The situation when you open the door, and it’s light and warm inside, can take any owner of household appliances by surprise. It’s especially a shame if it’s a reliable two-chamber Biryusa refrigeratorthat has served faithfully for many years. The absence of a humming motor and no reaction to being plugged into the network is the first signal that a failure has occurred in the system that requires immediate attention.
Before you panic and call a technician, it is necessary to carry out an initial diagnosis. Often the reason lies in trivial things: a loose plug, broken plugs in the panel, or a power surge. However, if external factors are excluded, the problem may lie deeper - in starting relay, the thermostat or compressoritself. Understanding the design of your unit will help save time and money.
In this article we will look in detail at why a two-chamber model may stop starting, and how to distinguish a malfunction that can be fixed independently from a complex technical defect. Critical: if you hear a click, but the motor does not start, immediately disconnect the device from the mains to avoid a fire. Further operation in this mode is dangerous.
Checking the electrical circuit and external power
The most obvious, but often ignored reason is the lack of electricity. Do not rush to look for a breakdown inside the case until you are sure that the power supply is stable. In older homes, the wiring may not be able to handle the load, especially if energy-intensive appliances are running at the same time.
Test the outlet by connecting another appliance, such as a lamp or hair dryer, to it. If the outlet is working, inspect the power cord Biryusa refrigerator for creases, melts, or signs of rodents. Often the wire bends at the very base of the plug, which leads to a break in the circuit.
Pay attention to the indicators. If the light on the front panel is on, but the compressor is silent, it means that current is entering the system, but the start command does not pass or the actuator is faulty. In modern models with electronic control, the absence of an indication may indicate a failure control module.
If you are using an extension cord, try plugging the equipment directly into the wall. Cheap surge protectors often have poor contact or are not designed for the starting currents of a powerful motor. It is also worth checking circuit breaker in the apartment panel - perhaps there was a power surge and the circuit breaker was knocked out.
Faults in the start-up relay and compressor
If there is electricity, but the motor hums for a few seconds and turns off or makes a click, but is silent, the problem is most likely in the starting mechanism. Start relay is a small block that supplies an impulse to start the motor windings. Over time, the contacts inside it burn out, and it ceases to perform its function.
The compressor is the “heart” of the refrigerator. If it burns out, you will hear a characteristic burning smell or see that the windings have turned black. In two-chamber models Biryusa single-phase motors that are sensitive to voltage changes are often used. With frequent surges in the network, the life of the relay and motor is significantly reduced.
- ⚡ A click when turned on and silence is a sign of a faulty start relay or jamming of the piston group.
- 🔥 Humming for 5-10 seconds followed by shutdown - try starting at low voltage or interturn short circuit.
- 🔌 Heating of the compressor housing without starting is a sign of thermal protection, which is triggered due to overload.
How to check the relay yourself?
To check the relay, you need to remove it from the compressor and shake it. If a ringing sound is heard inside (as if from loose parts), it means that the mechanism is damaged and requires replacement. You can also ring the contacts with a tester.
Replacing a relay is an inexpensive procedure and accessible even for a beginner, if you have minimal skills in working with tools. However, if the problem is in compressorthe system itself, you will need professional sealing and refilling of the system with freon, which cannot be done at home.
Problems with the thermostat and temperature sensors
In mechanical models Biryusa responsible for turning the motor on and off thermostat. This device measures the temperature in the chamber and closes a circuit when it gets too warm. If the thermostat is faulty (the contacts are stuck or the freon in the bellows has evaporated), the circuit will not close and the compressor will not receive a signal to operate.
In models with the No Frost system and electronic control instead of a mechanical thermostat are used temperature sensors (thermistors). They transmit data to the control board. If the sensor “lies” or shows a break, the electronic brain of the refrigerator can block the start of the compressor, believing that the temperature is normal or, conversely, critically high.
| Control type | Control element | Symptom breakdown | Check method |
|---|---|---|---|
| Mechanical | Thermoregulator | The refrigerator does not turn on at all | Short the wires bypassing the thermostat |
| Electronic | Sensor (thermistor) | Error on display, no cold | Measuring resistance with a multimeter |
| Electronic | Control board | No response to buttons, program failure | Visual inspection of the board, continuity |
To check the mechanical thermostat, you can carefully short-circuit the two wires that go to it (after disconnecting the refrigerator from the network!). If the motor starts running after being plugged in, the thermostat is at fault. In electronic systems, you will need a multimeter to measure the resistance of the sensor at different temperatures.
