hours. Then turn it on again. If after 15-20 minutes the condenser (grid at the back) does not heat up and the compressor is humming, a leak or blockage is likely.
Check the tightness of the door. Sometimes the problem is trivial: the elastic band has dried out or become dirty, warm air constantly enters inside, and the unit cannot cope. A simple test with a sheet of paper will help identify leaks: hold the sheet with a door and try to pull it out. If it pulls out easily without resistance, the rubber band needs to be adjusted or replaced. seal dried out or dirty, warm air constantly flows inside, and the unit cannot cope. A simple test with a sheet of paper will help identify leaks: hold the sheet with a door and try to pull it out. If it pulls out easily without resistance, the rubber band needs to be adjusted or replaced.
⚠️ Attention: Do not use sharp objects to remove ice from inside the chambers! A puncture of the evaporator will lead to an immediate leak of freon and expensive repairs, which are often not economically feasible.
If you find that the refrigerator is standing on an uneven floor, try leveling it. Misalignment can disrupt the operation of the compressor and the condensate drainage system, which also causes extraneous sounds and cooling problems.
When to call a specialist: critical signs
There are a number of signs in which further operation of the refrigerator is not only useless, but also dangerous. If you notice a black oily stain under the unit, immediately unplug it. This means that oil has leaked from the system and the compressor is running dry, which will lead to its wedge.
The smell of burning or burning wiring is another signal for immediate shutdown. This may indicate a faulty start relay that has overheated, or problems with the motor windings. Continuing operation can lead to a fire.
It is also worth thinking about calling a specialist if the age of the refrigerator exceeds 10-12 years, and the cost of the proposed repair (replacing the compressor, finding a leak in the foamed part) is more than 50% of the cost of a new analogue. In such cases, repairs often become economically unfeasible.
Remember that modern inverter compressors require complex diagnostics of electronics. Errors in the control board can simulate a malfunction of the entire system, although the problem can be solved by flashing or replacing the module.
Is it possible to add freon yourself?
No, this is impossible and dangerous. Freon is sold only to specialized organizations. Refilling requires evacuation of the system, precise dosage by weight (grams) and the use of the appropriate oil. Unprofessional refilling will lead to failure of the compressor.
How long does it take the refrigerator to gain temperature after defrosting?
Usually the process of reaching the mode takes from 2 to 6 hours, depending on the volume of the chambers and the ambient temperature. If after 8-10 hours of operation at maximum cooling power there is no cold, this is a malfunction.
Why was the refrigerator not turned on immediately after transportation?
During transportation, oil from the compressor could get into the cooling circuit. If you turn on the unit immediately, a water hammer or clogging of the capillary tube with oil is possible. It is necessary to allow the equipment to stand vertically for at least 4-8 hours.
Is gurgling dangerous for food?
Gurgling itself is not dangerous, but it signals that the temperature regime has been disturbed. Food in a warm chamber begins to deteriorate and bacteria multiply. Until the cause is eliminated, you cannot store food in such a refrigerator.
Can a new refrigerator gurgle?
In the first hours of operation, a new refrigerator may make various sounds, including gurgling, as the system is initially filled with refrigerant and the processes are stabilizing. If the sounds do not go away after a day, this is a reason to contact the service.