The situation when your Samsung begins to make unusual sounds can take you by surprise, especially if the equipment has been working for several years. Humming, humming or low-frequency noise are often the first warning signs of more serious problems, although in some cases this may be normal for certain models. Owners often confuse the design features of the compressor with signs of failure, which leads to unnecessary panic or, conversely, to ignoring the real problem.
Modern refrigerators of the South Korean brand are equipped with complex air circulation systems that behave differently than older units. Understanding the physics of the cooling process and the design of the unit inverter compressors, which behave differently than older units. Understanding the physics of the cooling process and the design of the unit No Frost will help you independently determine the source of the sound. In this article, we will look in detail at why a Samsung refrigerator is humming, how to distinguish operating noise from an alarm signal, and what steps need to be taken for silence in the kitchen.
It is critical not to confuse the periodic hum of a running compressor with a continuous hum, which may indicate an overload of the engine or problems with the electrical network. Ignoring the first symptoms can lead to expensive repairs or a complete replacement of the unit, so diagnostics must be carried out promptly and competently.
Natural causes of noise: when not to sound the alarm
Before grabbing tools, it is necessary to exclude natural causes of sounds. A new refrigerator or a unit that has just been defrosted may be louder than usual. This is due to the fact that the system requires time to set the temperature and stabilize the pressure coolant in the circuit. In the first 24–48 hours of operation, intensive engine operation is quite acceptable.
It is also worth considering the installation features. If the body of the equipment touches walls, furniture or objects on the countertop, vibration from the compressor will be transmitted to them, causing resonance and increasing the hum. In such cases, it seems that the refrigerator itself is humming, although in fact the surrounding objects are vibrating. Check the gaps: the distance to the side walls should be at least 5 cm, and to the rear wall - at least 10 cm.
- 🔊 Thermal expansion: Characteristic crackling or clicking noises may come from plastic parts of the internal housing that contract or expand with temperature changes.
- 💨 Air circulation: In models with system No Frost the fan can create a uniform noise of air flow, which is normal.
- ❄️ Movement freon: Gurgling or overflowing of liquid inside the tubes indicates normal circulation of refrigerant through the system.
⚠️ Attention: If the hum appeared immediately after installing the new refrigerator, let it stand turned off for 2-4 hours (if it was transported lying down) before turning it on, so that the oil in the compressor flows into the crankcase.
Problems with installation and vibration of the case
One One of the most common reasons why a Samsung refrigerator is humming is improper installation. Vibration from the motor is transmitted to the floor and walls if the unit is unstable. Even minimal distortion can cause internal components to rattle and increase the overall background noise. Check the horizontal installation using a building level.
Adjusting the legs is a simple but effective procedure. Most models Samsung equipped with adjustable front supports. By rotating them clockwise or counterclockwise, you can achieve the ideal position. Make sure that all four legs fit tightly to the floor, but the main emphasis is on the front pair for proper closing of the doors.
If the floor is uneven or slippery, place special anti-vibration pads or pieces of thick rubber under the legs. This will help dampen vibrations and reduce noise levels. Also check whether the pipes at the back of the refrigerator are touching each other - when they vibrate, they can make a metallic ringing.
☑️ Installation diagnostics
Faults in the compressor and start relay
If, after checking the installation, the refrigerator continues to hum, and the sound comes directly from the motor, the problem may lie in the very heart of the unit. A compressor is a pump that pushes freon through the system. Over time, the motor shaft bearings wear out, resulting in a whining or loud hum. In older models, this is often accompanied by overheating of the motor housing.
Another common reason is failure of the starting relay. This small element is responsible for starting the engine. If the relay contacts are burnt or the mechanism is jammed, the compressor may hum but not start, or it may start with a loud click and hum. In such cases, a characteristic hum, interrupted by clicks, can be heard on the rear wall in the lower part.
For diagnostics, you must carefully remove the back cover (after disconnecting the refrigerator from the network!) and inspect the relay. If you hear a burning smell or see traces of melting, the part requires replacement. Replacing the relay yourself is possible if you have electrical skills, but it is better to entrust this to professionals.
Symptoms of a compressor malfunction
If the compressor hums, but does not start, and after a few minutes it clicks and turns off, this is a sign of a “wedge” of the motor or a malfunction of the starting winding. Attempting to turn it on can completely burn the winding.
