The situation when refrigerator Biryusa 133 stops turning off is critical for the service life of the compressor and the safety of products. In normal operation, the unit should cyclically freeze the chambers and go into “rest”, maintaining the set temperature. If the motor hums continuously, and a “snow coat” forms inside or, conversely, the food begins to deteriorate, it means that the balance of heat exchange or the control system is disturbed.
Constant operation of the engine leads to its overheating and eventual failure, which will require an expensive replacement. For owners of the model Biryusa 133, which is often equipped with a No Frost or drip defrosting system, it is important to quickly identify the cause. The main reason for continuous operation in 80% of cases is loss of tightness circuit or malfunction of the thermostat. Ignoring the problem can lead to defrosting the entire food supply in a matter of hours.
In this article we will analyze the main technical and operational factors that affect the compressor operating cycle. You will learn how to distinguish a software failure from a serious mechanical breakdown, and what steps you can take on your own before the technician arrives.
Checking the door fit and tightness
The most commonplace, but common reason for continuous operation is that warm air from the room constantly gets inside the chambers. If the door of the Biryusa refrigerator does not close tightly, sensors detect an increase in temperature and command the compressor to work without stopping. Check whether food or dishes are preventing the door from closing tightly.
Pay special attention to the rubber seal around the perimeter of the door. Over time, the rubber loses elasticity, cracks or moves away from the body. Dirt and grease can also compromise the seal of the connection. If the seal is damaged, the cold will evaporate and the motor will wear out.
- 🚪 Inspect the door for any distortions in the hinges that could occur after long use.
- 🧼 Wash the rubber cuff thoroughly with warm water and soap to remove sticky residue.
- 📏 Use a sheet of paper: clamp it with the door and try to pull it out - if it slides freely, the seal is broken.
⚠️ Attention: If you find that the magnetic tape inside the seal has weakened, try warming it with a hairdryer or replacing the entire element, since gluing in this case is ineffective.
Thermostat faults and temperature sensors
The thermostat (thermostat) is the “brain” that tells the compressor when to turn on and when to stop. In the model Biryusa 133 this element may fail due to power surges or natural wear of the contacts. If the thermostat is “stuck” in the “on” position, the refrigerator will freeze to the bitter end, ignoring the real temperature inside.
In modern electronically controlled versions, air sensors are used instead of a mechanical regulator. Their readings may be distorted if the sensor has moved out of place or its contacts have oxidized. In such cases, alarm indicators may light up on the control panel, although visually the device appears to be working properly.
To diagnose a mechanical thermostat, it often requires testing it with a multimeter or temporarily replacing it with a known-good analogue. Electronic units require more complex diagnostics through the service menu or checking the circuit resistance.
- 🌡️ If the capillary tube of the thermostat is mechanically damaged, the refrigerant inside it evaporates and the contacts do not open.
- 🔌 Oxidation of the contacts in the control circuit can lead to false signals about a shortage cold.
- 📉 Failure to calibrate the electronic sensor leads to the system “thinking” that the chamber is +10°C instead of -18°C.
How to check the thermostat without instruments?
Unplug the refrigerator, remove the thermostat and lower its sensitive part (capillary) into a container with cold water (about 0°C). If there is no click after 2-3 minutes, but the contacts ring, the device is faulty and requires replacement.
Refrigerant leakage and compression problems
When a microcrack occurs in the freon circulation system, the pressure drops and the refrigerant becomes insufficient for effective cooling. The compressor Biryusa refrigerator begins to work continuously, trying to compensate for the lack of cooling capacity. However, even working 24 hours a day, it cannot achieve the specified parameters, since it is useless to “heat” the street.
Leaks often occur in places where the tubes are soldered, in the evaporator (especially if it was damaged with a knife during defrosting) or in the foamed part of the case. A symptom of a leak is also a hot condenser (grid at the back) only in the upper part or a complete lack of heating, as well as swelling of the walls of the refrigerator.
