The situation when Indesit refrigerator begins to make loud, unusual sounds always causes anxiety for the owner. The hum can be monotonous and low, reminiscent of the operation of a transformer, or it can turn into a metallic clang and whistle. In contrast to the quiet rumbling of the refrigerant that circulates through the tubes, obsessive vibration often indicates mechanical problems or violation of operating conditions.
Italian brand Indesit famous for its reliability, but even high-quality equipment wears out over time. Noise can arise either due to a banal misalignment of the housing, or due to the failure of an expensive compressor. Understanding the nature of sound is the first step to solving the problem, which will allow you to save on calling a technician or correctly formulate the problem when calling for service.
Before disassembling the unit, it is necessary to carry out an initial diagnosis by ear. Extraneous noise It is often localized in a specific area: below, behind or inside the chamber. If you notice that the hum increases when the engine starts or, conversely, subsides after the temperature rises, these are important clues for troubleshooting. In this article, we will analyze in detail all possible causes and methods for eliminating them.
Violation of installation rules and misalignment of the case
The most common reason why Indesit refrigerator buzzes more than usual lies not in a breakdown, but in improper installation. If the unit is not level, vibration from the operating compressor is transmitted to the housing and resonates, creating a powerful hum. Even a minimal tilt can cause an imbalance in the motor rotor, which will lead to accelerated wear of the bearings.
Check the horizontal installation using a building level. If you don’t have it at hand, you can use a regular glass of water: the surface of the liquid should be parallel to the top edge of the container. Adjustment is carried out using the front support legs, which can be twisted or unscrewed to change the height of the angle.
⚠️ Attention: Never leave the refrigerator in an unstable position. Constant vibration due to misalignment can lead to breakage of cooling system tubes and freon leakage, which will require complex and expensive repairs.
It is also worth checking the distance to walls and furniture. The rear condenser grille requires free space for heat exchange. If the refrigerator is moved close to the wall, the vibration is transmitted to the building structures, and the whole room begins to hum. The optimal distance to the back wall should be at least 5-7 centimeters.
Problems with the compressor and start relay
The heart of any refrigeration unit is compressor. Models Indesit often use piston engines, which by their nature emit a certain operating noise. However, if the hum becomes loud, growling or accompanied by a metallic knock, this indicates a malfunction.
One of the common causes is wear of the internal valves or engine shaft bearings. In this case, the compressor works "pull", consuming more electricity and creating excess pressure. It is also worth paying attention to the starting relay - if it is faulty, the motor may hum but not start, or start with a loud click and vibration.
The compressor can be diagnosed by gently touching its housing with your hand (be careful, it may be hot). If the vibration is transmitted unevenly throughout the refrigerator body, or you feel strong jerking, the unit probably needs to be replaced. In some cases, replacing the shock-absorbing gaskets under the engine helps.
Is it possible to change the compressor yourself?
Replacing a compressor is a complex process that requires a vacuum pump, a pressure gauge station, and skills in soldering copper pipes. Without special equipment, it will not be possible to fill the system with freon and seal the tubes hermetically. Self-replacement is only possible if you have access to professional tools.
Wear of rubber bushings and shock absorbers
The compressor is not attached to the refrigerator frame rigidly, but through special rubber bushings or shock absorbers. Their task is to dampen vibration that occurs during operation of the piston group. Over time, the rubber dries out, cracks or completely breaks down. As a result, the metal body of the motor begins to touch the frame, causing strong rattling and humming.
To check the condition of the bushings, you need to gain access to the rear of the unit. Visually inspect the rubber elements: they should not have deep cracks or tears. If, when you slightly rock the compressor, you hear metal knocking on metal, it means the shock absorption is broken.
Replacing bushings is one of the simplest and most accessible procedures. do-it-yourself repair. New parts are inexpensive and are sold in appliance parts stores. Sometimes, as a temporary measure, you can use pieces of dense rubber or cork, but it is better to install original or high-quality analogues.
Fan malfunction in the No Frost system
If your Indesit equipped with a No Frost or Frost Free system, the noise source may be fan circulating cold air. The fan blades may become coated with ice, touch the walls of the box, or simply wear out over time. The characteristic sound in this case is a whistle, crackling or periodic hum that appears and disappears.