Failures in the electronic control module
Modern two-chamber refrigerators Biryusa equipped with complex electronics. Control module coordinates the operation of the compressor, fans, defrost heating elements and display. A power surge in the network can damage the fuse on the board or “burn out” the control chip.
Symptoms of a module malfunction are varied: the refrigerator may turn on and off immediately, blink indicators chaotically, or not respond to commands at all. Sometimes resetting errors by disconnecting from the network for a long time (for 15-20 minutes) helps, but if a board element has burned out, repairs will be required at the service center.
⚠️ Attention: Attempts to independently repair an electronic board without the appropriate qualifications and equipment can lead to the final failure of the module. If you see traces of burning or swollen capacitors, it is better to replace the entire board.
It is also worth checking the integrity of the wiring harness. In two-chamber models, wires often run through the door hinge or near moving parts. A frayed wire can short to the housing or break, disrupting the logic of the controller.
The influence of the defrosting system on motor starting
In refrigerators with the No Frost system, the start of the compressor is closely related to defrosting cycles. If Defrost heating element or defrost timer (or the defrost sensor) are faulty, the system may become stuck in defrost mode. In this state, the voltage supply to the compressor is blocked by software to give the evaporator time to defrost.
If you see that the fur coat is frozen in the freezer compartment, but the refrigerator compartment is warm, and the motor is silent, the problem is probably in the defrost circuit. The motor will not turn on until the sensor detects the required temperature or the emergency cycle time has expired.
- ❄️ Ice on the evaporator behind the fan is a sign that defrosting has not been completed.
- 🕰️ The timer is stuck in the "defrost" position - the timer needs to be replaced or checked chains.
- 💧 Water under the refrigerator may indicate a clogged drainage, which indirectly affects the operation of the sensors.
☑️ Diagnostics of the No Frost system
Sometimes manual defrosting of the refrigerator during the day helps. If after this it works, but a week later the situation repeats, look for a malfunction in the elements of the defrost system. Ignoring this problem will lead to the evaporator becoming completely covered with ice and the fan jamming.
Mechanical damage and other reasons
Do not discount mechanical factors. If the refrigerator has recently been transported, it will take time to adapt. After transportation in a supine position Biryusa refrigerator it must stand upright for at least 4-8 hours (or better yet, a day) so that the oil flows into the compressor crankcase. Starting ahead of time can lead to water hammer.
A refrigerant leak may also be the reason for the lack of starting. Although the lack of freon itself rarely blocks the motor from starting (it will simply run without stopping), in models with inverter control or complex electronics, the pressure sensor can block the start at a critically low gas level.
⚠️ Attention: If you smell chemicals or see oily spots near the tubes, do not turn on the refrigerator. A freon leak in combination with a spark can be dangerous, and operation without gas will lead to overheating and combustion of the compressor.
Check the tightness of the doors. If the seal wears out and the door does not close tightly, the temperature inside rises and the motor must work harder. But if the door is skewed and the door open sensor (in some models) blocks the switch on, there will be no cold. Adjusting the hinges can solve the problem.
Frequently asked questions (FAQ)
Why does the Biryusa refrigerator hum but does not start?
Most likely, the start relay is faulty or the compressor is jammed. The engine tries to start, hums, but the starting torque is insufficient. It is necessary to change the relay or check the motor windings.
How long should the refrigerator sit after transportation?
Minimum 4 hours in the summer and up to 8-10 hours in the winter if it was transported horizontally. This is necessary for the oil to drain into the compressor.
Is it possible to replace the thermostat with an analogue from another manufacturer?
Yes, it is possible if the parameters match: the length of the capillary tube, the temperature range of operation and the mounting dimensions. It is important to install the tube correctly.
What to do if the refrigerator does not turn on after defrosting?
Let it stand turned off for a few more hours. Perhaps there is condensation left in the control system or the protection has tripped. If it doesn’t turn on after a day, check the relay and wiring.
Why does the light bulb not turn on, but the refrigerator works?
The lamp itself has burned out or the contacts in the socket have oxidized. This does not affect the operation of the compressor, just replace the light bulb with a working one.