Refrigerator decompression: why it occurs and how to fix it

Have you noticed that the refrigerator has stopped working? freezing, the compressor is running non-stop, but frost or condensation appears on the back wall? Perhaps we are talking about decompression of the refrigeration system one of the most insidious malfunctions, which can lead to complete failure of equipment. Unlike banal wear of the seal or clogging of the capillary tube, decompression requires accurate diagnosis and often professional intervention.

In this article we will analyze what decompression in the refrigerator is at the household and technical level, by what signs to recognize it, what models (Indesit, Atlant, Samsung, Liebherr) are most vulnerable, and is it possible to fix the problem yourself. You will also learn how much repairs cost at service centers and how to prevent the problem from recurring. If your unit “wheezes” but does not cool, read on.

What is refrigerator decompression in simple words

The term decompression in the context of refrigerators means loss of tightness of a closed refrigerant (freon) circulation system. Normally, freon moves along the circuit (compressor → condenser → filter drier → capillary tube → evaporator) under pressure, providing cooling. During decompression, the pressure drops, the refrigerant stops evaporating in the required volume - and the refrigerator loses its ability to maintain a low temperature.

Simply put, imagine a bicycle inner tube: if it contains a hole will appear, air will escape, and the tire will go flat. Similarly in the refrigerator: even a microscopic crack in the tube or a leaky connection leads to a freon leak. But unlike the chamber, it is impossible to “pump up” the refrigerator again - soldering, evacuation and charging of refrigerant are required.

• 🔧 Physical essence: violation of the tightness of the circuit → pressure drop → lack of freon boiling in the evaporator.
• ⚠️ Consequences: the compressor is working "idle", overheats and can burn out.
• 💰 Repair cost: from 3,500 to 12,000 rubles (depending on the model and complexity of the leak).

Decompression is often confused with others malfunctions, for example, a broken thermostat or a clogged capillary pipe. However, its key feature is complete lack of cooling when the compressor is running. If the motor is humming, but there is no cold, this is a reason to suspect a freon leak.

Signs of decompression: how to recognize a freon leak

Decompression rarely occurs suddenly - it is usually preceded by indirect symptoms that users ignore. Here top 7 signsindicating a loss of system tightness:

1. The refrigerator does not cool, but the compressor works. The motor hums without interruption, but the temperature in the chambers remains room temperature or slightly cool.
2. Evaporator freezing. A thick layer of ice or frost forms on the back wall of the freezer (a sign that freon is not circulating correctly).
3. Condensation on the condenser tubes. If drops of water or rust appear at the back of the refrigerator, refrigerant may be leaking there.
4. The compressor overheats. The motor housing is hot to the touch (normal: warm, but not scalding).
5. Clicks or hissing. If freon leaks at the crack, a slight hissing sound may be heard (like air from punctured ball).
6. Oil stains. Freon circulates along with oil - if greasy spots appear on the floor under the refrigerator, this is an alarming signal.
7. Errors on the display. Modern models (Samsung RB37J5240SA, Liebherr CNef 4815) may generate fault codes, for example E1 or F5 (refrigerant leak).

Important: some symptoms (for example, evaporator freezing) may indicate other problems, such such as a clogged capillary tube or a broken thermostat. To accurately diagnose decompression, you need a pressure gauge to check the pressure in the system.

Causes of decompression: why freon leaks

Refrigerant leakage never occurs on its own on its own - it is always preceded by mechanical damage or a manufacturing defect. Let's consider the main reasons:

The most common cause is corrosion. Condenser tubes (especially in models with a “crying” evaporator) rust over time due to condensation. For example, in refrigerators Atlant the section of the tube near the compressor often suffers - moisture accumulates there. Mechanical damage is typical for units that were transported or moved without being disconnected from the network.

⚠️ Attention: If your refrigerator has been standing without use for more than a year, check the integrity of the tubes before turning it on. Prolonged downtime without freon accelerates corrosion!

