Two-chamber refrigerator models Biryusa have earned a reputation as reliable equipment that can operate for years without serious failures. However, even the highest quality assembly over time requires user intervention to maintain optimal storage conditions for products. Often, owners are faced with the need to adjust the temperature or eliminate a loose door fit, which directly affects energy consumption and the service life of the compressor.
Correct setting allows you to avoid problems such as the formation of an ice crust, insufficient cooling, or, conversely, freezing of vegetables in the lower compartment. Unlike modern electronic systems, mechanical thermostats Biryusa require periodic manual calibration and careful attention to the position of the regulator. Understanding the principles of operation of this unit will help you avoid calling a specialist for simple operations.
In this article we will analyze in detail the process of setting the temperature mode, adjusting the position of the door and replacing the seal. You will learn how to correctly interpret the indicator signals and when it is really necessary to intervene with the thermostat. A competent approach to maintenance will extend the life of your refrigerator and preserve food freshness.
The principle of operation of the thermostat in Biryusa models
The main element of climate control inside the chamber is the thermostat, or thermostat. Most two-chamber models Biryusa use a mechanical type of regulator that responds to changes in evaporator temperature. Inside the device there is a sensitive tube filled with gas or liquid, which contracts when cooled and expands when heated, closing or opening the electrical contacts of the compressor.
The user sets the desired mode of rotation of the handle, which mechanically changes the spring force inside the thermostat. This force determines at what temperature the power circuit will break. It is important to understand that the numbers on the scale (usually 1 to 5 or 1 to 7) do not represent degrees Celsius. They indicate the intensity of cooling: the higher the number, the lower the temperature inside the chamber and the longer the compressor works.
- 🌡️ Number 1 - minimum cooling, the compressor rarely works, the temperature in the chamber is closer to +8...+10°C.
- ❄️ Number 3-4 is the optimal mode for everyday use, providing +2...+5°C.
- 🧊 Number 5-7 (or Max) is intensive freezing mode, the temperature can drop below 0°C, which is dangerous for vegetables.
Incorrect setting of the regulator to maximum in the summer leads to continuous operation of the motor and its overheating. Mechanical thermostats Biryusa are sensitive to external conditions, so seasonal adjustment of the handle position is a mandatory procedure to save energy.
Adjusting temperature conditions by season
The environment has a direct impact on refrigerator heat exchange. In the summer, when the temperature in the kitchen is high, the insulation works less effectively and the compressor has to work harder. In winter, the situation changes: cold air in the room facilitates heat removal, but can lead to insufficient operation of the system in models with one cooling circuit.
For the summer period, it is recommended to set the regulator to position 3 or 4. This will maintain a stable temperature without overloading the motor. If you notice that the food in the main chamber is thawing, you can temporarily increase the value, but you should not set the knob to maximum, as this can lead to freezing of the evaporator and difficulty dissipating heat.
⚠️ Attention: Setting the regulator to the maximum value (5-7) is only permissible for a short time to quickly freeze products. Constant operation in this mode reduces the life of the compressor Biryusa.
In winter, if the refrigerator is in an unheated room or in a cold kitchen, heat exchange is disrupted. In such cases, it may be necessary to set the regulator to lower values (2 or 3) so that the motor operating cycles are not too short. However, modern models are designed to operate at ambient temperatures up to +10°C, and below this threshold the equipment may not work correctly.
Adjusting the position of the door and hinges
One of the common problems faced by owners of two-chamber refrigerators is a loose door fit. This may be caused by a skewed housing, loose mounting bolts, or deformed hinges. If the door is skewed, cold air escapes out, and the compressor runs non-stop, trying to compensate for heat loss.
To eliminate the skew, it is necessary to conduct a visual inspection. Open the door and look at the gap between the seal and the body around the entire perimeter. If the gap is wider at the top than at the bottom, or vice versa, then the tilt needs to be adjusted. Some models Biryusa are provided with adjustable supports at the bottom of the case, which allow you to level the equipment horizontally.
The process of adjusting the hinges usually involves the following steps:
- Empty the refrigerator of food and remove the top cover (if there is one) for access to the top hinge fastenings.
- Using a wrench (usually 10 mm), loosen the top hinge mounting bolts, but do not remove them completely.
- Align the door visually or using a level, achieving a uniform gap.
- Tighten the bolts and check the tightness of the fit, closing door on a sheet of paper: it should be pinched around the entire perimeter with the same force.
☑️ Checking the door geometry
Replacement and restoration of the magnetic seal
The rubber seal (gasket) plays a critical role in the tightness of the chamber. Over time, the material loses its elasticity, cracks or deforms, no longer adhering tightly to the metal. As a result, cold air leaves, and warm and humid air penetrates inside, causing the formation of condensation and ice.
