Modern brand refrigerators Biryusa, equipped with a No Frost system or drip defrosting, are complex units where each element plays a strictly defined role. One of the key components that ensure stable operation of the freezer and refrigeration chambers is heating element. Many owners of household appliances mistakenly believe that there should only be cold in the refrigerator, but without periodic local heating the device will simply stop functioning after a few weeks of operation.
In this article we will look in detail at what exactly it is heater in the Biryusa refrigeratorwhy it is needed in the automatic defrosting system and how to understand that this unit has failed. Understanding the operating principle of a heating element (tubular electric heater) will help you avoid costly repairs to the compressor, which often suffers due to improper operation of the defrost system. We will look at the design, types of heaters and the algorithm for replacing them.
The main task of this element is to prevent the formation of an ice crust on the evaporator, which blocks air circulation. If you notice that Biryusa refrigerator has stopped freezing, but is still humming and consuming electricity, the problem may lie in the defrost system. Let's look at the design of this unit in more detail so that you can diagnose the malfunction yourself.
The operating principle and purpose of the defrost heater
The defrost heater in refrigerators Biryusa is an electrical device that transforms electrical energy into thermal energy to melt the ice accumulated on the evaporator. In models with a system No Frost this process occurs automatically according to a timer, usually every 8–12 hours of compressor operation. Without this mechanism, moisture entering the chamber with food and when the door is opened would turn into ice, completely blocking the air circulation channels.
When the timer gives the command to start the defrosting cycle, the compressor and fan stop and turn on Defrost heating element. It heats the evaporator fins to a temperature at which the ice melts and the water flows into a special tray. It is important to understand that the heater operates for a very short time - usually from 15 to 30 minutes, after which the thermostat or sensor turns it off and the cooling cycle resumes.
In refrigerators with a drip system (crying evaporator), the heater can perform an auxiliary function, for example, heat the capillary tube or doorway to prevent the seal from freezing. However, in the context of the system No Frost we are talking about a powerful element located directly in the freezer compartment behind the rear panel.
⚠️ Attention: If the defrost heater burns out, the ice will stop melting and will begin to build up in layers. After 2-3 weeks, this will cause the fan to start making noise, hitting the ice porridge with its blades, and the cold will stop flowing into the refrigeration chamber.
Main types of heaters using the Biryusa technique
Depending on the model and year of manufacture, refrigerators Biryusa can use different types of heating elements. Plant engineers use different solutions to optimize energy consumption and reliability. The most common are tubular heaters (heating elements), which are a metal tube inside which a nichrome spiral is insulated with compressed magnesium oxide.
In addition to classic heating elements, some modern models can use glass heaters or heaters in a silicone shell. They have lower energy consumption and reach operating temperature faster, but require more careful installation. Also, the design of the defrost system often involves a drain heater, which prevents the water from freezing in the drain channel.
The power of the main evaporator heaters usually varies from 150 to 400 Watts, while the auxiliary elements (for the capillary tube or drainage) have a power of about 10–30 Watt. When selecting spare parts for Biryusa refrigerator it is critically important to take into account not only the length and shape, but also the power declared by the manufacturer, so as not to overload the wiring or timer.
Is it possible to install a heater of higher power?
Installing a more powerful heating element will lead to to accelerated defrosting, but can cause overheating of the plastic parts of the evaporator housing and melting of the drain funnel. Use only original or analogues that exactly match the parameters.
Symptoms of a heating element failure
Diagnostics of a heater failure in a Biryusa refrigerator does not always require sophisticated equipment, since the symptoms often manifest themselves clearly. The first sign is a violation of the temperature regime: food in the refrigerator begins to deteriorate, although everything in the freezer seems to be frozen. This happens because the ice coat on the evaporator blocks the airflow. in the refrigerator, Biryusa does not always require sophisticated equipment, since the symptoms often manifest themselves clearly. The first sign is a violation of the temperature regime: food in the refrigerator begins to deteriorate, although everything in the freezer seems to be frozen. This happens because the ice coat on the evaporator blocks the airflow.
The second characteristic sign is the appearance of extraneous sounds. When the layer of ice becomes too thick, it begins to interfere with the fan's operation. You may hear cracking, grinding, or humming noises coming from the freezer. This means that the fan blades are touching ice, and the defrosting system is not doing its job.
The third symptom is water on the floor near the refrigerator or inside the lower drawers. If the ice does not have time to melt and go into the drainage within the allotted time, excess water overflows the pan and flows out. There may also be continuous operation of the compressor, which tries to compensate for the lack of cold, which leads to increased energy consumption.
- 🧊 A thick layer of ice or a snow coat is visible on the back wall of the freezer, although this has not been observed before.
- 🔊 The fan makes a loud noise, crackling or vibration when work.
- 💧 Water accumulates at the bottom of the refrigerator compartment or flows out from under the door onto the floor.
- 🌡️ The compressor works non-stop, trying to gain temperature, but fails.
