Owners of modern household appliances Technicians often encounter a situation where a Samsung refrigerator makes unusual sounds that cause alarm. Clicks can appear at any time: immediately after turning on, during operation, or when the motor stops. Understanding the nature of these sounds is the first step to food preservation and peace of mind in the home.
Not every knock is a sign of a problem. The design of modern units involves the presence of many mechanical components that inevitably make sounds when materials expand or electrical circuits switch. However, it is important to clearly distinguish between the normal operation of the equipment and signals of a serious breakdown that requires the intervention of a technician.
In this article we will analyze in detail the physical and technical reasons for the occurrence of clicks, methods of self-diagnosis, and situations where you cannot do without calling a specialist. Correct interpretation of sound information will help avoid unnecessary expenses for repairs.
Physical reasons: thermal expansion of materials
The most common cause of strange sounds, especially in new models, is banal physics. The plastic from which the inner housing is made and the metal of the evaporator have different coefficients of thermal expansion. When suddenly cooled or heated, the materials contract and expand at different rates, creating a characteristic cracking or clicking sound.
This process is absolutely normal for refrigerators with the system No Frost. In such units, temperature changes occur cyclically and quite sharply, which provokes sounds reminiscent of shots or blows. Most often this happens after the evaporator has defrosted or at the time of active cold build-up.
The intensity of the sounds may depend on the quality of the plastic and the assembly of a particular batch. Over time, when the internal elements “grind in”, the clicks may become quieter, but, as a rule, they do not disappear completely. This is a design feature, not a defect.
⚠️ Attention: If the clicks are accompanied by strong vibration of the case or rattling of the shelves, check the stability of the installation. Sometimes thermal expansion simply displaces a loose part, increasing the noise.
To reduce noise from thermal expansion, you can try adjusting the position of the refrigerator. Evenly distributing the load on the legs will help the body deform less noticeably.
Operation of the starting relay and electrical circuit
If sounds come from the lower rear part of the unit where the motor is located, most likely the problem is electrical. The start relay is a small mechanism that supplies voltage to the motor windings to start it. When the compressor is turned on and off, the contacts inside the relay open and close, which is accompanied by a loud click.
A single click every 20-40 minutes is the normal operating mode. However, if you hear a series of rapid clicks, after which the engine does not start or immediately stalls, this is an alarming symptom. There may be a malfunction of the relay itself, the motor windings, or problems with the network voltage.
In Samsung models with inverter compressors, the starting system is smooth, and there should be no loud clicks. If your refrigerator is equipped with technology Digital Inverter, but makes loud sounds when starting, this may indicate a failure in the electronic control unit.
- 🔊 A loud metallic click is a sign of mechanical opening of the contacts in the old relay.
- ⚡ Quiet electrical crackling - may indicate an insulation breakdown or poor contact in the wiring.
- 🔄 A series of clicks without starting the motor - protection against overload or malfunction of the starting device.
For diagnostics, you can carefully (be sure to disconnect the device from the network!) remove the back cover and inspect the relay for melting or blackening. A burning smell is a sure sign that the part requires replacement.
How to check the relay yourself?
Remove the relay from the compressor and shake it. If a ringing sound is heard inside (as if from broken glass), it means that the starting capsule is destroyed and the relay needs to be changed.
Specifics of the No Frost system
Samsung refrigerators with the system No Frost have a complex mechanism for air circulation and automatic defrosting. This process involves fans, dampers and heating elements. Clicks at the top of the chamber or behind the back wall are often associated with their operation.
The air flow regulator flap (Damper) periodically opens and closes, regulating the flow of cold air from the freezer to the refrigerator compartment. The damper drive mechanism makes an audible click or series of sounds. This is a programmed cycle that does not require intervention.
A fan can also be a source of sound. If ice has frozen on the blades or a foreign object has gotten into the mechanism, the fan may make rhythmic tapping noises. In defrost mode, the ice melts and can drip onto the heater, causing a hissing sound that is sometimes perceived as a crackling sound.
It is important to distinguish operating sounds from signs of freezing. If clicks become more frequent and ice appears on the food, the water drainage system may be clogged or the heating element of the evaporator has failed.