If you find that the seal has come off or become hard, you can try to restore it. To do this, it is enough to heat the deformed areas with a hairdryer (without overheating until it melts) or pour boiling water over them, and then press firmly against the body until it cools. This method helps straighten out small creases and return the rubber to shape.
| Type of defect | Symptom | Elimination method | Required tools |
|---|---|---|---|
| Contamination | Weak pressure, dirt at the joint | Wash with warm water and soap | Sponge, mild detergent |
| Deformation | Waves on rubber, gaps | Warming with a hairdryer or boiling water | Hairdryer, container with hot water |
| Cracks | Destruction of the rubber structure | Complete replacement of the seal | New gasket, screwdriver |
| Detachment | The edge does not stay in the groove | Gluing or replacement | Glue for rubber (rarely) |
In case of serious damage, such as deep cracks or tears, restoration is not possible. You must purchase an original seal for your model Biryusa. Installing a new gasket requires care: it is inserted into a special groove around the perimeter of the door and fixed with plastic latches or glue, depending on the design.
Where can I find the model code to order spare parts?
The model code (for example, Biryusa-6) is usually indicated on a nameplate inside the refrigerator compartment on the side wall or on the rear wall of the case. The number may also be in the product passport or warranty card.
Diagnostics of cooling problems
Sometimes users try to “adjust” the refrigerator when in fact there is a technical malfunction in it. If changing the position of the thermostat does not produce results, or the temperature in the chambers behaves unpredictably, the problem may not be in the settings, but in the breakdown of components.
You should pay attention to the nature of the compressor's operation. If it turns on for a few seconds and immediately turns off (clicks), or vice versa, it works around the clock without interruptions, even with the minimum thermostat setting, these are signs of a malfunction. Also an alarming signal is the lack of cold in one of the chambers while the other is operating normally (in models with No Frost, this may indicate a problem with the fan or clogged ducts).
- 🔊 A loud knocking or humming noise during startup may indicate problems with the start relay or the compressor itself.
- 💧 A large amount of water under the refrigerator often indicates clogging of the drainage hole, and not about the wrong temperature.
- ❄️ A snow coat only on the back wall when the fan is running (in No Frost) indicates a malfunction of the defrosting system.
⚠️ Attention: If you hear a burning smell or see sparking in the area of the thermostat or compressor, immediately turn off the refrigerator from the network. Further operation is prohibited to avoid a fire.
Frequent errors during self-adjustment
In an effort to quickly get the equipment working, owners often make mistakes that aggravate the situation. The most common of them is to set the regulator to maximum when turning it on for the first time or after defrosting. This creates an excessive load on the system, which is already operating under stress.
Another mistake is ignoring the location of the refrigerator. If the equipment is placed close to a wall or in a niche without gaps for ventilation, heat will not be removed from the condenser. In this case, no adjustment of the thermostat will help: the refrigerator will overheat and the compressor will wear out. It is necessary to provide a gap of at least 5-10 cm from the back wall to the furniture.
Also, do not frequently and sharply turn the thermostat knob. Mechanical contacts need time to stabilize. Sharp shifts can lead to contact sticking or accelerated wear of the mechanism. It is better to change the mode smoothly, with an interval of several hours between turns of the knob.
Why does the Biryusa refrigerator not turn off after adjustment?
If after installation When the regulator is turned to the middle position, the compressor continues to work without stopping, there may be several reasons. First, check the tightness of the door - perhaps warm air is constantly flowing inside. Secondly, the thermostat bulb itself could have failed or its contacts may have become “stuck” in a closed state. Thirdly, a refrigerant leak is possible: the compressor is trying to increase the temperature, but due to a lack of freon, it cannot do this. In the latter case, you need to call a technician for refilling.
Is it possible to replace a mechanical thermostat with an electronic one?
Theoretically, this is possible, but it is technically difficult and economically impractical for refrigerators Biryusa. It will be necessary to completely redo the control circuit, select sensors and a controller. Standard mechanical thermostats (for example, TAM-133) are reliable, cheap and easy to change. Replacing with electronics will not provide a significant gain in energy efficiency for older models, but will create a lot of problems with compatibility.
How often do you need to defrost a two-chamber Biryusa?
The frequency of defrosting depends on the cooling system. If you have a model with manual defrosting (drip system in the refrigerator compartment and an open evaporator in the freezer), you need to defrost as ice forms, but at least 1-2 times a year. Models with the system No Frost do not need defrosting, but it is recommended to turn them off once a year for hygienic washing and drying.