Often the problem arises due to ice freezing on the evaporator, which interferes with the free rotation of the impeller. Ice can break off and get under the blades, causing whipping. It is also possible that the bearing of the fan itself fails, which leads to a monotonous howling sound.
To eliminate the problem, you will need to defrost the refrigerator for 24 hours. If the noise disappears after complete thawing and removal of ice, then the problem was freezing. If the fan continues to hum or crackle when dry, it must be replaced with a new one.
☑️ Fan diagnostics
Table: Types of sounds and probable causes
For a more accurate determination of the malfunction, use the table corresponding to sounds and causes. This will help you quickly figure out the nature of the problem.
| Sound type | Probable cause | Urgency of repair |
|---|---|---|
| Monotonous low hum | Improper installation, wear compressor | Medium |
| Metal clanging/knock | Touching of tubes, destruction of bushings | High |
| Whistling or crackling | Fan No Frost, ice in the system | Medium |
| Humming without starting | Faulty start relay, compressor wedge | High |
| Gurgling and splashing | Normal circulation of freon (not dangerous) | Not required |
Resonance of tubes and internal elements
Sometimes Indesit refrigerator hums due to the fact that the copper tubes of the cooling system or other internal elements are in contact with each other or with the walls of the case. The vibration transmitted from the compressor causes them to vibrate in resonance, creating an unpleasant ringing or humming.
You can determine this by gently pressing the tubes with your hand from behind (in the area of the compressor) or inside the chamber (if there is access). If, when pressed, the sound disappears or the tone changes, then you have found the source. The tubes may have become dislodged during transportation or vibration during long periods of operation.
⚠️ Attention: Be extremely careful when straightening copper tubes! They are very thin and break easily. Any damage will lead to an immediate release of freon and will require calling a technician with refilling equipment.
To eliminate resonance, use soft materials, such as foam rubber or a special damper tape, to isolate the tubes from touch points. You can also carefully (with your fingers, without tools) bend the tube a few millimeters to remove the contact.
The influence of chamber loading on the noise level
Paradoxically, the noise level may depend on how densely the refrigerator is filled. Empty shelves and missing products can increase echoes inside chambers, making work sounds more noticeable. Products with high heat capacity (water, meat) act as additional vibration and noise absorbers.
If you just bought a refrigerator or have completely defrosted it, it may seem louder than usual. As the chambers are filled with products, the background sound often becomes quieter and smoother. Also check if the bottles or cans on the shelves are vibrating - they may resonate with the frequency of the motor.
When you need to call a specialist
Not all problems can be solved on your own. If, after checking the installation, the condition of the bushings and defrosting, the Indesit refrigerator continues to hum strongly, most likely the problem lies inside the hermetically sealed unit. Extraneous sounds may indicate wear of the piston group, valves or electric motor windings. refrigerator Indesit continues to buzz loudly, most likely the problem lies inside the hermetic sealing unit. Extraneous sounds may indicate wear on the piston group, valves or motor windings.
A particularly alarming signal is the combination of a loud hum with a lack of cold or overheating of the compressor (it becomes hot to the touch and is painful to touch). In this case, further operation may lead to complete combustion of the motor.
Also, the help of a specialist is necessary if you hear a burning smell or see sparking in the area of the start relay. Do not try to repair the electrical part without the appropriate knowledge and tools, it is life-threatening.
Why does the refrigerator hum only at night?
At night, the level of extraneous noise in the apartment decreases, and the operating sounds of the equipment become more noticeable. In addition, the power supply voltage may drop at night, causing the compressor to work harder and make more noise. Also, at night, the fast freezing mode turns on more often if it is activated.
Can the new Indesit refrigerator hum?
Yes, new models can work louder than older ones due to the use of more powerful compressors or design features. In addition, in the first weeks of work, grinding in of parts occurs. If the noise is not accompanied by vibration of the case and does not interfere with sleep, this may be normal.
How to reduce the noise of a refrigerator without repair?
Check whether objects on the shelves are touching each other. Make sure the refrigerator is level and not touching the walls. You can place anti-vibration pads made of thick rubber under the legs. Do not place the refrigerator in a niche without gaps for ventilation.
Is it dangerous to ignore a strong hum?
Ignoring the problem can lead to serious consequences: from increased energy consumption to complete failure of the compressor and defrosting of all products. In the worst case, a fire is possible due to overheating of the wiring or motor.