Diagnostics of decompression: can you check it yourself

It is difficult to accurately diagnose a freon leak at home, but there are several ways preliminary checkthat will help confirm or refute suspicions:

Disconnect the refrigerator and defrost it for 12 hours|Check the temperature of the condenser (normally it should be warm)|Listen to the compressor - if there is a leak, it works without pauses|Inspect the tubes for oil stains or rust|Check whether the fan is blowing in models with No. Frost-->

For more accurate diagnostics, you will need a pressure gauge manifold, which is connected to the service port of the compressor. Normal pressure readings:

• 🔹 On the suction line (blue tube): 0.2–0.5 bar (with the compressor running).
• 🔹 On the discharge line (red tube): 8–12 bar.

If the pressure is close to zero or does not change when the compressor is turned on, this confirms decompression. You can also use leak detector (electronic or ultraviolet), which reacts to freon vapors.

In service centers to find leaks they use:

• 🔦 Ultraviolet additive (it is added to the system during refueling - under UV illumination, the location of the leak lights up).
• 💨 Nitrogen under pressure (supplied into the system - hissing is heard at the leak site).
• 🔍 Soap solution (applied to the connections - bubbles appear when there is a leak).

⚠️ Attention: Do not try to “seal” the leak with sealant or tape! Freon under pressure will corrode any unprofessional repair, and the problem will get worse.

How to eliminate decompression: step-by-step instructions

If the diagnosis is confirmed, there are two ways: take the refrigerator to a service center or try to repair it yourself. Independent repair possible only for small leaks in accessible places (for example, on a straight section of the tube). For work you will need:

• 🔧 Set for soldering copper tubes (torch, solder, flux).
• 🛠️ Manometric manifold with hoses.
• 💨 Vacuum pump (can be rented).
• ❄️ Refrigerant (the type of freon is indicated on the refrigerator nameplate, for example, R-134a or R-600a).
• 🔨 Tube cutter and rolling.

Step-by-step repair algorithm:

1. Turn off the refrigerator and defrost it for 24 hours. Drain the water from the pan.
2. Locate the leak (using a soap solution or a leak detector). data-i="153">— Connections of tubes with the compressor;
   • — Connections of pipes with the compressor;
   • — Areas near the filter drier;
   • — Bends of the capillary tube.
3. Solder the crack:
   • Clean the soldering area sandpaper;
   • Apply flux;
   • Heat with a torch and solder with solder (for example, POLYSOLDER).

Replace filter drier (required! The old filter becomes clogged with moisture and acid after a leak).

Vacuum the system: connect the vacuum pump to the service port and pump out the air for 20–30 minutes.

Fill with freon: connect the refrigerant cylinder through the pressure gauge and charge the system (check the pressure using the pressure gauge).

Check the tightness: turn on the refrigerator and monitor the pressure for 1-2 hours.

If the leak occurs in the foamed part of the body (for example, in the freezer), repairs at home are almost impossible - it will be required opening the polyurethane foam insulation, which is fraught with loss of thermal insulation properties.

What to do if there is a leak in the foamed part?

In this case, you will have to take the refrigerator to a service center, where the technician will:

1. Localize the leak using a leak detector.

2. Open the case in the right place (with minimal damage to the foam).

3. Install a copper sleeve or solder the tube.

4. Fill the repair area with a special compound.

5. data-i="176">The cost of such repairs starts from 8,000 rubles, but it is justified for expensive models (

The cost of such repairs starts from 8,000 rubles, but it is justified for expensive models (Liebherr, Miele).

Cost of decompression repair in the service

The price of repairs depends on the complexity of the leak, the brand of the refrigerator and the region. Below is the approximate price list for Moscow and the regions (for 2026 year):

Total minimum cost of repairs (simple leak + refill) will cost 5 000–7 000 ₽, A complex repairs (opening the case, replacing tubes) can achieve 15 000–20 000 ₽. For refrigerators older than 10 years, such repairs are often unprofitable - it is cheaper to buy a new unit.

