Discovering that The refrigerator has stopped freezingoften causes panic, but the first step is to analyze the situation. If the motor is running without stopping, and it’s warm inside, there is a high probability of a leak in the circuit. Refrigerant leak This is not just a breakdown, it is a physical process that requires immediate intervention to preserve expensive equipment.
In this article we will look at how to independently identify the problem before the technician arrives, why replacing freon does not always resolve the issue, and what hidden risks are associated with operating a unit with a damaged circuit. Ignoring the first signs can lead to combustion of the compressor, the repair of which will cost much more.
Modern models, be it Indesit, LG or Atlant, use different types of refrigerants, but their operating principles are similar. The loss of even a small amount of gas disrupts the thermodynamic cycle, turning the refrigerator into an ordinary cabinet. Understanding the physics of the process will help you make the right decision on further actions.
How the cooling system works and why gas escapes
The basis of the operation of any refrigeration unit is a closed circuit through which it circulates refrigerant. Under the action of a compressor, the gas is compressed, heated, then passes through a condenser, where it cools and turns into liquid. Further, passing through the capillary tube and evaporator, the refrigerant expands sharply and boils, actively absorbing heat from the chambers.
The system is designed to be absolutely sealed. Under normal conditions freon it is not consumed and does not require refilling during the entire service life of the device. If you are faced with the need to add gas, it means depressurization has occurred. This can happen due to mechanical damage, metal corrosion or manufacturing defects in soldering.
It is important to understand that freon leakage is a process that will not stop on its own. The pressure in the system drops, the compressor tries to compensate for the lack of cold by working non-stop. This leads to overheating of the motor windings and eventual failure of the very heart of the refrigerator.
⚠️ Attention: Some modern refrigerants (for example, R600a) are explosive at a certain concentration in the air. If you smell solvent or gas, immediately ventilate the room and exclude sources of open flame.
Corrosion is a hidden enemy that often affects the evaporator in models with the No Frost system or crying type of defrosting. Moisture, condensation and aggressive food components can take years to destroy the thin walls of the tubes. At some point, the microcrack turns into a fistula, and the gas begins to escape.
Main signs and symptoms of refrigerant loss
Diagnosis of a leak often begins with a visual inspection and analysis of the behavior of the equipment. The first sign is a change in operating mode: the refrigerator turns on more often than usual or does not turn off at all. The compressor hums continuously, trying to reach the set temperature, but heat transfer does not occur in full.
Pay attention to the freezer compartment. If a “fur coat” has formed there only in one corner or, conversely, the food has begun to thaw while the engine is running, this is a sure sign lack of freon. In two-compressor models, the problem may be localized in one of the circuits, while the second will work properly.
Another symptom is the appearance of swelling on the side walls of the case. This occurs when oil that has left the system along with the gas accumulates in places where the thermal insulation is peeled off. Oil stains may also appear near the compressor or in the lower part of the unit, which indicates a break in the circuit.
- 🧊 The compressor runs constantly, but does not cool properly way.
- 💧 Oily traces are visible on the floor under the refrigerator or on the rear grille.
- 🔊 Change in the sound of the engine: the appearance of hissing or gurgling.
- ❄️ Uneven freezing of food or lack of ice in the freezer.
Sometimes a leak is accompanied by a specific smell. Although freon itself is often odorless, oil or insulation decomposition products may come out with it. If you smell burning or chemicals, this is a reason to immediately turn off the device unplug.
How to check a refrigerator for freon leaks yourself
Before calling a technician, you can carry out an initial diagnosis. The simplest method is tactile. Run your hand along the side walls of the operating refrigerator. Normally, they should be warm (at the points where the condenser passes through). If the walls are cold over the entire area, the gas may have completely left the system.
For a more accurate check, use a soap solution. Apply thick foam to suspected leak areas: pipe joints, sealed seams, compressor area. If after 5-10 minutes bubbles appear on the surface, it means that the gas is escaping. This method is effective only if there is residual pressure in the circuit.
☑️ Primary diagnosis
There is also a test method using special detectors, but they are rarely found in everyday life. However, if you are familiar with automotive equipment, you can try to find the leak with ultraviolet light, after adding a phosphor to the system. But this is already a task for professionals.
Do not forget about visual inspection internal cameras. If you see rust on the back of the freezer or blistering plastic, this may indicate that the evaporator has rotted away from the inside. In such cases, repairs often become economically unfeasible.
⚠️ Attention: Never try to look for a leak using an open flame (lighter). This is not only useless for detecting most modern gases, but also deadly due to the risk of explosion or poisoning by freon combustion products.
Typical places of depressurization of the refrigeration circuit
Statistics of service centers show that there are vulnerable places where leaks occur most often. Knowing these zones will help the technician localize the problem faster. The evaporator suffers first, especially in models with automatic defrosting, where heating and cooling cycles alternate constantly.
Second place is occupied by the soldering of copper tubes. If during assembly at the factory the technology was violated or low-quality solder was used, microcracks will form over time. The vibration of a running compressor only accelerates this process, destroying the connection.
