A decrease in cooling efficiency or complete absence of cold in the fridge compartment Indesit often indicates a critical drop in the refrigerant level. Owners of household appliances are faced with a situation where the compressor runs continuously, and the products begin to deteriorate. This is a sure sign that a microscopic crack or depressurization has formed in the system.
The process of restoring the functionality of the unit requires not just adding gas, but an integrated approach to diagnostics. Refilling freon is a technically complex process that cannot be performed without specialized equipment and knowledge of gas physics. Attempts to solve the problem “by eye” can lead to failure of an expensive compressor.
In this article we will analyze in detail why leaks occur, what types of refrigerants are used in modern models Indesit, and describe a professional algorithm of actions. You will learn what tools the master needs and why self-refilling without eliminating the cause of the leak is a pointless waste of time and money.
Causes and symptoms of refrigerant leaks
The main reason for the disappearance of freon from the cooling circuit is mechanical damage or metal corrosion. Aluminum evaporators, often installed in budget and mid-range models, are extremely sensitive to acids formed during defrosting of food, or to physical impact from careless defrosting with a knife. Even a microscopic puncture, invisible to the eye, over time leads to a complete loss of pressure in the system.
The second common problem is corrosion of the steel circuit, especially in solder areas or in the foamed part of the body, where moisture accumulates. In models Indesit No Frost the evaporator in the freezer often suffers due to heating and cooling cycles. Freon leakage this can happen for years until the amount of gas becomes critically small to maintain the temperature.
The problem can be determined by indirect signs, which appear long before the complete failure of the equipment. The compressor begins to hum louder than usual and work non-stop, trying to compensate for the lack of cooling capacity. The cooling becomes uneven: the freezer is still below minus, but the refrigerator compartment is already warm.
⚠️ Attention: If you notice a specific chemical smell in the room, immediately provide ventilation. Although modern refrigerants have low toxicity, their high concentrations in a confined space can be harmful to health, and in combination with open fire, they can be explosive.
Diagnostics of a leak is the first and most important stage of repair. The technician uses a leak detector or soap solution to locate where the gas is escaping. In complex cases, when the leak is hidden in a foam layer, deeper intervention is required. Without an accurate determination of the location of the damage, any refill will only give a temporary effect.
Types of freon and necessary equipment
Refrigerators Indesit of different years of production were filled with different types of refrigerants, and mixing them is strictly prohibited. In older models, R134awas often used, which is an environmentally safer replacement for the banned R12. It requires the use of synthetic or semi-synthetic oil, since mineral oil does not mix with it.
Modern units that meet new environmental standards can operate on isobutane R600a. This is an explosive gas, working with which requires special care and compliance with safety precautions when soldering. The pressure in the system with R600a is lower, and the amount of substance to be charged is measured in grams, which requires high precision of scales.
To carry out high-quality refueling, the master needs a whole arsenal of tools. A simple set of wrenches will not be enough here. The main tool is a pressure gauge station (manifold), which allows you to control the pressure in the system and vacuum the circuit.
- 🛠️ Vacuum pump - necessary to remove moisture and air from the system before refueling.
- ⚖️ Electronic scales - for accurate weighing of the freon cylinder (especially important for R600a).
- 🔥 Gas torch and solder - to seal the system and install the Schrader valve.
- 🔍 Leak detector or ultraviolet lamp - to find leaks.
Using low-quality or unsuitable refrigerant can lead to blockage capillary tube or destruction of the compressor winding. Therefore, when ordering a service, always specify what type of gas will be used for your model Indesit.
Step-by-step instructions for refueling the refrigerator
The refueling process begins with preparing the workplace and providing access to technical components. The compressor is usually located in a niche at the bottom rear of the refrigerator. The first step is to carefully bite off or saw through the compressor filling tube in order to bleed off the remaining old freon and oil.
Next, the Schrader valve is installed on the process pipe. This is a special valve through which the hoses of the pressure gauge station will be connected. The soldering area must be clean and free of grease to ensure a tight connection. After installing the valve, the system is checked for leaks by supplying nitrogen.
☑️ Checklist for preparing for vacuuming
The next critical step is vacuuming. A vacuum pump is connected to the system, which should run for at least 20-30 minutes. This is necessary to remove moisture, which, having frozen in the capillary tube, will cause an ice plug and stop the circulation of the refrigerant. Vacuum in the system is the key to long and stable operation of the refrigerator.
Only after creating a deep vacuum is charging done. A cylinder with freon is connected to the station, and gas is supplied in small portions. During the refueling process, the compressor can be started briefly for better distribution of gas and oil. The pressure is controlled by a pressure gauge, but the main criterion remains the weight of the filled substance.
The final stage is sealing the filling tube. While the system is under pressure, the tube is cut and quickly sealed so that air does not have time to penetrate inside. After this, the operation of the unit is checked in test mode.