⚠️ Attention: Freon prices R-600a (isobutane) are higher than on R-134a, due to its explosiveness. Also, some services charge an additional fee for departure (500–1,500 ₽).

Decompression prevention: how to extend the life of a refrigerator

It is impossible to completely eliminate the risk of freon leakage, but you can significantly reduce the probability breakdowns by following simple rules:

• 🧊 Defrost your refrigerator regularly (even models with No Frost need to be defrosted 1-2 times a year. Ice accumulation accelerates tube corrosion.
• 🚫 Do not move the refrigerator when it is on - vibration can damage the soldering. Always unplug it before moving it.
• 🌡️ Control the room temperatureIf the refrigerator is located in an unheated garage or on a balcony where the temperature drops below. +5°C, the oil in the compressor thickens, and the risk of breakdown increases.
• 🔌 Use a voltage stabilizer. Voltage surges cause overheating of the compressor and microcracks in the tubes.
• 🧼 Clean the condenser (grid on the back wall) from dust and cobwebs every six months. Pollution worsens heat transfer and increases the load on the system.
• 🛠️ Check. door seal. Worn rubber leads to freezing of the evaporator and corrosion.

For models with the system No Frost it is especially important to monitor the operation of the fan. If it starts to make noise or periodically stops, this is a sign of icing on the evaporator, which can lead to corrosion of the tubes.

You should also avoid aggressive detergents when cleaning the refrigerator. Bleach or abrasive powders corrode metal and rubber seals, causing leaks. Use special compounds for refrigerators or a weak soda solution.

Frequently asked questions about decompressing refrigerators

Is it possible to use a refrigerator with a leak? freon?

Technically it is possible, but extremely undesirable. The compressor will work without stopping, which will lead to its overheating and rapid breakdown. In addition, some types of freon (for example, R-600a) are explosive if leaked in a closed room. If the refrigerator does not cool, it is better to turn it off before. repair.

How long does a decompression repair take in the service?

The period depends on the complexity of the leak:

• Simple soldering + refilling: 2–4 hours (possible in one visit of the specialist).
• Leakage in the foamed part: 1–2 days (requires foam drying after opening).
• Replacement of the compressor + elimination of leakage: up to 3 days (if spare parts are needed).

In most services, repairs are performed at home, if there is access to an outlet and space for work.

What kind of freon is used in modern refrigerators?

Since the 2010s, manufacturers have switched to environmentally friendly refrigerants:

• R-600a (isobutane) - used in 90% of household refrigerators (Atlant, Indesit, LiebherrExplosive, but harmless to the ozone layer.
• R-134a - found in older models and some industrial refrigerators. Less effective than R-600a.
• R-290 (propane) - used in some models Samsung and LGAlso flammable.

The type of freon is indicated on the nameplate. (sticker) on the back of the refrigerator or in the passport.

What to do if after repair the refrigerator does not freeze again?

Probable reasons:

• 🔹 Poor soldering —the leak remains or a new one has appeared.
• 🔹 Insufficient freon filling —the technician did not add enough refrigerant.
• 🔹 Clogged capillary tube —moisture could get into the system during vacuuming.
• 🔹 Failure of the compressor —if it was running “dry” for a long time, it could burn out.

In this case, you need to call the repairman again (good services have a guarantee for decompression repairs of 6–12 months. If the refrigerator is under warranty, demand free repair of the defect.

Is it possible to refill the refrigerator yourself? freon?

Theoretically yes, but highly not recommended without experience. Errors during refueling will lead to:

• 🔹 Refilling (the compressor will work with overload).
• 🔹 Air entering the system (will lead to corrosion).
• 🔹 Explosion (if used R-600a and there is a gas leak into the room).

For refueling you need a manometric manifold, a vacuum pump and precise scales (freon is dosed per grams). video instruction