Under such conditions, the compressor operates with overload, which can lead to it jamming. It is important not to allow equipment to operate in this mode for a long time. If you notice that the refrigerator is humming, but not cooling, or cooling very weakly, this is a sure sign of loss of freon.
Clogged capillary tube and filter-drier
Another technical reason why Biryusa 133 refrigerator does not turn off is blockage of the capillary tube. This is a thin channel through which liquid freon enters the evaporator. Over time, oil oxidation products or moisture may accumulate in the system, which turns into an ice plug.
If clogged, the circulation of the refrigerant is disrupted. The compressor tries to push freon, working at its maximum capacity, but no cooling occurs. The suction pressure drops and the discharge pressure rises. This creates a characteristic sound of the motor and is often accompanied by strong heating of the compressor housing.
The blockage can be diagnosed by the temperature of the filter-drier (copper cartridge in front of the capillary entrance). If it is colder than the environment or covered with frost, and the condenser is only partially hot, there is a problem with circulation.
| Symptom | Possible cause | Nature of motor operation |
|---|---|---|
| Frost on the filter drier | Clogged capillary tube | Humming, overheating, does not turn off |
| Warm filter, cold evaporator | Freon leak | Works continuously, quiet hum |
| The evaporator is unevenly covered | Lack of freon or clogged | Operation cycles are disrupted |
Failure in the defrost system (for No Frost models)
If yours Biryusa 133 is equipped with a No Frost system, then continuous operation of the compressor may be a consequence of the evaporator being “overgrown” with ice. Normally, once every 8-12 hours the defrosting heating element is turned on, which melts the ice. If the heating element is burned out, the defrost sensor is faulty, or the timer/control module does not give a command to defrost, ice blocks the air channels.
The cold stops flowing into the chamber, the sensors record the heat and force the compressor to work without stopping. Visually, the chamber can be clean, since the ice is hidden behind a plastic panel on the back wall. Signs of such a breakdown can also be extraneous sounds from the fan, which touches the ice coat.
To eliminate the malfunction, you need to completely defrost the refrigerator within 24 hours (doors are open) and subsequent diagnostics of the elements of the defrost system: heating element, defrost sensor and fuse.
⚠️ Attention: Do not try pick out the ice with a knife or sharp objects - you can break through the evaporator, and then repairs will become economically unfeasible.
☑️ Diagnostics of the No Frost system
The influence of external factors and operating conditions
The problem does not always lie within the equipment. Biryusa refrigerator It may not turn off due to improper operating conditions. For example, if the unit is installed too close to a wall, the radiator at the back cannot efficiently transfer heat. The air stagnates, cooling efficiency drops, and the motor is forced to work longer.
The temperature in the room also matters. If the room is hot (above +30°C), the standard operating cycle may not be enough to maintain the cold. In addition, loading the refrigerator with warm food forces the system to work in increased mode until all the contents have cooled down.
Check whether the refrigerator is not in direct sunlight or near heat sources (battery, stove). Even a slight increase in ambient temperature significantly increases the load on the compressor.
Frequently asked questions (FAQ)
Is it possible to operate a refrigerator if it is not turns off?
Short-term - yes, to save food. However, long-term operation (more than a day) will lead to overheating of the compressor windings, oil burnout and eventual jamming of the motor. Repairs in this case will cost much more.
How long should the Biryusa 133 compressor normally operate?
Under normal conditions, the operating coefficient is about 30-40%. This means that out of one hour the compressor works for 20-25 minutes, and rests for the rest of the time. If it works for 40 minutes or more without a break, this is a cause for concern.
Why does the refrigerator not turn off for a long time after defrosting?
After complete defrosting, the heat capacity of the food and walls is high. The compressor takes time (from 2 to 6 hours) to freeze the chambers to the specified temperatures. If after 8 hours of operation it does not turn off, it means there is a malfunction.
Does the amount of food affect the operating time?
Yes, a full refrigerator keeps the cold longer and turns on less often, but when first loaded with warm products it will work for a long time. An empty refrigerator gains temperature faster when the door is opened, which also increases the frequency of switching on.