The situation when Indesit refrigerator begins to make unusually loud sounds is familiar to many owners of this equipment. The hum can be monotonous and low, reminiscent of the hum of a transformer, or it can turn into a sharp rattling and knocking. For household appliances operating 24 hours a day, a change in the acoustic profile is the first signal that the system is working under increased load or a malfunction has occurred in one of the components.
Understanding the nature of sounds allows you not only to save nerves, but also to prevent more serious breakdowns that may require expensive repairs. In some cases, hum is a normal reaction to external factors, but often it is a symptom of wear compressor or problems with the heat dissipation system. It is important to learn to distinguish between operating noise and alarm signals.
Further ignoring extraneous sounds can lead to failure of the compressor motor or a violation of the tightness of the circuit. In this article, we will analyze in detail the mechanical and electrical causes of noise, and also provide a step-by-step algorithm of actions for self-diagnosis of your unit.
Natural causes of noise and design features
Before sounding the alarm and looking for service center contacts, it is necessary to exclude factors not related to the breakdown. New models of refrigerators, especially those equipped with a system, by definition, cannot be absolutely silent. They constantly operate fans that circulate cold air through the chambers, which creates a background hum. Indesit, especially those equipped with a system No Frost, by definition, cannot be absolutely silent. They have fans constantly running to circulate cool air through the chambers, creating a background hum.
It is also worth considering the physical principle of the refrigerant. As freon passes through the capillary tube and expansion valve, a characteristic gurgling or hissing sound may occur. It is normal if the sound appears periodically, immediately after stopping or starting the engine. However, if the refrigerator is humming constantly and the sound increases over time, we are talking about something else.
Another factor is the thermal expansion of materials. The plastic of the inner chamber and metal elements may make clicking or cracking sounds when the temperature changes. This is not a defect, but only indicates physical processes inside the case.
⚠️ Attention: If the hum is accompanied by vibration of the case, which can be felt by placing your palm on the side wall, this is not the norm for a working device. Vibration indicates imbalance or problems with the fastening of components.
If the sound appears sharply and differs from the usual background, this is a reason for a deeper check.
Installation problems and vibration of the case
One of the most common reasons why Indesit refrigerator hums loudlyis incorrect installation. Vibration from a running compressor is transmitted to the housing and then to the floor, amplified by resonance. If the unit is not level, one of the corners takes on the main load, causing rattling.
Check the adjustment supports at the bottom of the device. They must be unscrewed so that the refrigerator is stable, but with a slight tilt back for the doors to close correctly. Insufficient clearance between the rear wall of the appliance and the wall can also provoke increased noise due to disruption of heat exchange and fan operation.
☑️ Diagnostics of refrigerator installation
Often users forget about the transport bolts or fasteners that may remain inside or outside after unpacking. Although there are fewer of them in refrigerators than in washing machines, the presence of any loose elements inside the compressor compartment will cause a strong knock.
If the floor in the room is wooden or has voids, the vibration will spread throughout the entire structure of the house. In such cases, it is recommended to place special anti-vibration pads made of thick rubber under the legs.
| Sound type | Probable cause | Elimination method |
|---|---|---|
| Monotonous hum with rattling | The case touches the furniture or wall | Move the refrigerator aside, provide a gap |
| Low-frequency rumble | Unstable position on the floor | Align the adjusting screws |
| Sharp metal clanging | Falling objects inside or outside | Check shelves and rear grille |
| Vibration throughout the body | Floor resonance or missing gaskets | Use anti-vibration stands |
Faults of the compressor and start relay
The heart of any refrigerator Indesit is the compressor. It is this that creates the pressure necessary for the circulation of the refrigerant. If you hear that the refrigerator makes a loud noise, but the cold does not gain or increases very slowly, the problem may lie in mechanical wear of the piston group or the electric motor windings.
Particular attention should be paid to the start relay. This small element is responsible for starting the engine. If it malfunctions, the compressor may try to start, make a loud beep or click, and then stall. After some time, the cycle repeats. This condition is dangerous due to overheating of the windings and can lead to motor combustion.
Wear of the compressor's internal shock absorbers is another common cause of noise. The motor is suspended inside a metal casing by springs. If one of them bursts or comes off, a strong metallic knock and vibration occurs during operation, transmitted to the entire housing.
