Sudden failure of the cooling system in the refrigerator Biryusa often becomes an unpleasant surprise, forcing the owner to guess about the causes of the failure. If the compressor runs continuously or, conversely, does not turn on at all, and the temperature inside the chambers no longer corresponds to the set values, it most likely has failed. This small device is responsible for maintaining a given temperature regime, opening and closing the electrical power circuit of the compressor. thermostat. This small device is responsible for maintaining the set temperature by opening and closing the electrical power supply circuit of the compressor.
Independent replacement of the thermostat is a completely solvable task for a person with minimal skills in handling tools, but requires strict adherence to technique security. Before starting any work, the unit must be completely de-energized by unplugging the plug from the socket to eliminate the risk of electric shock. In this article, we will analyze in detail the process of dismantling the old sensor and installing a new one, paying attention to the nuances specific to refrigeration equipment of the Biryusa brand. The success of the repair largely depends on correct diagnosis and selection of compatible spare parts, since different models can be equipped with different types of thermostats. You should not ignore the symptoms of a malfunction, because operation of the refrigerator in emergency mode can lead to failure of a more expensive compressor or defrosting of food. Let's figure out how to correctly determine the breakdown and safely remove the failed element. Biryusa.
The success of the repair largely depends on correct diagnosis and selection of compatible spare parts, since different models can be equipped with different types of thermostats. You should not ignore the symptoms of a malfunction, because operation of the refrigerator in emergency mode can lead to failure of a more expensive compressor or defrosting of food. Let's figure out how to correctly identify a breakdown and safely remove the failed element.
Diagnostics of a thermostat malfunction
Before you start disassembling the case, you need to make sure that the problem lies in the thermostat, and not in a freon leak or a malfunction of the start relay. The main sign of failure thermostat is incorrect operation of the compressor: it either works non-stop, freezing food to the point of stone, or is silent, allowing the chamber to warm up to room temperature. In some cases, cyclicity is observed, but the intervals of operation and downtime differ significantly from the norm.
For an initial check, you can try turning the regulator knob to different positions. If, when turning, you do not hear the characteristic click that usually accompanies the contacts, this may indicate a mechanical jamming of the internal parts of the device. It is also worth paying attention to the temperature in the refrigerator compartment: if it falls below +2°C or rises above +8°C with standard settings, temperature sensor requires replacement.
⚠️ Attention: If after defrosting the refrigerator during the day the situation has not changed and the compressor behaves inadequate, the probability of a malfunction of the thermostat is more than 80%.
There is a simple test method that requires caution: if, when tapping on the thermostat body or adjustment knob, the compressor suddenly starts or stops, then the contact inside the mechanism is broken. However, you should not rely solely on this method, since it provides only indirect confirmation. A more accurate result will be obtained by checking with a multimeter for the presence of resistance between the contacts, but this will require partial disassembly.
Necessary tools and preparation
For high-quality replacement work thermostat in the refrigerator Biryusa minimal a set of tools that can be found in the arsenal of most home craftsmen. The main requirement is cleanliness of hands and the workplace, since dust or moisture entering electrical contacts is unacceptable. Prepare everything you need in advance so as not to interrupt the process by searching for a screwdriver or pliers.
You will need the following tools and materials:
- 🔧 Screwdrivers: Phillips and flat (different sizes for different screws).
- 🔪 Knife: construction or office (for carefully removing decorative plugs).
- 🔦 Flashlight: for illuminating the internal space of the refrigerator compartment.
- 🧤 Gloves: cotton (to protect hands from sharp metal edges).
- 📏 Pliers: for working with clamps and terminals.
It is important to purchase a new thermostat in advance, completely similar to the failed one. On the body of an old device there is always a marking, for example T-133 or TAM-133that needs to be rewritten. Installing the wrong model can lead to incorrect temperature conditions or rapid re-failure. If an exact copy cannot be found, you can use a universal analogue, but setting it up will require additional knowledge.
Access to the thermostat in different models
The design of refrigerators Biryusa varied depending on the year of manufacture and the specific series, so the location of the thermostat may vary. In most modern models, the control unit and the sensor itself are located inside the refrigerator compartment, often hidden behind a plastic casing or decorative trim. In older modifications, access can be achieved through the rear wall of the unit from the outside.
Let's consider the main location options:
- 🏠 Inside the chamber: the thermostat is located in the upper right corner, often combined with the lighting lamp.
- 🔙 Outside at the back: typical for older models, access through removing the rear metal panel.
- 🧊 In the control unit: in models with electronic control, the mechanical thermostat can be hidden under the panel.
If your refrigerator is equipped system No Frost or has a complex control system, access to the mechanical sensor may be limited. In such cases, it is recommended to check the technical documentation of the specific model, since the design may have unique features. Sometimes, to remove the casing, you need to carefully pry it with a plastic card or a special tool so as not to damage the latches.
⚠️ Attention: The plastic elements inside the refrigerator compartment become fragile in the cold. Before removing the panels, allow them to warm up to room temperature for 15-20 minutes after defrosting.
When removing decorative trims, do not use excessive force. If the element does not budge, check to see if there is a hidden screw under the plug or sticker. Sudden movements can lead to breakage of the plastic mounting ears, the restoration of which will require additional effort and glue.