The third common reason is mechanical damage during transportation or careless defrosting. When you beat the ice with a knife, it is very easy to break through the thin wall of the evaporator. At this moment, a characteristic hissing sound is heard, and freon begins to rapidly evaporate.
| Leak location | Cause of occurrence | Difficulty of repair | Probability of success |
|---|---|---|---|
| Evaporator (inside) | Corrosion, mechanical shock | High | Medium (depending on access) |
| Condensate drain pipe | Vibration, bend | Low | High |
| Shut-off valves | Manufacturer's defects, aging rubber | Medium | High |
| Compressor (oil seal) | Wear, overheating | High (replacement of unit) | High |
It is also worth mentioning the so-called “thermal” leaks. They occur where the tubes pass through the defrost heating elements. A constant temperature difference thins the metal, and sooner or later a through hole forms.
Is it possible to seal a hole in a tube?
Self-sealing with epoxy or cold welding will only give a temporary effect. System pressure and vibration will quickly destroy the patch. In addition, without vacuuming, moisture will remain inside, which will turn into an ice plug and block the system.
Consequences of operation and is it possible to use the refrigerator
Many users wonder: is it possible to continue using the refrigerator if it has stopped freezing, but seems to be working? The answer is clear: operation is prohibited. Operating the compressor without proper cooling (which is provided by circulating freon) leads to its overheating.
In the best case, the thermal protection relay will work and the engine will simply turn off. In the worst case, a breakdown of the winding or jamming of the piston group will occur. Replacing a compressor is one of the most expensive repair procedures, often accounting for up to 70% of the cost of a new device.
In addition, food in a warm chamber begins to deteriorate, releasing moisture. This creates an ideal environment for bacteria and mold to grow, which are then difficult to remove from insulation and plastic parts. The smell of spoiled food can be permanent.
If the leak is due to corrosion, the process may continue. Moisture that gets inside the system when operating on “discharged gas” will cause the formation of acids that will corrode the compressor from the inside. Therefore timely shutdown saves not only money, but also the equipment itself.
- 🔥 Risk of compressor combustion due to overheating of the windings.
- 🦠 Spoilage of food and the spread of bacteria throughout cameras.
- 💸 Increased cost of repairs (from gas replacement to motor replacement).
- ⚡ Increased wasted energy consumption.
⚠️ Attention: Even if the refrigerator freezes, but weakly, do not try to turn the thermostat to the maximum. This will create excess load on the system and accelerate compressor failure. It is better to immediately diagnose the cause.
The process of eliminating leaks and recharging refrigerant
Repairing a system with a leak is a complex technological process that cannot be performed at home without special equipment. The technician must find the place of depressurization, eliminate it and completely recharge the circuit. You cannot simply “add gas,” since it is unknown how much of it is left and whether there is air or moisture in the system.
The first stage is searching for a leak. If it was not possible to find it visually or with a soap solution, the technician can pump nitrogen into the system under high pressure and lower the unit into a bath of water. Air bubbles will accurately indicate the location of the damage. After this, the damaged area is sealed or the entire assembly is replaced.
Next comes the most important stage - vacuuming. Using a vacuum pump, air and moisture vapor are removed from the system. This must be done because the water in the system will freeze in the capillary tube, forming an ice plug that will block circulation. Evacuation time can take from 30 minutes to several hours.
Only after creating a vacuum is done refilling with freon. The amount of refrigerant is strictly regulated by the manufacturer and is indicated on a sticker on the back of the refrigerator. Refueling is carried out on scales with an accuracy of grams. Excess or lack of gas is equally harmful to the operation of the unit.
At the end of the procedure, the technician checks the tightness of the connections and controls the cooling temperature in the chambers. If all the parameters are normal, the refrigerator is left to work for several hours for a final check.
Frequently asked questions (FAQ)
How much does it cost refilling the refrigerator with freon?
The cost consists of the work of the technician, the cost of gas and consumables. On average, together with leak detection and evacuation, the procedure can cost from 3,000 to 6,000 rubles and more, depending on the model and the complexity of access to the evaporator. The technician will tell you the exact price after diagnostics.
Is it dangerous to breathe freon vapors?
In small quantities that can be released when a household refrigerator is depressurized, freon is not toxic to humans. However, it displaces oxygen, so in a small, unventilated room it can cause suffocation. When in contact with an open fire, freon can decompose into toxic substances, so you should not smoke near a leaking refrigerator.
Is it possible to fill a refrigerator with freon yourself?
Theoretically, it is possible if you have equipment (cylinder, scales, vacuumizer, pressure gauges), but in practice it is difficult. Without removing moisture and air from the system, the refrigerator will not work properly. In addition, you may not find the leak, and the gas will come out again in a couple of days.
How often should you change the freon in the refrigerator?
In a working, sealed refrigerator, change the freon you should never. It circulates in a closed loop and is not consumed. If you are offered a “preventative” refill without symptoms of a leak, this is a sign of the technician’s dishonesty.
Why does the refrigerator freeze but does not turn off?
This is a classic sign of a partial freon leak. The power of the remaining gas is enough to create cold, but the cycle is not completed completely, the temperature sensor does not record the required value and does not give a command to turn off the compressor. Diagnostics of the circuit is required.