Diagnostics: how to check the heater multimeter
Before buying a new part, you need to make sure that the defrost heating element is faulty Defrost heating element. To do this, you will need a multimeter and access to the inside of the freezer. Remember that all diagnostic work is carried out only with the power supply completely disconnected from the mains in order to avoid electric shock.
First you need to dismantle the back panel of the freezer (in some models Biryusa it is necessary to defrost the unit for 24 hours so that the ice does not interfere with removing the plastic). Locate the heater - it is usually located under the evaporator or surrounds its lower part. Visually inspect the element: if swelling, ruptures or traces of corrosion are visible on the tube, the part definitely requires replacement.
For an electrical test, switch the multimeter to resistance measurement mode (Ohm). Connect the probes to the heater contacts. A working element should show a resistance in the range from 100 to 400 Ohms (depending on power). If the device shows “1” or infinity, the circuit is broken and the heater has burned out. If it shows “0”, a short circuit has occurred.
☑️ Checking the heating element
Compatibility table and characteristics of heaters
When ordering spare parts for Biryusa refrigerator it is important to focus not only on the name of the model, but also on the physical parameters. A plant may use different components in the same series. Below is a table with approximate characteristics of heaters for popular series.
| Biryusa series | System type | Power of the heating element, W | Location |
|---|---|---|---|
| Biryusa 133, 134 | No Frost | 210–250 | Under the evaporator |
| Biryusa 6 (series K) | No Frost | 180–220 | Along the pipes |
| Biryusa 108, 110 | Drip | 30–50 (drainage) | In the drainage funnel |
| Biryusa 355 | No Frost | 240–280 | Encircling |
Please note that the parameters may vary depending on the specific modification and year of manufacture. It is critically important before purchasing to measure the length of the old heater and the distance between the mounting holes, since even a discrepancy of 5 mm can make installation of a new part impossible without modifications.
Instructions for replacing the heater with your own hands
Replacing the heater in Biryusa refrigerator —a procedure of medium complexity, requiring accuracy and a minimal set of tools (screwdriver, pliers, multimeter). Before starting work, make sure that the device is defrosted and dry. First, remove all shelves and drawers from the freezer to gain access to the back wall.
Unscrew the screws holding the plastic panel in place and carefully remove it. If the panel is frozen, don't try to force it off - use a hair dryer to warm up the plastic a little, but don't direct the hot air at the foam insulation of the case. Find the burnt out heater, disconnect the terminals and unscrew the mounting brackets or clamps.
Install the new element in the same configuration as the old one. It is important to securely fix the contacts to prevent sparking. Reassemble the structure in reverse order: install the panel, return the drawers and plug in the refrigerator. The first defrost cycle may take longer until the system stabilizes.
⚠️ Attention: When assembling, make sure that the heater wires do not touch the plastic walls of the case or moving parts of the fan. Vibration during operation can grind the insulation, which will lead to a short circuit.
Frequent errors during repair and maintenance
One of the common mistakes during repair Biryusa refrigerators is replacing only a burnt-out heater without checking other elements of the defrost system. Often, along with the heating element, the defrost sensor or timer fails. If you replace only the heater, the new element may burn out in a month due to improper operation of the control electronics.
Another mistake is the use of inappropriate analogues. Some craftsmen try to install universal heaters by bending them to the desired size. This is strictly prohibited for heating elements in a glass shell or with a rigid structure, since a violation of the geometry leads to destruction of the internal spiral and rapid failure.
Also, users often ignore the cleanliness of the drainage hole. Even a working heater will not help if the drain tube is clogged with dirt or mold. Water will accumulate and freeze, creating the appearance of a breakdown of the defrost system. Regular maintenance and drainage cleaning will help avoid many problems.
- 🚫 Ignoring checking the defrost temperature sensor when replacing the heating element.
- 🚫 Trying to straighten or bend a rigid tubular heater.
- 🚫 Lack of integrity check wiring and terminal connections.
- 🚫 Forgotten cleaning of the drainage channel before installing new parts.
How often should the heater be changed? Biryusa refrigerator?
The heater is not a consumable item with a fixed service life. Under normal use, it lasts 10–15 years or more. Replacement is required only in case of failure (burnout of the spiral) or mechanical damage.
Is it possible to temporarily operate a refrigerator without a heater?
Technically, the refrigerator will work, but only in constant manual defrosting mode. You will have to unplug it every 5-7 days, defrost it completely, and plug it back in again. Long-term operation without defrosting will lead to failure of the compressor.
Why does a new heater burn out immediately after installation?
Most often, the reason lies in a faulty defrost sensor, which does not give the command to turn off the heating element, and it overheats. It is also possible that there is a short circuit in the wiring or the use of a part with the wrong voltage.
Where can I find the heater markings for Biryusa?
The marking is usually applied to the metal tube of the heating element itself or on a tag attached to the wiring. If the inscription is erased, look for the part number in the service documentation or according to the refrigerator model from official dealers.
Do you need to lubricate the heater contacts?
It is not the electrical contacts that need to be lubricated, but the places where the heating element adheres to the evaporator (using thermal paste). Electrical terminals must be dry and tightly clamped. Moisture or grease on the contacts is unacceptable.