The appearance of extraneous sounds in the operation of household appliances always causes concern for the owner, especially when it comes to such an important unit as refrigerator. If your Indesit suddenly begins to make cracking, clicking or buzzing noises, this can signal either harmless expansion of materials or serious mechanical problems. You should not ignore these signals, since timely diagnostics help to avoid costly repairs or damage to products.
In this article we will analyze in detail the physical and technical causes of cracking noise in refrigerators of the brand Indesit. You will learn in which cases you don’t have to worry, and when you need to urgently call a technician or diagnose the components yourself. Understanding the nature of sound is the first step to restoring silence in the kitchen and extending the life of your equipment.
Natural physical processes: expansion and contraction
The most common and absolutely safe cause of crackling noise is thermal expansion of materials. The inner walls of the chamber, made of plastic, and the metal elements of the evaporator have different expansion coefficients. When there is a sudden change in temperature, for example, after a defrost cycle or when the compressor is turned on, the materials change their volume, which is accompanied by a characteristic sound resembling crackling or clicking.
Usually such sounds are loudest immediately after installing a new refrigerator or after it has been defrosted. During this period plastic the full cycle of adaptation to constant temperature changes has not yet gone through. If the cracking noise is heard irregularly and is not accompanied by other alarming symptoms, such as lack of cold or overheating of the case, then most likely everything is in order with your Indesit plastic
⚠️ Attention: If the crackling noise is heard constantly and is accompanied by vibration that is transmitted to the floor or furniture, Check the installation stability of the unit. Incorrect position of the legs can enhance the resonance of the natural sounds of expansion.
It is important to distinguish the nature of the sound. Natural expansion usually sounds like single, infrequent clicks or short bursts of crackling sounds. If you hear a continuous crackling sound, reminiscent of a Geiger counter, this may indicate problems with the electrical wiring or poor contact in the circuit, which requires the intervention of a specialist.
No Frost system malfunctions and ice jams
In models Indesit with the system No Frost crackling is often associated with automatic defrosting. Unlike the drip system, here the evaporator is hidden behind the back wall, and the ice formed on it is periodically melted by the heating element. If the drainage hole becomes clogged with crumbs or ice, the water does not have time to drain and freezes again, forming an ice plug.
When the heater is turned on, the ice mass may crack or chip, making loud sounds. In addition, the thermoelectric heater itself, when heating, also makes sounds similar to crackling or hissing, which is normal, but only if this occurs during the defrost cycle. If the ice crust becomes too large, it can interfere with the operation of the fan, causing additional noise and friction of the blades on the ice. Heating element (thermoelectric heater) also makes sounds similar to cracking or hissing when heating up, which is normal, but only if this occurs during the defrost cycle. If the ice crust becomes too large, it can interfere with the fan's operation, causing additional noise and friction between the blades and the ice.
How to check the No Frost system without disassembling?
Plug in the refrigerator and listen. If 10-15 minutes after switching on you hear gurgling and occasional crackling, and then there is silence, the system is working normally. A loud crunching sound from the fan indicates icing.
To eliminate this problem, it is often necessary to completely defrost the refrigerator while it is turned off during the day. This will allow the ice to completely melt and clear the drainage channel. In some cases, it is necessary to replace a faulty Heating element or defrost sensor if the system has ceased to correctly regulate heating cycles.
Problems with the compressor and start relay
One of the most serious causes of crackling noise is a malfunction of the motor-compressor or start relay. Compressor is the heart of the refrigerator, and any knocking or crackling noises coming directly from it require attention. Often a cracking noise occurs when you try to start the engine when the start relay is activated.
If the start relay is worn out or faulty, it may click or crackle while trying to start the compressor, but the engine will not start and stalls after a few seconds. This cycle can be repeated endlessly until you unplug the device. In such cases, traces of burning or melting of plastic are often visible on the relay.
Also, a crackling sound inside a running compressor may indicate mechanical wear of the piston group or valves. This is the so-called “metallic” crackling sound, which differs from the sound of plastic expansion in its sonority and rhythm, coinciding with the engine cycles.
| Sound type | Probable cause | Need for repair |
|---|---|---|
| Rare clicks plastic | Thermal expansion | Not required |
| Crackling sound at startup + humming | Faulty start relay | Replacing the relay |
| Metallic knock inside | Compressor wear | Replacement of the compressor |
| Fan cracking | Ice on the blades or bearing wear | Defrost or replacement |
⚠️ Attention: If you hear a loud cracking sound and smell something burning or see sparking in the compressor area, immediately unplug the refrigerator from the power supply. Operating a faulty compressor can lead to a wiring fire.
