The situation when a refrigerator Biryusa suddenly stops freezing can take any home cook by surprise. Products begin to deteriorate, and water appears on the shelves or, conversely, the cold disappears. Most often, owners are faced with the fact that the camera is working, but the temperature inside does not drop below room temperature. This is a signal that there is a failure in the refrigerant circulation system or compressor control.
You should not immediately panic and call a technician, since in many cases the problem lies in simple things that you can fix yourself. For example, an incorrect thermostat setting or a clogged drain can simulate a serious breakdown. However, if simple methods do not help, it is necessary to conduct a more in-depth diagnosis of the unit components.
In this article we will examine in detail the main reasons why equipment Biryusa may fail. We will consider both mechanical and electrical faults, and also give a clear algorithm of actions to eliminate them. Understanding the operating principle of your refrigerator will help save time and money on repairs.
Primary diagnostics and external factors
Before disassembling the unit, it is necessary to eliminate common operating errors. Users often wonder why the refrigerator does not freeze, without noticing obvious things. First of all, check the tightness of the door. If the rubber seal is dirty or deformed, warm air constantly enters the chamber and the system does not have time to cool it.
It is also worth paying attention to the location of the equipment. If Biryusa stands close to a wall or furniture, air circulation around the condenser is disrupted. The compressor overheats and goes into protection mode, stopping pumping freon. Leave a gap of at least 5-10 cm on all sides for normal operation.
⚠️ Attention: If you have just moved the refrigerator, do not plug it in for at least 2-3 hours. The oil must drain into the compressor crankcase, otherwise starting can lead to water hammer and engine breakdown.
Check the temperature settings. Some electronically controlled models may have malfunctioned and accidentally set the temperature to minimum cool or holiday mode. Make sure that the indicators on the panel are lit correctly.
Malfunctions of the thermostat and sensors
One of the most common reasons why Biryusa refrigerator it does not freeze is the failure of the thermostat. This element is responsible for turning the compressor on and off depending on the temperature in the chamber. If it is “stuck” in the “off” position, the motor simply will not start.
In models with a drip defrosting system, the defrost sensor often breaks. It controls the temperature of the evaporator. If the sensor shows incorrect data, the heating element may not turn on in time, and the evaporator becomes overgrown with a “coat” of ice, blocking the cold. In units with a system No Frost a defrost timer or defrost sensor is responsible for this.
- 🔍 Check the integrity of the wires going to the sensors - they could be chewed by rodents or damaged during defrosting.
- ❄️ Ring the thermostat with a multimeter: in a cold state, the contacts must be closed (or open, depending on the type).
- ⚙️ Replace the faulty sensor with a similar one with the same resistance parameters.
To replace the thermostat in mechanical models Biryusa often it is necessary to remove the top cover or plastic panel inside the chamber. Be careful with the capillary tube of the sensor - it is very thin and can be easily snapped. When installing a new element, the sensitive end must fit tightly to the evaporator.
Problems with the starting relay and compressor
If you hear that the compressor is trying to start, makes a click and immediately turns off, most likely the problem is in the starting relay or the motor itself. A relay is a small plastic block that fits onto the contact group of the compressor. Inside it there is a starting coil and a posistor, which wear out over time.
The fault can be diagnosed visually: if burning marks, black spots are visible inside the relay, or the smell of melted plastic is felt, the part requires replacement. This is a consumable item, and replacing it does not require calling a technician. The main thing is to choose a relay with a suitable power range for your compressor.
⚠️ Attention: Before any work on the electrical part, be sure to unplug the refrigerator! Electric shock can be fatal.
A more serious problem is a burned out compressor. If the motor hums but does not start, or it is silent, but the relay is working properly, an interturn short circuit of the windings may have occurred. In this case, a professional replacement of the unit is required with evacuation of the system and refilling with freon.
☑️ Diagnostics of the starting relay
Freon leakage and clogged capillary tube
When the refrigerator Biryusa works continuously, It hums, but does not produce cold air; a refrigerant leak is often to blame. Freon can escape through microcracks in the evaporator (especially if it was cleaned with sharp objects) or in places where the circuit is soldered. Without a sufficient amount of gas, heat exchange does not occur.
