Finding the location of the thermostat in refrigerators Biryusa is the first and most important step if you are faced with incorrect operation of the equipment. The owner may notice that the unit has stopped freezing or, conversely, has frozen the food to a “stone” state. Often the problem lies precisely in thermostat, which has stopped sending the correct signals to the compressor. Understanding where exactly it is hidden will save you time on diagnostics and, perhaps, avoid an expensive call to the technician.
The location of this unit directly depends on the year of manufacture of your refrigerator and its design features. In older models, access to the adjustments and the sensor itself is open inside the chamber, while modern units often hide electronic control units or hidden mechanical thermostats behind panels. Temperature mode directly depends on the serviceability of this element, so finding it requires care and compliance with safety precautions.
In this article we We will analyze in detail how to find a thermostat in various series of refrigerators Biryusa, including two-chamber and single-chamber models. You will learn how to properly dismantle the old sensor, what to pay attention to when installing a new one, and what nuances exist in different modifications. A competent approach to repair of household appliances allows you to extend the life of the device and preserve the freshness of products.
Types of thermostats in Biryusa refrigerators
Before Before you start searching, you need to understand what type of temperature controller you are dealing with. Refrigerators Biryusa historically used two main types of devices: mechanical capillary thermostats and modern electronic sensors. The mechanical version is a device with a long capillary tube, which is filled with a temperature-sensitive gas or liquid. The principle of its operation is based on the expansion and contraction of the working fluid, which closes or opens electrical contacts.
Electronic control systems, which are increasingly found in new models, do not have a visible “twist” inside the chamber. Instead of a mechanical pin, a thermistor or thermocouple is used here, transmitting data to the main control unit. Such systems are highly accurate, but their diagnosis requires a multimeter. Understanding the type of regulator you have is critically important, since the methods for finding and replacing them are radically different.
You can determine the type of regulator by the presence of a rotary knob inside the refrigerator compartment. If there is a knob, you have a mechanical thermostat. If there is a smooth wall inside the chamber, and the temperature is controlled through a display on the door or hidden buttons, we are talking about an electronic system. In the latter case, temperature sensor may be in a completely unexpected place, often hidden behind decorative panels.
- 🔧 Mechanical thermostats of the TAM or K-59 series are a classic for most Biryusa models, easy to replace with your own hands.
- 📡 Electronic sensors are compact elements that require disassembling the housing to access the contact group.
- ⚙️ Combined systems - found in rare cases, where the mechanics are duplicated by electronics for control.
Location in single-chamber models
In classic single-chamber models refrigerators Biryusathat were produced in Soviet times and in the early 90s, the thermostat is the easiest to find. It is almost always located inside the refrigerator compartment. Pay attention to the upper right part of the chamber or the area above the door. Often the device is hidden behind a plastic casing that is secured with latches or screws. Having removed this cover, you will see yourself thermostat with a suitable adjustment handle.
The design may vary depending on the specific series. In some models, the regulator handle is located directly on the front panel of the case, and the mechanism itself is located behind it. In other cases, the entire structure, including the capillary tube, goes deep into the wall or evaporator. When dismantling, it is important not to damage the thin capillary, since damage to it will lead to leakage of the working substance and the impossibility of further operation of the thermostat.
⚠️ Attention: Before starting any work to find the thermostat, be sure to disconnect the refrigerator from the power supply! Even if you only plan to remove the plastic cover, the risk of a short circuit or electric shock due to careless movement is high.
If the regulator handle is located inside the chamber on the wall, then the thermostat housing itself is located immediately behind it. To access the contacts, you will need to carefully pry the handle with a flat screwdriver or a knife, and then unscrew the fastening screws. Electrical diagram in such models it is simple: the current flows from the plug through the thermostat directly to the compressor and the light lamp, so an error in connecting the wires during replacement is unlikely, but it is impossible to confuse the ground and phase contacts.
Where to look in two-chamber refrigerators
In two-chamber models Biryusa the situation is a little more complicated, since space is used more efficiently, and the design often does not involve visible controls inside the chamber. In most cases, the thermostat is hidden behind a lampshade or behind a decorative panel on the ceiling of the refrigerator compartment. To get to it, you need to carefully remove the plastic box in which the light bulb is installed.
The process of removing the lampshade usually does not require tools: just press on special latches or carefully pry off the plastic cover. Below this you will see a thermostat, often attached to a metal bracket. The capillary tube in such models can be attached to the evaporator or passed through the chamber wall. It is important to remember exactly how it is bent so that during assembly you do not bend it, which can lead to breakage.
In models with the No Frost system (although this is rare for Biryusa, a drip system is more common) the sensors can be located in the evaporator area, access to which is possible only after removing the back wall inside the chamber or even the outer casing at the back of the refrigerator. If you do not find the regulator in the lampshade area, check the technical documentation for your specific model Biryusa, since the layout of the components may vary.
- 💡 Remove the lampshade - this is the most common “hiding place” for thermostats in two-chamber rooms.
- 🔩 Check the fastenings of the back wall inside the chamber - sometimes the sensor is hidden behind it.
- ❄️ Pay attention to the evaporator - the end of the capillary tube should be in close contact with its surface.
