The situation when Biryusa refrigerator is turned on, the compressor makes a characteristic hum, but it is warm inside the chamber, is one of the most common and alarming. Owners often think that since the motor is noisy, it means that the equipment is working properly, but in reality this may indicate serious malfunctions in the refrigerant circulation system. Household equipment ceases to perform its main function, and the products begin to deteriorate, which requires immediate intervention.
Before calling a technician or disassembling the unit, it is necessary to carry out initial diagnostics. Motor-compressor may run idle due to freon leakage, clogged capillary tube or loss of piston group performance. In this article we will analyze in detail the mechanics of the process so that you understand why refrigerator compartment it does not cool, despite the engine running.
Sometimes the problem lies not in a breakdown, but in a violation of operating rules or defrosting. However, if you hear a smooth hum of the motor, and the condenser (grid at the back) remains cold, or, conversely, heats up in only one place, this is a sure sign of a technical malfunction. Diagnostics must be carried out quickly and competently to avoid more expensive repairs in the future.
The main reasons for the lack of cold when the compressor is running
The most common reason why Biryusa refrigerator hums, but does not freeze, lies in the violation of the tightness of the circuit. Freon is the working fluid that transfers heat. If there is no or critically little of it in the system, the compressor simply drives emptiness. In this case, the motor may run continuously, trying to gain temperature, but cooling does not occur.
The second most common reason is clogged capillary tube. An ice blockage may have formed in the circulation system or technical debris may have entered, blocking the flow of refrigerant. The pressure at the outlet of the compressor increases, but there is no pressure in the evaporator, therefore temperature condition it is not observed. Under such conditions, the compressor often overheats and turns off via a thermal relay, after which it starts again.
⚠️ Attention: If you notice that the back wall of the refrigerator is swollen or oily spots have appeared on it, Do not continue operation under any circumstances. This is a sign of depressurization and oil leakage from the system, which requires professional soldering and vacuuming.
The third reason is the loss of performance of itself compressor. The piston group could wear out, the valves could burn out, and the engine stops creating the necessary pressure to compress the gas. Outwardly it works, makes noise and vibration, but is functionally dead. This can be determined by the absence of characteristic pulsation on the tubes or by the weak freon current.
Diagnostics of freon leak: how to find the location of damage
Search refrigerant leaks - a process that requires attentiveness. In refrigerators Biryusa the foamed evaporator, which is located inside the walls of the case, often suffers. If you see that the engine is running, but the condenser tubes at the back remain cold, then gas has left the system. It is impossible to visually determine the location of the leak in the foamed part without special equipment.
However, there are external signs. Inspect crying evaporator (the back wall inside the chamber). If there is no uniform layer of frost or ice on it, but only isolated islands are visible, or it is completely dry when the engine is running, this confirms a leak. It is also worth checking the soldering points of the tubes suitable for the compressor and the area around the door seal where the defrost circuit passes.
To accurately determine the location of the gas outlet, craftsmen use electronic leak detectors or the method of immersion in water (for removed units). At home, you can apply a soap solution to suspicious pipe joints. The appearance of blisters will indicate a fistula. If the leak is found in an accessible location, repair is possible. If the gas has escaped through the housing, this is a complex case that requires the installation of an external evaporator.
Why can’t you ignore a freon leak?
Operating a compressor without freon cooling (in vacuum mode) leads to overheating of the motor windings and insulation burning. In addition, moisture and air enter the system, causing oxidation of the tubes from the inside, which will ultimately lead to complete blockage of the system and expensive repairs.
Clogged capillary tube and filter drier
Clogging capillary tube is a “heart attack” of the refrigeration system. The thinnest tube through which freon enters the evaporator becomes clogged with oxidation products or ice (if there is moisture in the system). The compressor Biryusa tries to push gas, hums, but there is no circulation. A characteristic sign is a hot compressor and a hot filter drier (cylindrical barrel in front of the capillary), while the rest of the condenser is cold.
Often the blockage is accompanied by “popping” or clicking sounds when the motor stops. This is the sound of gas expansion in a blocked system. Filter drier in such cases, it also ceases to perform its function and itself becomes part of the problem, since its filler can crumble and completely clog the system.
Removing the blockage requires professional intervention. The technician cuts off the capillary, purges the system with nitrogen under high pressure and replaces the filter drier. It is impossible to clean the capillary tube yourself without a vacuum pump and filling equipment. Attempts to break through the blockage by piercing the tube will lead to complete depressurization. freon impossible. Attempts to break through the blockage by piercing the tube will lead to complete depressurization.
Problems with the motor-compressor: wear and breakdowns
When they say that the engine is runningthey often mean that it consumes electricity and vibrates. But does it create compression? In older models Biryusa piston rings or valve plates wear out over time. The engine spins, but does not pump freon with the required force. The discharge pressure drops and cold is not generated.