⚠️ Attention: Never try to fill the refrigerator by simply piercing the tube with a needle without first vacuuming. The entry of moisture and air is guaranteed to lead to the formation of an ice plug in the capillary after several days or weeks of operation.
Table of operating parameters and pressure
Understanding the operating parameters is necessary for correct diagnosis and refueling. The system pressure depends on the type of refrigerant, the ambient temperature and the design of the refrigeration unit. Below are indicative data for common refrigerants.
| Refrigerant type | Working pressure (bar) | Vacuum pressure | Oil |
|---|---|---|---|
| R134a | 0.8 - 1.2 | Below 0 | Synthetic/Semi-synthetic |
| R600a (Isobutane) | 0.4 - 0.6 | Below 0 | Mineral |
| R12 (Obsolete) | 1.0 - 1.5 | Below 0 | Mineral |
| R404A | 2.5 - 3.5 | Below 0 | Synthetic (POE) |
It is important to understand that the pressure on the pressure gauge is not the only indicator. For precise tuning, it is necessary to take into account the current consumption of the compressor, which is measured with a current clamp. Nominal current indicated on the compressor tag and should not be exceeded.
If the pressure is normal, the current is normal, but there is no cold, the problem may lie in capillary tube clogged. In this case, it is necessary to purge the system with nitrogen under high pressure or replace the filter-drier.
Why can’t you focus only on pressure?
The pressure in the system strongly depends on the ambient temperature. In a hot kitchen in summer, the pressure will be higher than in winter. Therefore, experienced craftsmen always check the current consumption of the compressor and the temperature of the condenser, and not just look at the pressure gauge needle.
Common mistakes during self-repair
Attempts to save on the services of professionals often lead to higher costs for repairs in the future. The most common mistake is refueling “by eye” without using a scale. Excess freon overloads the compressor and can lead to jamming, while too little leads to insufficient cooling.
Ignoring the replacement of the filter drier is the second most popular mistake. This element collects moisture and oil breakdown products. If the filter is not replaced when the system depressurizes, moisture will quickly damage the new compressor. Filter drier This is a consumable material that changes every time the circuit is opened.
Using the wrong oil is also fatal. As mentioned earlier, oils for different freons have different chemical bases. Mixing oils or filling the wrong type leads to the formation of acids that corrode the engine windings from the inside.
- ❌ Lack of vacuuming guarantees the formation of an ice plug.
- ❌ Refueling without looking for leaks is a waste of money, the gas will come out again.
- ❌ Using a burner with an open flame in the presence of R600a vapors, there is a risk of explosion.
- ❌ Saving on a filter drier means the risk of compressor breakdown.
In addition, inexperienced craftsmen often violate soldering technology, overheating the tubes. This leads to the formation of carbon deposits inside the system, which subsequently clogs the thinnest channels of the capillary tube.
Cost of work and feasibility of repairs
The price of refilling with freon consists of the cost of materials (gas, filter, valve) and the complexity of the work. If you need to find a hidden leak in a foamed circuit or replace the evaporator, the cost can increase significantly. Owners of old models Indesit should evaluate the residual life of the equipment.
If the refrigerator is more than 10-12 years old and its housing is rotten or the compressor is worn out, repairs may not be economically feasible. The cost of restoration can be up to 70% of the price of a new device. However, if the equipment is in good condition, replacing the evaporator and refilling it will extend its life by 5-7 years.
It is important to consider that prices for services may vary depending on the region and the urgency of the call. Official service centers often charge more for the brand, but provide a guarantee on the work. Private craftsmen can offer a cheaper option, but the risks are higher.
Is it possible to refill the refrigerator yourself by buying a cylinder of freon?
Theoretically you can if you have professional equipment: a station, a vacuum pump, scales and a burner. However, without soldering skills and an understanding of thermodynamic processes, there is a 99% chance that you will damage the compressor or not eliminate the cause of the leak. Buying equipment will cost more than calling a specialist.
How much freon is needed for an Indesit refrigerator?
The amount of refrigerant is strictly regulated by the manufacturer and indicated on the technical sticker (usually from 30 to 150 grams). For R600a the accuracy is +/- 1 gram. An overdose of even 10-20 grams can damage the equipment.
How often do you need to change freon in the refrigerator?
Freon is not a consumable item and does not require scheduled replacement. In a working, sealed refrigerator, it circulates for decades. If the gas has disappeared somewhere, it means that an accident (leak) has occurred that needs to be repaired.
Why does the refrigerator freeze after refueling, but then stops?
Most likely, there is moisture left in the system that froze in the capillary tube (ice plug), or the filter-drier was not replaced. It is also possible that the system is partially clogged with products of oil combustion or poor-quality soldering.