⚠️ Attention: Independent replacement of the start relay or repair of the compressor requires skills in working with electricity and tools. Attempting to replace the relay without unplugging the appliance may result in electric shock.
In some cases, the hum is caused by the compressor operating under increased load due to loss of performance. This often happens with older models where the engine life is coming to an end.
How to check the start relay?
Remove the back cover of the refrigerator. Locate the black cylindrical or rectangular piece that fits over the compressor contact. Carefully remove it and shake it. If a ringing sound is heard inside (as if from broken ceramics), then the relay is faulty and requires replacement.
Problems with the No Frost system and fans
In models with the No Frost system, fans are responsible for air circulation. Over time, their bearings wear out, resulting in a rotating hum or whistle. The sound may appear and disappear, especially if the fan operates only when the cooling mode is on.
Another cause of noise in such models is ice freezing on the fan blades or on the walls of the air ducts. Ice chips can get into the mechanism, causing cracking and buzzing noises. This often happens due to a malfunction of the defrosting system, when the moisture does not have time to evaporate and freezes in the wrong places.
If the Indesit refrigerator hums at the moment when you open the door, or, conversely, the sound disappears when opening, this is almost guaranteed to indicate to the fan. In some models, when the door is opened, the fan stops, and if the noise disappears with it, the diagnosis is obvious.
To eliminate the problem, it may be necessary to completely defrost the unit within 24 hours. If after this the sound returns after a few days, it means that the operation of the defrost sensors or the evaporator heating element is disrupted.
The influence of foreign objects and chamber filling
Sometimes the answer to the question “why is the refrigerator humming” turns out to be banal. Vibration from the compressor is transmitted to shelves, drawers and even to dishes placed inside. A glass bottle touching another can create a resonating sound that is amplified by the cabinet.
Check that all shelves and slides are tightly seated. Plastic elements dry out over time and begin to play. It is enough to place a small piece of foam rubber or tighten the fastening screws to eliminate rattling.
It is also worth inspecting the back of the refrigerator, where the condenser is located (black grille). If hoses, wires or other communications are leaning against it, they will vibrate in time with the operation of the motor, creating an obsessive noise.
When professional repairs are necessary
There are a number of symptoms in which independent actions are useless or dangerous. If the refrigerator is humming, and the temperature in the chambers has stopped decreasing, or a “coat” of ice has appeared on the walls, a technician’s intervention is required. This may indicate a freon leak or a clogged capillary system.
Replacing a compressor is a complex technical procedure that requires special equipment for evacuation of the system and charging with refrigerant. It is impossible to perform this operation efficiently at home.
Professional diagnostics are also needed if the humming is accompanied by a burning smell or melting of the insulation. In this case, you must immediately disconnect the device from the power supply.
Prevention and care of Indesit equipment
To extend the life of the refrigerator and reduce the noise level, it is necessary to regularly clean the condenser from dust. A heat exchanger clogged with dust causes the compressor to work longer and more intensely, which increases noise levels and energy consumption.
Monitor the condition of the door seals. If they allow warm air to pass through, the refrigerator will turn on more often, which means it will make noise longer. Wipe the seals with a soft cloth and check their fit.
Regular, at least once a year, complete defrosting (even for the No Frost system) will help prevent the formation of ice plugs in the drainage and on the fans, which are a common cause of extraneous sounds.
Why does the new Indesit refrigerator hum loudly?
New refrigerators may make a louder noise due to deteriorated compressor parts. The cause may also be improper transportation if the device has been lying on its side for a long time and oil has entered the circulation circuit. Let it stand upright for 4-6 hours before turning it on.
Can a refrigerator hum due to power surges?
Yes, unstable voltage in the network causes the motor to overload, which causes a hum. In regions with poor power supply, it is recommended to use a voltage stabilizer or voltage control relay.
Is it normal for the refrigerator to hum after defrosting?
Immediately after defrosting and turning on, the refrigerator may work louder than usual, since it needs to gain temperature from zero. If after 5-7 hours of operation the sound does not return to normal, it is worth checking whether water has entered the electrical components during washing.