The situation when the refrigerator Biryusa stops turning off is one of the most alarming for the owner of household appliances. Continuous hum of the motor, lack of cyclical operation and constant vibration of the body are sure signs that the cooling system is operating in emergency mode. Ignoring the problem will not only lead to a significant increase in energy bills, but can also cause a complete breakdown of an expensive compressor.
Why does the device not go into standby mode? Most often malfunction it lies in a violation of heat exchange, refrigerant leakage or failure of temperature sensors. In some cases, the reason may be trivial: for example, a door that is not tightly closed or the unit is installed next to a heat source. It is important not to panic, but to consistently check the main components in order to eliminate simple errors before calling a technician.
In this article we will analyze in detail the diagnostic algorithm for models Biryusa various series. You will learn how to distinguish a software failure from a mechanical failure, and what actions you can perform yourself without having a special tool. Remember that timely identification of the cause is the key to the long service life of your equipment.
⚠️ Attention: If you smell burning or see sparking in the compressor area, immediately disconnect the device from the power supply. Further operation in this condition may lead to a fire.
Primary diagnosis and external factors
Before proceeding with complex diagnostics of internal components, it is necessary to exclude external factors that are often left unattended. Refrigeration equipment Biryusa, like any other equipment, is sensitive to environmental conditions. If the unit is installed near a radiator, stove, or in direct sunlight, the heat transfer of the condenser is disrupted, and the compressor is forced to work without interruption, trying to compensate for excess heat.
Check the tightness of the rubber seals around the perimeter of the door. Even a small gap through which warm air enters the chamber causes the temperature sensors to record an increase in degrees. In response to this thermostat gives a command to the motor to continue working. Carry out a simple test with a sheet of paper: clamp it between the door and the body in different places - it should be pulled out with force.
It is also worth assessing whether the refrigerator is loaded too tightly. The circulation of cold air inside the chambers must be free. If the products lie close to the rear wall or cover the outlet openings of the air ducts, temperature conditions it is broken, which provokes continuous operation of the engine. In modern models with the No Frost system, this is especially critical.
Checking the thermostat and temperature sensors
One of the most common reasons why Biryusa does not turn off is a malfunction of the thermostat. This element is responsible for monitoring the temperature inside the chambers and sending a signal to turn off the compressor when the set values are reached. If the contacts inside the regulator are “stuck” in the closed position, the motor power supply circuit does not open, and it hums constantly.
In models with electronic control, sensors (thermistors) are responsible for this function. If they break or are displaced, incorrect data may be displayed on the control board, or the module simply does not receive a signal that the cold has reached. Replacing thermal sensor often solves the problem, but requires disassembling the inside of the chamber or evaporator.
Mechanical thermostats are characterized by loss of sensitivity of the bellows tube. If the tube surrounding the evaporator has lost its seal or has moved, the regulator “thinks” that the chamber is warm. In this case, you need to carefully replace the unit with a similar one that is suitable in terms of parameters for your series Biryusa.
Refrigerant problems: freon leak
If the refrigerator runs non-stop, but there is no or insufficient cold inside, there is a high probability of a refrigerant leak. Freon circulates in a closed circuit, and if its quantity decreases, it pressure in the system falls. The compressor tries to reach the required temperature, working for wear, but due to the lack of working fluid, the cooling efficiency tends to zero.
A leak can occur anywhere in the circuit: in the foamed part of the housing, in the condenser or in the places where the tubes are soldered. Often a sign is swelling of the back wall inside the chamber or the appearance of oily spots under the unit. It is difficult to find the location of the leak on your own, since it requires special equipment - a leak detector and a pressure gauge station.
It is important to understand that simply “add freon” in case of a leak is a temporary solution. First you need to find and seal the damage site, evacuate the system and only then fill it with a new volume of gas. Ignoring this rule will lead to moisture entering the system and failure of the compressor.
| Symptom | Probable cause | Required action |
|---|---|---|
| The engine is humming, there is no cold | Freon leak | Call a technician to find a leak |
| The compressor is hot, does not turn off | Clogged capillary tube | Purge the system and replace the filter |
| You can hear the sound of flowing liquid | Lack of refrigerant | Refilling after repair |
| The refrigerator turns off, but rarely | Incorrect setting | Adjusting the thermostat |
Faults in the compressor and start relay
The heart of the refrigerator is the compressor. If it runs continuously but does not produce enough pressure, there may be a loss of performance due to wear on the piston group or valves. In this state, the motor consumes current, hums, but does not pump freon with the required intensity. This condition is often called a “weak compressor.”
Another common problem is a faulty start relay. This small block is responsible for starting the engine. If the relay contacts are burnt or the mechanism is stuck, the compressor may not start the first time or work intermittently, which is perceived by the system as a need for constant operation. Sometimes the relay simply “sticks” in the on position, constantly supplying power to the motor windings.