Comparison of normal noise and signs of breakdown
In order not to panic ahead of time, it is necessary to systematize the sounds. Not all deviations from silence are critical. Below is a table to help classify sounds and determine the need for repair.
| Sound type | Probable cause | Is repair needed? | Urgency |
|---|---|---|---|
| Single click on start/stop | Relay operation | No (Normal) | Not required |
| Crackling sound reminiscent of blows | Thermal expansion of plastic | No (Normal) | Not required |
| Series of clicks, the motor does not start | Relay or compressor malfunction | Yes | High |
| Rhythmic tapping | The fan touches the ice | Desirable | Medium |
| Loud knocking inside the compressor | Wear piston group | Yes (replacement) | High |
Pay attention to the frequency of the sounds. If the refrigerator starts clicking every 2-3 minutes instead of the usual 30-40, this indicates that it is not reaching the desired temperature and is operating in emergency mode.
It is also worth listening to the nature of the sound. A metallic clanging sound inside the motor is a bad sign, indicating mechanical destruction of the compressor components. In this case, it is better to turn off the unit before the technician arrives.
⚠️ Attention: If after the click the refrigerator stops freezing and the light inside is on, do not try to restart it repeatedly. This can permanently damage the compressor.
Problems with the inverter compressor
Many modern Samsung models are equipped with inverter compressors. Their operating principle differs from classic linear motors: they do not turn off completely, but change power. Therefore, classic relay clicks are not typical for them in normal mode.
If the inverter refrigerator starts making clicks, this may indicate a malfunction of the control board or the compressor itself. Electronics may try to start the motor, encounter resistance and go into protection, which is accompanied by sound signals.
Often the problem lies in power surges. Inverters are sensitive to the quality of the power grid. Unstable voltage can cause malfunctions in the control electronics, which manifests itself in the form of strange sounds.
☑️ Diagnostics of an inverter refrigerator
Accurate diagnostics of inverter systems often require special equipment that reads error codes. You can only check basic parameters, such as temperature and voltage, on your own.
External factors and operating conditions
Sometimes the reason for clicks lies not in the refrigerator itself, but in its operating conditions. Incorrect installation is one of the most common causes of extraneous noise, which enhances the internal sounds of the unit.
If the refrigerator is close to a wall or furniture, vibration from the compressor is transmitted to the body and causes resonance. The tubes at the back may vibrate and hit each other or the cabinet wall, creating a clicking sound.
It is also worth checking the contents of the chambers. Glass shelves, bottles or dishes that come into contact with vibration can make loud sounds. Plastic containers stuck to the wall make a loud cracking sound when thermal expansion occurs.
- 📏 Check the gap between the back of the refrigerator and the wall (minimum 5-7 cm).
- 🧊 Make sure that the food does not touch the back wall of the chamber.
- 🧴 It is better to place glass bottles on a stable surface so that they do not ring.
Eliminating external factors often solves the problem of a “noisy” refrigerator without the need to call a technician. A simple rearrangement of food or adjusting the legs can work wonders.
When you need to call a specialist
There are a number of symptoms in which self-repair is not only useless, but also dangerous. If you notice that clicks are accompanied by heating of the housing in the area of the motor, the appearance of a burning smell, or a complete absence of cold, call a specialist.
Intervention in the refrigerant system or replacement of the compressor should only be carried out by a licensed professional. Incorrect soldering or refilling can lead to freon leakage and final breakdown of an expensive unit.
Help is also needed if the refrigerator is under warranty. Opening seals or repairs on your own will void the manufacturer's warranty.
⚠️ Attention: Do not attempt to repair live electrical parts. Capacitors in the circuit can retain a charge even after being disconnected from the network.
The technician will conduct professional diagnostics, check the pressure in the system, the integrity of the windings and the operation of the electronics. This will save you time and money in the long run.
Is it normal for the refrigerator to click immediately after being plugged in?
Yes, this is normal. At the moment of connection, an initial test of the systems takes place, the start relay is activated, and the compressor makes its first attempt to start. This is accompanied by a characteristic click.
Why does an old refrigerator click louder than a new one?
Over time, the start relay wears out, the fastenings of the compressor and plastic elements become loose. Mechanical wear leads to increased gaps and, as a result, louder sounds during operation.
Can a defrosted refrigerator click?
Yes, if you have just defrosted the refrigerator and turned it on, the thermal expansion of materials will occur more intensely due to the large temperature difference. The clicking noise may be frequent during the first hours of operation.
Does the voltage level in the network affect the clicking noise?
Yes, low or unstable voltage can cause the start relay to trip (repeatedly) in an attempt to start the compressor. This causes a series of clicks and can be dangerous for the motor.
What to do if clicks appear after moving?
If the refrigerator was transported lying down, oil could leak into the circuit. You can turn it on only after standing in a vertical position (at least 4-8 hours). Clicking sounds can be associated with water hammer in the compressor if you hurry.