The appearance of a puddle under the refrigerator or Ice freezing on the rear wall often indicates a problem with refrigerant circulation or condensate drainage. Owners of household appliances immediately begin to look for an answer to the question of how to clean the tubes in the refrigerator in order to avoid costly repairs or food spoilage. A blockage can occur in the drainage system that removes melt water, or, what is much more serious, in the capillary tube responsible for the movement of freon.
Independent intervention requires a clear understanding of the structure of your unit, be it old Atlant or modern Liebherr with the No Frost system. Incorrect procedures can result in damage to thin-walled components or leakage of refrigerant, so it is important to proceed methodically. In this article, we will look at proven methods for eliminating traffic jams, the necessary tools and precautions that will save your budget.
Before taking active steps, it is necessary to conduct an initial diagnosis. Often the problem is solved by simple defrosting if we are talking about an ice plug in the evaporator. However, if the equipment has been turned off for more than a day, and the water does not go away or the cold does not appear, mechanical or chemical cleaning will be required.
Diagnostics of a blockage: where to look for the problem
The first step is always to determine the location of the fault. If water accumulates at the bottom of the refrigerator compartment or flows out, we are talking about the drainage system. In this case clogged drain hole is the most likely cause. Usually, mucus, food crumbs or mold accumulate there, blocking the drain.
The situation changes dramatically if the refrigerator hums, but does not freeze, and the capillary tube on the rear grille remains cold or warm only at the compressor. This indicates clogging of the capillary tube (capillaries). Oil waxing, copper oxides, or moisture could get inside it and turn into an ice plug. For diagnostics, it is often necessary to remove the rear metal panel and visually inspect the system.
- 🔍 Water is in the pan or on the floor - the problem is in the drainage.
- ❄️ The “fur coat” freezes only on part of the evaporator - possible blockage capillary.
- 🔊 The compressor works without stopping, but there is no cold - a violation of freon circulation.
⚠️ Attention: If you find oily spots near the place where the tubes are soldered or feel a specific smell, the circuit may have broken. In this case, cleaning will no longer help, you will need to refill with freon.
Tools and means for clearing drainage
To remove blockages in the drainage system of refrigerators Bosch, Indesit or LG no complex industrial equipment is required. The main task is to mechanically destroy the dirt plug and flush the channel. Often, available means that are found in every home are sufficient for this.
The main tool is a thin but elastic wire or a special brush. It is important that the material is not too sharp, otherwise you can pierce the plastic channel, and then water will flow into the insulation, causing corrosion and an unpleasant odor. The optimal solution is to use medical wire for cleaning catheters or a flexible cable.
Warm water is used for rinsing. In some cases, if the contamination is caused by grease deposits (which is rare, but possible when storing open oil near a drain), a mild soap solution may be required. However aggressive chemistry is contraindicated, as it can corrode plastic seals.
☑️ Cleaning tools
Drainage system cleaning technology
Restoration process the patency of the drainage hole begins with defrosting the refrigerator. Even if you are sure that there is no ice there, it is better to pause for 12-24 hours. This is guaranteed to melt the ice plug if it has formed deep in the channel. After defrosting, you need to find a hole in the back of the refrigerator compartment, usually it is located in the center under the shelves.
Take the prepared wire and carefully insert it into the hole. Movements should be progressive, with slight rotation. Do not use excessive force to avoid damaging the walls. When you feel that the wire has gone further than usual, it means the plug is broken. Now you need to rinse the channel with water.
Fill a syringe or rubber bulb with warm water and sharply inject it into the hole. If the water drains quickly and a characteristic gurgling sound appears below the compressor, then the system is free. If the water stands still, repeat mechanical cleaning. For difficult cases, you can use a special spray for cleaning air conditioners, which dissolves organic matter.
What to do if the water does not leave after cleaning?
If mechanical cleaning and pouring water do not help, the blockage may be deep in the tube extending outside the housing. In this case, blow the system with air through a thin tube, but be careful not to break the connections. Also, the reason may be that the refrigerator is skewed - check the position of the legs.
Removing a blockage in the capillary tube
A blockage in capillary tube is a more complex technical problem, typical for older models and equipment running on R12 or R600a freon. Oil oxidation or moisture ingress leads to the formation of solid particles that clog the thinnest channel with a diameter of less than a millimeter. It is impossible to clean such a system “from the outside”; access to the circuit is required.
There is a method of pushing out the blockage with nitrogen under high pressure. To do this, the technician cuts off the capillary tube from the filter-drier side and connects a nitrogen cylinder. A pressure of 10-15 atmospheres can dislodge the plug. However, at home this method is dangerous and requires special equipment. A more accessible, but labor-intensive method is heating.