You can check the compression by disconnecting the tube at the outlet of the compressor (after bleeding off the freon!). If, when turned on, a finger brought to the hole does not feel a powerful blowing, it means it is exhausted. Also, a breakdown is indicated by excessively quiet operation (if it is not an inverter) or, conversely, a metallic clang. compressor resource exhausted. Also, a breakdown is indicated by excessively quiet operation (if it is not an inverter) or, conversely, a metallic clang.
In some cases, the problem lies in the starting relay. If it is stuck or faulty, the compressor may hum without starting, or start jerkily. However, if the engine runs smoothly and for a long time, but does not cool, most likely the problem is in the mechanical part unit. Replacing a compressor is a labor-intensive process that requires resoldering the tubes and refilling.
Faults in the defrost system (for No Frost models)
If you have Biryusa refrigerator with the No Frost system, and it stops freezing when the motor is running, the reason may lie in the defrost system. The heating element, defrost thermostat or timer may have failed. As a result, the evaporator becomes overgrown with a “coat” of ice, which blocks the circulation of cold air. The motor is running, trying to cool the chamber, but the air simply does not pass through the ice cocoon.
In such cases, you can often hear the fan inside the freezer starting to crackle, hitting the frozen ice with its blades. Refrigerator compartment It can maintain the temperature for some time due to inertia, but the freezer will quickly defrost. Checking the defrost elements requires a “continuity test” with a multimeter.
It is important to distinguish: if the evaporator is frozen completely and evenly, this is normal for the operating cycle. If a block of ice blocks the air ducts, this is a malfunction. Sometimes completely defrosting the refrigerator within 24 hours helps. If, after switching on, the problem returns after 1-2 weeks, it means that one of the elements of the defrost circuit requires replacement.
| Symptom | Probable cause | Characteristic symptom | Difficulty of repair |
|---|---|---|---|
| The motor is humming, the tubes are cold | Freon leakage | Lack of frost on the evaporator | High (needs sealing) |
| Motor is hot, filter is hot | Capillary clogged | Popping noise when stopping | Medium (needs purge) |
| Motor runs, but is quiet | Loss of compression | Weak blowing out of the tube | High (motor replacement) |
| There is ice in the freezer, no cold | Defrost failure (No Frost) | The fan is cracking | Medium (replacing the heating element/timer) |
Action algorithm: what the owner should do
If you are faced with the problem described, do not panic. First, assess the scale of the disaster. Check whether the door closes tightly and whether a piece of food is stuck in the seal. Make sure that thermostat is not turned to minimum by accident. If mechanical causes are excluded, proceed to analyze the operation of the motor.
Listen to the refrigerator. A smooth hum without knocking or clicking in the absence of cold is almost always a leak or blockage. If the motor jerks and clicks, the problem is electrical (relay, starting capacitor). In the first case, independent repairs without equipment are impossible, in the second, you can try replacing the relay if you have the skills.
☑️ Actions before the technician arrives
Do not try to open sealed tubes or pierce the housing yourself for “quick filling” of freon through the valve. Such actions in 90% of cases lead to moisture getting into the system, which permanently fails the system. A qualified technician first vacuums the system, removing moisture, and only then refills the gas. Biryusa refrigerator completely out of order. A qualified technician first vacuums the system, removing moisture, and only then fills the gas.
⚠️ Attention: Technical characteristics of Biryusa refrigerators may vary slightly depending on the year of manufacture and the specific modification. Before ordering spare parts (compressor, heating element, relay), be sure to check the article numbers on the nameplate of your device or in the official documentation of the manufacturer.
Frequently asked questions and answers (FAQ)
How long should a compressor operate normally?
In normal mode Biryusa refrigerator works cyclically: it works for about 15-20 minutes and rests for 20-30 minutes. If the motor hums continuously for more than 40-50 minutes and does not turn off, and the cold does not accumulate, this is a sign of a malfunction (leakage, blockage, wear).
Is it possible to operate the refrigerator if it does not freeze?
It is strictly not recommended. Operation motor-compressor without proper cooling (which is provided by circulating freon) leads to its overheating and combustion of the windings. It is better to turn off the device until the malfunction is eliminated.
Why did the refrigerator start working after defrosting, but a week later it stopped again?
This is a classic symptom clogging of the capillary tube or the presence of moisture in the system. When defrosting, water turns into ice and blocks the flow of freon. After complete defrosting, the ice melts and the system works. After a week, moisture again accumulates in a narrow place and freezes. Professional blowing and filter replacement are required.
Replacing a compressor on Biryusa - is it difficult?
Yes, this is a complex technical process. It requires unsoldering of copper tubes, installation of a new motor, a new filter-drier, evacuation of the system for 30-40 minutes and precise filling freon by weight. Without special equipment (burner, pump, pressure gauges, scales) it is impossible to do the job efficiently.