When diagnosing, pay attention to the temperature of the compressor housing. If it is so hot that it is impossible to touch it, and the refrigerator does not freeze, this is an alarming sign. In some cases, replacing the start protection relay helps, which is a relatively inexpensive repair compared to replacing the motor itself.
How to check the start relay?
Remove the relay from the compressor and shake it. If you hear a knock inside or see traces of burning, the part is faulty. You can also test the contacts with a multimeter - in normal condition, the resistance should be zero or close to it.
Clogged capillary tube and filtration system
There is a bottleneck in the freon circulation system - the capillary tube. This is where the refrigerant throttling occurs. Over time, oxidation products, moisture or technical debris can accumulate in the system, which leads to the formation of a blockage (plug). Freon cannot circulate, the pressure at the outlet of the compressor increases, and at the inlet decreases, which blocks the normal operation of the cycle.
Signs of a blockage are often: a hot condenser (only in the initial part), lack of cold in the evaporator and characteristic gurgling or complete absence of sounds of gas flow. In such a situation, the compressor works at its limit, trying to push through the plug, but cannot turn off, since the temperature in the chamber does not drop.
Removing the blockage requires professional intervention. The technician purges the system with nitrogen, replaces the filter-drier (which must be changed whenever the circuit is opened) and refills the refrigerator. It is impossible to carry out this procedure on your own without a vacuum pump and a nitrogen cylinder.
⚠️ Attention: Never try to clean the capillary tube mechanically or with wire. This will lead to damage to the thin walls of the tube and the final failure of the system.
Failures in the electronic control module
Modern refrigerators Biryusa are equipped with electronic control units that coordinate the operation of all components. If the brain of the device receives incorrect data or there is a glitch in its software, it can send erroneous commands to the compressor. For example, the module may not “see” the signal that the desired temperature has been reached and keep the engine on.
Often the cause is power surges in the network that damage board elements. Visually, this may manifest itself in blackening of the tracks, swelling of the capacitors, or the presence of a burning smell in the area of the electronic unit. In some cases, resetting the settings or rebooting the device helps, but more often a repair or replacement of the board is required.
Diagnostics of electronics requires the use of an oscilloscope and in-depth knowledge of circuit design. If you do not have the skills to work with radio electronics, it is better to entrust this stage to the service center specialists. An attempt to independently repair the board can lead to irreversible consequences for the entire electrical part of the refrigerator.
☑️ Initial check before calling a technician
Mode influence “Super freezing”
Sometimes the reason for continuous operation lies not in a breakdown, but in the actions of the user himself. Many models Biryusa have a Super Freeze function. When activated, the refrigerator is forced to work without interruption for a certain time (usually from 24 to 72 hours) to quickly freeze a large volume of food.
If you accidentally turned on this mode, the corresponding indicator may light on the control panel. In this case, the equipment behaves absolutely correctly from a logical point of view, executing your command. It is enough to simply turn off the function, and after some time the operating cycle returns to normal.
However, if the “Super Freeze” mode does not turn off automatically after the time has elapsed or the button is stuck, the compressor will work forever. Check the condition of the buttons on the control panel - they should have a clear movement and not be contaminated with sticky food residues.
When you need to call a specialist
Despite the possibility of self-diagnosis of a number of faults, there are situations when professional intervention is inevitable. If you have checked all external factors, made sure that the thermostat and relay are working properly, but the problem persists, most likely the problem is a sealed circuit or complex electronics.
Working with freon requires a license and special equipment. Incorrect refilling or violation of the vacuum technology will lead to the fact that after a short time the refrigerator will stop cooling again and the compressor will burn out. A qualified technician will perform the work of finding leaks, soldering and refilling in compliance with all technological standards.
It is also worth contacting the service if you are not confident in your abilities when disassembling the unit. Incorrect assembly can disrupt the geometry of the doors or damage fragile plastic elements. Remember that professional repairs are often cheaper than buying a new refrigerator after an unsuccessful experiment.
Why does the refrigerator hum but not freeze?
This is a classic sign of a freon leak or a clogged capillary tube. The compressor is running, trying to create pressure, but the refrigerant is not circulating through the system. Diagnostics of the circuit is required.
Is it possible to operate the refrigerator if it does not turn off?
Short-term - yes, but this will lead to overheating of the compressor and a sharp increase in energy consumption. Long-term operation in this mode reduces the life of the motor by several times.
How much does it cost to replace a thermostat in Biryusa?
The cost consists of the price of the spare part and the work of the technician. On average, replacing a thermostat is cheaper than repairing a compressor, but the exact price can only be found out after diagnostics.
How often should a refrigerator turn off normally?
In normal mode, the refrigerator operates cyclically: it works for about 10-15 minutes and rests for 20-30 minutes. The operating time coefficient is about 0.4-0.5.