Vibration and contact of tubes
Sometimes the source of the crackling noise lies not in the internal components, but in the vibration of external elements. During transportation or simply over time copper tubes the refrigeration circuit located at the back of the unit may shift and begin to come into contact with each other or with the walls of the housing.
When the compressor operates, vibration occurs, which is transmitted to the tubes. If they touch each other, a rattling crack is heard. An improperly fixed condenser grille (radiator) on the rear wall can also be a source of noise. Quite often, owners themselves accidentally touch the tubes when cleaning, violating their geometry.
Fixing this problem does not require complex diagnostics. It is necessary to carefully move the refrigerator away from the wall, gain access to the back panel and visually inspect the location of the tubes. If points of contact are found, they must be carefully separated with your hands (with the appliance turned off!), being careful not to damage the thin metal.
☑️ Checking external causes of noise
Fan malfunctions in chamber
In refrigerators Indesit with a complete defrosting system, a fan is responsible for air circulation. If you hear a crackling sound coming from deep in the freezer or refrigerator compartment, most likely the problem lies in this unit. The fan blades may touch accumulated ice if the defrosting system has failed.
Another option is wear of the bearing or bushing of the fan motor. In this case, the crackling turns into a hum or howl, which intensifies over time. The lubricant in the bearings dries out, and the metal parts begin to rub against each other, producing an unpleasant grinding noise.
Replacing the fan is a relatively simple procedure, but requires disassembling the inner panel of the camera. It is important to choose an original spare part or a high-quality analogue, since non-original fans may be louder or have a different resource.
Electrical discharges and wiring
The most dangerous type of crackling noise is the sound of an electric arc. If the cracking sound resembles the sound of a transformer operating or sparking, and at the same time the lights in the room flicker or the machine knocks out, the problem lies in the electrical part. This may be an insulation breakdown, a malfunction of the plug, socket or internal contacts.
Often the crackling noise comes from the thermostat or sensors if carbon deposits have formed in their contacts. When the circuit opens, a micro-sparking occurs, which gives the sound effect. It is also worth checking the condition of the network cable: if it is pinched or melted, this can cause a characteristic crackling sound.
When professional repairs are required
There are a number of symptoms for which self-repair not only will not help, but will also worsen the situation. If the cracking sound is accompanied by a lack of cold, freezing of food in the refrigerator compartment (where they should not be) or constant cyclic on/off of the compressor, professional diagnostics.
The master will be able to accurately determine whether the problem lies in a freon leak, a clogged capillary system, or a failure of the control electronics. Modern refrigerators Indesit equipped with complex control modules, the errors of which can only be read using special equipment.
You should not delay contacting service if you notice that the back wall of the refrigerator has become too hot or, conversely, icy. These signs, combined with extraneous sounds, indicate a violation of heat exchange, which directly affects the life of the compressor.
Noise prevention and proper care
To minimize the risk of cracking and other noises, it is important to properly care for the equipment. Regular defrosting (even for the No Frost system, preventive maintenance once a year will not hurt), cleaning the drainage holes and checking the seals will help avoid many problems. Do not place hot foods in the chamber, as a sharp temperature change causes the plastic to expand greatly.
Also monitor the installation level of the refrigerator. Use a building level to check for levelness. Incorrect installation creates an extra load on the compressor and increases vibration, which in the long run leads to loosening of the fasteners and the appearance of knocking.
Is it possible to operate a refrigerator if it is cracking?
If the cracking is caused by the expansion of plastic, operation is safe. If the sound is mechanical (compressor, fan) or electrical, using the device may lead to breakdown or fire. In doubtful cases, it is better to turn off the device until the reasons are determined.
Why does a new refrigerator crack more than the old one?
New materials, especially the plastic of the internal chambers, have not yet gone through cycles of compression and expansion, so the sounds of thermal deformation in them are more pronounced. Over time, the plastic “gets used to” and the noise becomes quieter.
How to distinguish the crack of a compressor from the crack of plastic?
Plastic cracks chaotically, often after turning it on or off. The compressor emits a rhythmic metallic knocking or crackling noise during its operation, which may be accompanied by vibration of the housing.
Is it necessary to change the compressor if it starts to crack?
Not always. Sometimes it is enough to replace the start relay or eliminate tube vibration. However, if the crackling noise comes from inside the motor housing, this is a sign of mechanical failure, and replacement of the compressor is inevitable.