Another common problem is a clogged capillary tube. Plugs from oil or moisture oxidation products form in the circulation system. This prevents the normal flow of freon. A characteristic sign of a blockage is a hot condenser (grid at the back) only in the upper part, while the lower part remains cold.
It is almost impossible to eliminate these faults on your own, since special equipment is required: a vacuum pump, a pressure gauge station and scales for refueling. Attempts to simply “add gas” without looking for a leak will only give a temporary effect.
How do craftsmen look for a leak?
The craftsmen use gas analyzers or the “soap suds” method (they wash all the joints and wait for bubbles). In difficult cases, the system is filled with nitrogen under pressure and lowered into a bath of water, observing the release of bubbles.
The table below shows the main symptoms and probable causes of problems with the refrigerant:
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| The compressor works constantly, there is no cold | Freon leakage | Looking for leaks, soldering, vacuuming, refilling |
| Humming, clicking, no start | Clogged capillary tube | Purge with nitrogen, replace the filter-drier |
| Bloating of the rear wall inside the chamber | Corrosion of the evaporator | Replacement of the evaporator or installation external |
Failures in the electronic control module
Modern models Biryusa are equipped with electronic control units. If the control board is faulty, it may not send a signal to start the compressor or fan. This often happens after power surges or thunderstorms.
Visually swollen capacitors or blackened traces may be visible on the board. However, even if the board is externally intact, microcircuits or relays could burn out. Module repair requires soldering skills and knowledge of circuit design. In most cases, it is easier and more reliable to replace the entire unit.
Sometimes the problem is solved by rebooting the “brains” of the refrigerator. To do this, you need to disconnect the equipment from the network for 15-20 minutes. If after switching on the errors disappear and the cold appears, then a software failure has occurred.
Ventilation and No Frost system
In refrigerators with a system No Frost a fan is responsible for circulating cold air. If it stops spinning, the cold remains in the freezer (where the evaporator is located), but does not enter the refrigerator compartment. As a result, it is warm in the main chamber, and severe frost in the freezer.
The reason for the fan stopping may be icing of the blades. If the defrost system does not work correctly, ice freezes on the shaft and blocks rotation. The fan motor itself could also burn out or the wiring going to it could break.
- ❄️ Defrost the refrigerator completely (at least 24 hours) and check if the fan starts working.
- 🌀 Clean the blades from ice and dirt.
- 🔌 Check the voltage at the fan contacts while the compressor is running.
⚠️ Attention: Do not try to defrost ice on the fan with a hairdryer or hot water directly in the chamber. Water may flow into the electrical part and cause a short circuit. It is better to let the ice melt naturally.
Frequently asked questions (FAQ)
Why does the Biryusa refrigerator only freeze in the freezer, but is it warm in the main chamber?
Most likely, The blower fan is faulty (in No Frost models) or the air supply channel is clogged with ice. A freon leak is also possible when there is only enough gas for the first cooling circuit.
A hum is heard, but there is no cold - what to do?
The hum of a running compressor without cooling indicates that freon is not circulating. This could be a clogged capillary tube, a compressor failure (does not create pressure) or a complete gas leak. Diagnostics by a specialist is required.
How often do you need to defrost the Biryusa refrigerator?
Models with manual defrosting require shutdown once every 3-6 months, when the ice layer reaches 5 mm. Drip defrosting and No Frost systems do not require regular defrosting, but it is useful to do preventive cleaning once a year.
Is it possible to replace the thermostat yourself?
Yes, if you have basic skills and tools. The main thing is to choose the right model (according to the length of the tube and the temperature range) and carefully install the sensitive element without bending the capillary.
Why does the refrigerator not get cold for a long time after defrosting?
In the first hours after switching on, the compressor works in enhanced mode. Complete cooling of the chamber volume may take from 4 to 12 hours. If after 24 hours the temperature does not drop, the seal may be damaged or there is a leak.