Step-by-step instructions for dismantling
The process of removing the thermostat requires consistency and care. The first step is always to completely unplug the refrigerator and defrost it. After you have reached the installation site of the device, carefully inspect the fastenings. Usually the thermostat is fixed with screws or special clamps, and its capillary tube is threaded through the sealing hole.
Procedure for dismantling:
☑️ Algorithm for dismantling the thermostat
- Carefully remove the temperature control knob, if it is removable (pull it towards you or unscrew the locking screw).
- Disconnect the wires from the contact group, having previously memorized or photographed their location. Usually the wires are color coded.
- Loosen the capillary tube to the evaporator. It can be pressed with a bracket or secured in a special channel.
- Pull the thermostat carefully, trying not to damage the capillary tube or bend it.
- Remove the device from the seat, opening the insulating sleeve, if any.
Particular attention give capillary tube. It is a thin metal tube containing a temperature-sensitive gas or liquid. If its integrity is damaged, the thermostat will become unusable. It is strictly prohibited to bend the tube at an acute angle, as this may disrupt the circulation of the working fluid inside.
What to do if the capillary tube is stuck?
If the tube is stuck or stuck in the evaporator channel, do not pull by force. Try gently heating the outlet with a hairdryer (without overheating the plastic) or using a lubricant like WD-40 to make sliding easier.
After removing the old sensor, clean the seat from dirt, ice and oxides. Make sure that the tube exit hole is clear and does not have any sharp edges that could damage the new element during installation. Check the condition of the wire insulation: if it is cracked, it must be restored before connecting a new device.
Compatibility and characteristics table
When choosing a replacement, it is important to consider not only the appearance, but also the technical parameters of the thermostat. Different models Biryusa may require thermostats with different capillary tube lengths and response ranges. Below is background information on the most common types of thermostats used in this equipment.
| Thermostat type | Capillary tube length | Temperature range | Compatibility |
|---|---|---|---|
| T-133 | 0.73 m | -24...-14°C | Old Biryusa models |
| TAM-133 | 0.73 m | -24...-14°C | Analog T-133, widely used |
| T-132 | 0.6 m | -20...-10°C | Small refrigerators |
| K-50 | 0.73 m | -24...-14°C | Imported analogues for Biryusy |
| T-140 | 0.73 m | -15...-5°C | Models with increased requirements |
The length of the capillary tube is a critical parameter. If the new tube is longer than the original, the excess can be carefully rolled into a spiral and placed in the free space behind the back wall without bending it. If the tube is shorter, installation may not be possible without loss of tightness or correct positioning of the sensitive element.
When purchasing, pay attention to the number of contacts. Standard thermostats have three terminals, but there are also models with two or four contacts (for indication or additional functions). Using a thermostat with an unsuitable electrical circuit can lead to a short circuit or failure of the defrost system. Always check the connection diagram printed on the device body with yours.
Installing a new thermostat and checking
Installation of a new one thermostat is carried out in the reverse order of dismantling. Insert the sensing tube into the hole as far as it will go, ensuring that it does not get twisted. Secure the device in the mounting location using screws or latches. Connect the wires to the appropriate terminals, observing the color coding or previously made marks.
After assembling all the plastic panels and installing the regulator handle, you can proceed to testing. Plug in the refrigerator. The compressor should start after a while (or immediately, depending on the settings). Let the unit operate for several hours, monitoring the temperature inside the chamber using an external thermometer.
What to look for when checking:
- 🌡️ Temperature mode: the refrigerator should gain cold to the set value and turn off.
- 🔇 Operation sound: should not be extraneous knocking or humming, in addition to the standard noise of the compressor.
- ⚡ Cyclicity: intervals of operation and rest must be uniform and correspond to the norm.
⚠️ Attention: The first full freezing food is possible only after the refrigerator has been empty for 4-6 hours and returns to normal mode.
If the refrigerator does not turn off after reaching a low temperature, a new thermostat may need to be adjusted. Some models have an adjustment screw that can be accessed through a special hole. However, without special equipment and knowledge, it is better not to change the factory settings, but to check the correct installation of the capillary tube.
Frequently asked questions (FAQ)
Can I use a thermostat from another refrigerator on Biryusu?
The use of analogues is possible if the overall dimensions, length of the capillary tube and temperature response range are the same. However, it is better to look for original spare parts or certified analogues specifically designed for refrigerators Biryusato avoid compatibility problems.
Why does the refrigerator not turn off after replacing the thermostat?
There may be several reasons: freon leak, malfunction compressor or incorrect installation of the new thermostat. It is also possible that the capillary tube is not immersed deep enough into the evaporator or is in poor contact with it, which is why the sensor does not sense a real decrease in temperature.
How to understand that the thermostat is “stuck”?
If when you turn the regulator knob you do not hear a click, and the compressor continues to work or is silent, most likely the contacts inside are “stuck.” Sometimes lightly tapping the thermostat body helps, but this is a temporary measure - the device requires replacement.
Is it necessary to charge the system with freon after replacing the thermostat?
No, replacing the thermostat does not require intervention in the sealed refrigerant circuit. Freon remains inside the system, and a violation of its volume or pressure during this operation does not occur if you did not damage the evaporator tubes during dismantling.