Fan noise in the No Frost system
In refrigerators Samsung with the system No Frost fans are responsible for circulating cold air. There may be two of them: one in the freezer, the other in the refrigerator compartment (in some models). If the fan blades are contaminated with dust or frozen with pieces of ice, an imbalance and a strong hum occurs.
Often users hear a noise similar to the operation of a computer cooler, which either increases or decreases. This is the fan running. If a foreign object (such as a bottle label or bag) gets into the chamber, it may touch the blades, causing a cracking or buzzing sound. Dried grease in the fan bearing can also make noise.
To fix the problem, defrosting is often required. If ice freezes on the evaporator or blades, the fan begins to operate under load. Complete defrosting for 24 hours with the doors open will help melt the ice and restore normal operation of the unit.
Foreign objects and rattling of parts
Sometimes the source of noise turns out to be trivially simple. Bottles, jars, or containers may rattle inside the refrigerator or freezer if they are close to each other or touching the sides. Vibration from a running compressor is transmitted to the shelves, causing them to “sing.”
It is also worth checking the rear technical panel. Sometimes the screws that secure the compressor or the protective casing become loose. The metal tubes leading to the motor may also vibrate. Carefully, trying not to damage the tubes (they are very thin!), check the gaps between the tubes and the body.
If your Samsung refrigerator is humming, pay attention to the drawers and shelves. The plastic may rub against the guides. Lubricating the guides with food-grade silicone or rearranging the products often solves the problem.
- 🍾 Products: Glass on glass or glass on plastic creates a high-pitched ringing sound when vibrating.
- 🔩 Fasteners: Loose bolts on the compressor cause a metallic clanging sound.
- 🧊 Ice: Pieces of ice caught in the drainage chute may rattle when the fan is operating.
Diagnostics by sound type and fault table
To accurately determine the cause, you need to carefully listen to the nature of the sound. Different faults produce different acoustic signals. Below is a table that will help classify the problem.
| Sound type | Probable cause | Difficulty of repair |
|---|---|---|
| Low hum turning into a howl | Bearing wear compressor | High (motor replacement) |
| Loud crackling and buzzing at start | Starting relay malfunction | Medium (relay replacement) |
| Uniform air noise | Normal operation No Frost | Not required |
| Metallic ringing or rattling | Touching pipes or objects | Low (correct installation) |
| Intermittent fan noise | Ice on blades or bushing wear | Medium (clean or replace) |
If you determine that the problem is serious, do not delay contacting service. The operation of a faulty compressor can lead to freon leakage and burnout of the windings, which will significantly increase the cost of repairs.
⚠️ Attention: Never try to solder the pipes or change the compressor yourself if you do not have a license and equipment for working with refrigerants. This is life-threatening and requires evacuation of the system.
Prevention and care of the Samsung refrigerator
For your refrigerator Samsung to serve long and quietly, it is necessary regularly carry out preventive measures. Timely defrosting (even for the No Frost system is recommended once a year) will prevent the formation of ice jams that load the fan and compressor.
Regularly wipe the door seals. If they do not fit tightly, the compressor will work continuously, trying to maintain the temperature, which will lead to overheating and increased noise. Check the cleanliness of the condenser (grid at the back) - dust impairs heat transfer.
Make sure the chambers are filled. An empty refrigerator is louder due to the lack of sound-absorbing products, while a full one disrupts air circulation. The optimal load is about 70% of the volume.
How to extend the life of the compressor?
Do not put hot foods in the refrigerator. A sharp jump in temperature forces the motor to operate at maximum power, which accelerates the wear of mechanical parts.
Frequently asked questions (FAQ)
Why does the new Samsung refrigerator hum loudly?
The new unit may operate louder due to adaptation of components, shipping lubricant, or improper installation. Let it run idle for a day. If the noise does not subside, check the installation level and clearances.
Is it possible to eliminate the hum of the compressor yourself?
If the hum is caused by vibration of the housing or pipes, yes. If the internal bearings of the motor are worn out, a professional replacement of the compressor is required, since repairing the motor itself is not economically feasible.
How often do you need to defrost a No Frost refrigerator?
The No Frost system does not require frequent defrosting, but once every 6-12 months it is recommended to completely turn off the refrigerator for 24 hours to remove hidden ice and disinfection.
Is it dangerous if the refrigerator hums but is cold?
If the temperature inside remains the same and the hum is not accompanied by clicks or stops of the motor, this may be normal. However, an increase in noise over time indicates a progressive malfunction.