Nuances of the capillary tube
The capillary tube is a thin copper conductor containing a sensitive agent inside. Under no circumstances bend it at an acute angle or allow creases to appear. Even a microscopic crack will lead to failure of the thermostat, as the gas will evaporate and the contacts will no longer close. When installing a new thermostat, try to repeat the bends of the old device.
Instructions for dismantling the thermostat
The process of replacing the thermostat requires accuracy and consistency of actions. Once you have determined the location of the device and made sure that the refrigerator is unplugged, you can begin dismantling. The first step is always to remove the temperature control knob. It can fit very tightly, so use a flathead screwdriver under the cloth to avoid damaging the plastic.
Next, you need to unscrew the screws that secure the thermostat housing to the refrigerator wall or mounting plate. Be careful: the screws may be corroded or have licked heads. After removing the fasteners, carefully pull the thermostat housing out. Now your task is to disconnect the electrical wires. It is recommended to take a photo of the connection diagram before doing this or mark the wires with a marker so as not to confuse them when installing a new element.
The most delicate stage is removing the capillary tube from the seat. It can be glued or clamped in a special hole. Don't pull too hard! Carefully release the entire length of the tube that runs inside the refrigerator body. If the tube is stuck, you can use a little silicone grease, but avoid aggressive solvents that can damage the plastic or wire insulation.
☑️ Thermostat replacement algorithm
After removing the old device inspect the seat. There should be no moisture, ice or signs of corrosion. If you find oxides on the contacts, clean them with fine sandpaper or alcohol. The new thermostat must be installed in compliance with all bends of the capillary tube. Tightness The hole through which the tube passes is also important: if there was a seal there, make sure it is in place.
Diagnostics of thermostat faults
Before buying a new part, you should make sure that the problem lies in the thermostat. There may be several symptoms of a malfunction: the refrigerator does not turn on at all, the compressor runs non-stop, or the temperature inside the chamber does not correspond to the set temperature. For an accurate diagnosis, you will need a multimeter. In a cold state (if you remove the thermostat from the refrigerator and cool it), the contacts should be closed, and when heated in your hands, they should open (or vice versa, depending on the type).
If the compressor hums, but does not start, and a click is heard, this may indicate a start relay, but often the cause is sticking of the thermostat contacts. A visual inspection also helps: if you see melted plastic, sparking, or smell a burning smell in the area of the regulator, it needs to be replaced immediately. Operating a refrigerator with a faulty automation can lead to compressor combustion.
| Symptom | Probable cause | Action |
|---|---|---|
| The refrigerator does not turn on | Open circuit in the thermostat | Check with a multimeter, replacement |
| Continuous operation of the compressor | Contacts do not open | Replacing the thermostat |
| Weak cooling | Incomplete contact closure | Adjustment or replacement |
| Ice in the refrigerator compartment | Thermostat does not turn off the cold | Checking calibration, replacement |
Frequent replacement errors and expert advice
Many refrigerator owners Biryusa, trying to save on repairs, make typical mistakes that lead to repeated breakdowns. One of the most common is incorrect installation of the capillary tube. Its sensitive end should fit tightly to the surface of the evaporator. If there is a gap between the tube and the metal of the evaporator, the thermostat will “lie” about the temperature in the chamber, which will lead to incorrect operation.
Another mistake is ignoring grounding. The thermostat housing often has a special screw or terminal for connecting the ground wire (usually the yellow-green wire). If you do not connect it, if the insulation breaks down, dangerous voltage may appear on the refrigerator body, and the electronics (if any) may fail. Safety should be priority number one.
⚠️ Attention: The characteristics of thermostats may vary depending on the year of manufacture of the refrigerator. Thermostats designed to work with R12 freon may not work correctly with modern R600a refrigerants, although they are similar in appearance. Always check the markings and temperature range of operation.
It is also worth mentioning the cleanliness of the contacts. When installing a new regulator, make sure the terminal blocks are clean and dry. Moisture should not get into the electrical part of the thermostat. If you see that the wires are melted, replace the terminals too. Reliable contact is the key to long-term operation of the compressor and stable temperature.
FAQ: Frequently Asked Questions
Is it possible to replace the Biryusa thermostat with an analogue from another refrigerator?
Yes, this is possible, but only if the temperature response parameters and the length of the capillary tube coincide. For example, TAM-133 thermostats are often interchangeable with K-59, but you need to carefully read the labeling. There are no universal solutions, it is better to look for the original or a complete analogue by catalog number.
Why does the refrigerator not turn off after replacing the thermostat?
Most likely, the capillary tube is installed incorrectly. Its sensing element must be in close contact with the evaporator. If it hangs in the air of the chamber, the thermostat “thinks” that the refrigerator is warm and does not give the command to turn off. Check the tube fastening.
Where is the thermostat located if there is no handle inside the chamber?
In such models, the thermostat (or sensor) is most often hidden behind the lampshade or behind the decorative panel on the ceiling of the refrigerator compartment. In rare cases, it may be located outside, behind the refrigerator, in the area of the compressor, but this is typical for very old or specific industrial models.
How to understand that it is the thermostat that is broken and not the compressor?
Close the contacts of the thermostat directly (after disconnecting from the network!). If the compressor starts working after being plugged in, it means the problem is in the thermostat. If the compressor is silent or hums, but does not start, the problem is in the start relay, compressor or wiring.