Equipment owners are often faced with a situation when Indesit refrigerator begins to make unusually loud sounds, disturbing the silence in the apartment. Instead of the usual smooth hum, an obsessive noise, rattling or whistling appears, which can be annoying and indicate a malfunction. Understanding the nature of sound is the first step to solving the problem, since the nature of the acoustic signal often suggests which particular unit requires attention.
Modern models, such as Indesit DS 320 or older versions, can make noise for various reasons: from a banal overload of food to a serious compressor breakdown. It is important not to ignore changes in the operation of the unit, because timely diagnosis helps to avoid costly repairs in the future. In this article we will analyze in detail the mechanics of noise and how to eliminate it.
Natural operating noise or malfunction?
Before you panic, you need to determine whether the sound is a sign of a breakdown or normal operation of the system. Normal hum usually constant and does not change depending on the time of day, while emergency noise is often accompanied by a change in temperature in cells or periodic knocking. New Indesit models are quieter than their old counterparts, but they also make sounds when the refrigerant circulates.
You should listen especially carefully to the sounds immediately after installing the equipment in a new place. If refrigerator it was just brought from the store, it needs time to adapt and spread the oil in the compressor. During the first hours of operation, the noise level may be higher than usual, but it should stabilize within 24 hours.
⚠️ Attention: If the hum is accompanied by a sharp metallic clang when starting the engine or burning smells, immediately unplug the appliance. Operation in this mode can lead to fire or complete failure of the compressor.
There are several types of sounds that are considered acceptable. These include the quiet gurgling of freon, the slight cracking of plastic when the temperature changes, and the smooth hum of a running engine. However, if vibration is transmitted to the furniture body or the sound becomes intermittent, this is a signal that a check is needed.
Installation problems and external factors
Often the cause of excessive noise lies not in the internal components, but in the incorrect location of the unit. If the Indesit refrigerator stands unevenly, vibration from the compressor is transmitted to the floor and walls, creating a resonating hum. Checking the horizontal installation is the first thing you need to do before calling a technician.
Contact of the case with furniture or walls also enhances sound effects. Even the slightest touch to the back of a cabinet or side panel can turn a quiet motor into a loud rattling sound. It is necessary to provide a gap of at least 5-7 centimeters on all sides for free air circulation and absence of resonance.
☑️ Installation diagnostics
Adjusting the support legs allows you to compensate for uneven floors. To do this, just tighten the front screws so that the body tilts slightly back - this will ensure a tight fit of the doors and reduce the overall vibration of the structure. If the floor is slippery, you can place special anti-vibration pads under the legs.
Faults of the compressor and start relay
The heart of any refrigerator is the compressor, and it is this that most often becomes the source of problems. If motor-compressor it is worn out or is overloaded, it begins to hum much louder than usual. In models Indesit with two compressors, noise can come from one of them, which simplifies the localization of the fault.
A frequent cause of a loud hum is the failure of the starting relay. This small element is responsible for starting the engine, and if it breaks down, the compressor may hum but not start, or make clicking noises before starting. Replacing a relay is a simple procedure that can often be done independently without special tools.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Loud hum, then silence | Starting relay malfunction | Low |
| Constant metal clanging | Destruction of the compressor suspension | Medium |
| Strong vibration housing | Wear of motor shock absorbers | Average |
| Buzzing intermittently | Problems with the thermostat | Low |
If the compressor is fixed on shock absorbers, their wear leads to the transfer of vibration to the metal casing and body of the refrigerator. In this case vibration it is felt with your hands when touching the side walls. Replacing rubber washers or springs helps restore silence, but requires partial disassembly of the rear panel.
⚠️ Attention: Do not attempt to open the sealed compressor circuit yourself or change the refrigerant without a license and equipment. This is life-threatening and requires professional disposal of gases.
Noise of the No Frost system and fan
In refrigerators with the system No Frost the fan is often the source of noise. The blades can become icy, warped, or simply wear out over time, creating a characteristic hum or crackling noise. In models Indesit EF or DF series, the fan is located in the freezer compartment behind a plastic panel.
Ice freezing on the blades occurs due to a broken door seal or frequent opening of the chamber. Ice prevents free rotation, and the fan motor begins to hum, trying to overcome the resistance. In such cases, complete defrosting of the refrigerator is required within 10-12 hours.
How to replace the fan?
To replace it, you need to remove the back panel in the freezer, disconnect the power terminals of the old fan and install a new one. It is important to choose a model with similar fitting dimensions and voltage.
If the noise remains after defrosting, then the problem is mechanical wear of the fan motor bearing. In this case electric motor requires replacement. Ignoring this problem can lead to overheating of the motor and melting of the plastic elements of the cooling system.
Foreign objects and rattling
Sometimes the source of noise turns out to be tritely simple - bottles or cans standing next to the refrigerator or on its roof are rattling. Vibration from a working unit is transmitted to nearby objects, causing them to rattle. Check the space around and inside the refrigerator.
Inside the chambers, shelves can rattle if they are not tightly inserted into the grooves, or dishes touching each other. It is also worth inspecting the back of the refrigerator: there may be a copper tube rattling there if it touches the body or other elements. Carefully removing the tube with your hand (with the device turned off) can solve the problem.
Fixings of shelves and drawers can also be a source of sound. The plastic dries out over time and begins to knock when vibrating. Placing small pieces of foam rubber or soft fabric at the contact points helps eliminate rattling without replacing parts.
When you need to call a technician
Exist situations where independent repair is impossible or dangerous. If you have checked all external factors, made sure that the fan and relay are working properly, but Indesit refrigerator continues to hum, the problem may lie in the compressor itself or a freon leak. Diagnosis of such faults requires pressure gauges and testers.
An alarming signal is a situation when the motor hums, but the cold does not accumulate. This indicates that the compressor is running dry or there is a refrigerant leak. In this case, a professional charging the system search for the location of the leak is necessary, which cannot be done at home.
Also, a master is needed if the compressor itself needs to be replaced. This is a complex process that involves soldering copper pipes, evacuating the system, and charging with refrigerant. Trying to do this yourself without experience will lead to damage to an expensive unit.
Is it possible to completely eliminate the noise of an old refrigerator?
It is impossible to completely eliminate the sound of a running motor, since this is a physical process of gas compression. However, you can reduce the noise level to a comfortable minimum by replacing worn shock absorbers, relays and checking the installation. In some cases, soundproofing the engine compartment with special materials helps.
Why does the refrigerator hum only at night?
During the day, extraneous noise is masked by background sound, and at night, in silence, even the standard hum of the compressor seems louder. Also, at night, the voltage in the network often drops, which can cause humming of transformers or unstable operation of the motor.
Is it dangerous if the refrigerator hums, but freezes?
If the temperature in the chambers is maintained normally, then most likely there is no danger. This may be a feature of the operation of a particular model or a sign of beginning wear of the bearings. It is worth observing the dynamics: if the noise increases, plan diagnostics.
How often do you need to defrost a No Frost refrigerator?
The No Frost system does not require regular defrosting to remove ice, but a preventive power outage once a year is useful for cleaning dust and checking the defrosting system. This helps prevent the formation of ice plugs that cause fan noise.
Can a new refrigerator hum?
Yes, a new refrigerator can hum during the break-in period (the first 2-3 days). Also, the operating volume depends on the model: budget Indesit series can be noisier than premium analogues due to less perfect insulation and compressor design.