The place of the suspected blockage (usually the entrance to the evaporator or the outlet from the condenser) is carefully heated with a hair dryer or hot water. The goal is to soften the paraffin plug or evaporate moisture. At the same time, they try to start the compressor with short-term starts to create a pressure pulse. This process requires patience and may take several hours.
| Method | Complexity | Equipment required | Efficiency |
|---|---|---|---|
| Defrosting | Low | Time (24 hours) | Average (for ice jams) |
| Heating with a hair dryer | Average | Building hair dryer | High (for paraffin) |
| Nitrogen purging | High | Cylinder, reducer | Maximum |
| Capillary replacement | Pro | Turn, solder, new capillary | Guaranteed |
⚠️ Attention: When working with open fire or high temperatures near plastic and thermal insulation, there is a high risk of fire or melting of housing elements. Be extremely careful.
Chemical agents and flushing the system
In professional repairs, special solvents are used to clean the internal cavity of the tubes from oxides and oil breakdown products. The most common remedy is solvent R141b or isopropyl alcohol. These substances perfectly dissolve organic deposits and do not leave moisture after evaporation.
Rinsing is done by connecting a container with a solvent to a cut capillary tube or filter-drier. The liquid flows by gravity or under slight pressure through the system, washing away dirt. After the procedure, the system must be purged with dry nitrogen to remove residual chemicals and moisture. The use of water to flush the internal circuit is strictly prohibited!
For the household user, this method is only available in theory, since it requires evacuation of the system after flushing. Remaining moisture or solvent in the circuit will cause compressor failure within a few months. Therefore, if you do not have the skills to solder and work with refrigerants, it is better to limit yourself to external methods or call a specialist.
Prevention and care of the refrigerator
To ensure that the question “how to clean the pipes in the refrigerator” does not arise again in six months, you must follow the operating rules. The main cause of drainage blockages is neglect of hygiene. Regular washing of the chamber with a soda solution will prevent the growth of bacteria and the formation of a mucus plug.
For a capillary system, voltage stability in the network is important. Frequent surges in electricity lead to overheating of the compressor and accelerated aging of the oil, which provokes the formation of paraffin deposits. Installing a voltage stabilizer is the best investment in the long life of equipment from brands Samsung, Whirlpool and others.
Also monitor the temperature conditions. Do not set the controller to maximum cooling unless necessary. This leads to continuous operation of the motor and freezing of moisture in the capillary. The optimal setting is 3...4°C for the refrigerator compartment and -18°C for the freezer.
- 🧼 Wash the drainage hole every 3-4 months with warm water.
- 🔌 Use a surge protector to protect against surges voltage.
- ❄️ Do not load hot foods into the chamber - this creates excess moisture.
⚠️ Attention: The design of refrigerators is constantly being improved. In newer models with intelligent control, some parts may be difficult to access. Before disassembling, check the manufacturer's technical documentation.
When it is necessary to call a specialist
Despite the desire to save money, there are situations when self-repair impossible or dangerous. If after all the cleaning attempts the refrigerator does not start to freeze, then the problem is deeper. It is possible that water hammer or the compressor has lost performance.
Also, professional help is needed if the filter drier needs to be replaced. This element is disposable and is replaced whenever the circuit is opened. Its installation requires soldering and subsequent vacuuming of the system with a special pump for 30-40 minutes. Without a vacuum, residual moisture will kill the compressor.
A technician will also be needed if a freon leak is detected. In this case, cleaning the pipes is only half the battle. It is necessary to find the location of the leak (often microcracks in the foamed evaporator), seal and refill with new refrigerant in compliance with the dosage.
Is it possible to use a brush to clean pipes?
The use of a brush is only permissible for the drainage hole in the plastic panel. This is prohibited for metal tubes inside the system, since the bristles can come off and create a new, more serious blockage, or damage the walls of the tube.
How much does it cost to clean a capillary from a specialist?
The cost of the service varies depending on the model of the refrigerator and the difficulty of access. Typically, the work of purging or replacing a capillary tube costs from 2,000 to 5,000 rubles, not counting the cost of materials and travel.
Why does the refrigerator freeze after cleaning, but then stops?
This is a sure sign that there is moisture left in the system. It circulates along with freon, periodically freezing in a bottleneck in the capillary and blocking the flow of refrigerant. A full evacuation and replacement of the filter-drier are required.
Is cleaning with alcohol dangerous for rubber seals?
Isopropyl alcohol in short-term contact is not dangerous for modern synthetic rubbers. However, prolonged exposure can cause them to dry out. The main thing is to prevent solvent from getting on the external plastic elements of the case, which can become cloudy.