Situation, when Indesit refrigerator suddenly begins to make extraneous sounds, it can scare any owner. Instead of the usual smooth hum or silence between operation cycles, the device makes sharp knocks, clicks or obsessive rattling. This is not just discomfort that interferes with rest, but also an alarming signal that the cooling system has failed. Many users mistakenly believe that any noise is the norm, but modern models should operate almost silently.
Before calling a technician or panicking, it is necessary to carry out an initial diagnosis. Refrigeration equipment Indesit, like any other equipment, has its own design features. Some sounds may result from natural physical processes, such as the movement of refrigerant or thermal expansion of materials. However, there are also mechanical failures, which, if ignored, can lead to the failure of an expensive compressor. In this article we will analyze in detail all the possible causes of knocking.
It is important to understand that the nature of the sound often suggests where exactly the problem lies. A dull knock may indicate that the motor is running, a ringing clang may indicate problems with the fasteners, and periodic clicking sounds may indicate a malfunction in the defrost system. Accurate diagnosis at the initial stage, it will help save time and money by allowing you to fix a minor fault yourself. If the problem is more serious, you will know what to prepare for when you visit a specialist.
Natural sounds of refrigeration equipment
Not every sound made by your unitis a sign of a breakdown. The design of the refrigerator involves many moving parts and constant temperature changes, which inevitably leads to acoustic effects. For example, when you turn it on for the first time or after defrosting, it may seethe and gurgle inside the tubes freon. This is absolutely normal and indicates that the refrigerant circulates through the system, performing its cooling function.
It is also worth considering the thermal expansion of materials. The plastic of the inner chamber and metal elements may produce characteristic clicks or crackles when heated or cooled. This happens especially often in models with a No Frostsystem, where defrost cycles start automatically. If the Indesit refrigerator makes a quiet knock only when the motor is turned on or off, this may be a feature of the start relay.
⚠️ Attention: If quiet clicks and gurgles are replaced by a loud, rhythmic knock that makes it difficult to be in the kitchen, this is already beyond the norm. Natural sounds should not be sharp or frightening.
In order to distinguish normality from pathology, listen to the rhythm. Natural sounds are usually chaotic or tied to specific phases of the cycle (start/stop). A constant, increasing knocking noise requires intervention. Owners of new models should remember that the equipment may have a “break-in” period when the compressor parts are ground in.
Installation problems and external factors
One of the most commonplace, but common reasons for knocking Indesit refrigeratoris incorrect installation. If the device is not level, vibration from the operating compressor is transmitted to the housing and intensifies, causing rattling or knocking on nearby objects. Even a slight misalignment can cause the internal parts to come into contact with each other with greater force.
Check the distance between the back wall of the refrigerator and the wall of the room. The gap should be at least 5-10 cm for free air circulation. If the refrigerator is moved close, vibration is transmitted to building structures, creating a resonating hum and knocking. Also inspect the space around: perhaps there is a pan leaning against the body, a bottle is standing, or the shelf of a nearby table is vibrating.
To eliminate these reasons, follow these steps:
- 🔧 Check the adjustment of the support legs and level the body.
- 📏 Move the refrigerator away from the wall and other pieces of furniture.
- 🧹 Remove all foreign objects from the top panel and in the immediate vicinity.
- 👐 Lightly press on the body: if the rattling stops, it means that the vibration was transmitted to an unstable surface.
Often users forget about the transport bolts or fixing items that may have remained inside after purchase. In some models, the Indesit compressor may have additional locking washers that must be removed before operation. Their presence causes severe vibration and the knocking of metal on metal.
Faults in the compressor and start relay
If external factors are excluded, most likely the source of the noise is inside the technical compartment. Compressor This is the heart of the refrigerator, and it is this that most often becomes the culprit of loud sounds. Indesit refrigerators can use both conventional piston and quieter inverter motors. Piston models inherently produce more noise, but a sharp metallic knock is not typical for them.
One of the common problems is the wear of the internal shock absorbers on which the motor-compressor is suspended. Over time, rubber washers or springs lose their elasticity, and during operation, the metal motor housing begins to hit the metal casing or frame of the refrigerator. This creates a characteristic ringing clang, which intensifies when the engine starts.
It is also worth paying attention to the starting relay. If it is faulty, the compressor may try to start, make a loud click, hum for a couple of seconds and turn off again with a characteristic knock. This condition is called “thermal shock” of the compressor. If you do not replace the relay in time, the motor may burn out.
| Sound type | Probable cause | Difficulty of repair | Required actions |
|---|---|---|---|
| Loud metal clanging when start | Wear of compressor mounts | Average | Replacement of shock absorbers |
| Single click and silence | Faulty start relay | Low | Replacement of the relay |
| Rhythmic knocking inside the motor | Wear of the piston group | High | Replacement of the compressor |
| Humming turning into knocking | Warpness or wedge of the engine | High | Diagnostics by a master |
To independently check the integrity of the compressor fastenings, you will need access to the rear panel. Important! All work on electrical components is carried out only when the device is disconnected from the network. Remove the rear cover and visually inspect the motor mount. If gaps or damage to the rubber are visible, the problem can be solved by replacing these cheap parts.
Failures in the defrost system and fan
In models with the system No Frost the fan is responsible for circulating cold air. If Indesit refrigerator knocks, especially in the freezer, this unit is often the cause. The fan blades can become coated with an ice crust, which, when rotating, touches the walls of the casing, creating cracking and knocking noises. This occurs when defrosting cycles are disrupted.
A malfunction of the defrosting heating element, temperature sensor or timer leads to the fact that the ice does not have time to melt and accumulates. At some point, frozen slush begins to interfere with the rotation of the impeller. The sound can be very loud and frightening, reminiscent of a drill or ratchet. Typically, this noise appears periodically, immediately after turning on the compressor.
To confirm this hypothesis, completely defrost the refrigerator:
- ❄️ Disconnect the appliance from the power supply for at least 12-24 hours.
- 🚪 Keep the doors open for access air.
- 🧽 Remove all water and wipe the camera dry.
- 🔌 Turn on the refrigerator and listen to see if the noise has disappeared.
If the knocking noise disappears after defrosting, but appears again after 1-2 weeks, it means that the defrosting system is not working correctly and requires replacing one of its elements. Ignoring this problem will lead to ice reaching the compressor itself or completely jamming the fan.
⚠️ Attention: Do not try to remove ice from the fan blades with a knife or sharp objects. You may damage the plastic or touch the wiring, causing a short circuit. Use only natural defrosting.
Rattling of tubes and internal elements
Sometimes the source of sound lies in the banal contact of copper tubes of the refrigeration circuit. During operation, the compressor creates vibration, which is transmitted to the entire pipeline. If the tubes are located too close to each other or to the cabinet walls, they begin to hit the metal, making a loud, high-pitched knocking sound. In refrigerators Indesit this can happen after transportation or simply over time.
Also check the internal shelves and drawers. Often, users place glassware so that it touches the walls of the chamber, or do not close the freezer drawers all the way. When the motor vibrates, these objects begin to rattle. Pay special attention to plastic lids on shelves and bottle holders on the door - they often become sources of resonating noise.
Care is required to eliminate pipe noise. It is necessary to slightly bend the tubes from each other by hand (with the refrigerator turned off) or using a soft tool, ensuring a gap of several millimeters. Sometimes installing special rubber gaskets or clamps at the contact points helps.
Why does it knock only at night?
During the day, extraneous noises mask the sound of operating equipment. At night, in silence, even a slight rattling becomes noticeable. In addition, at night the voltage in the network may be more stable, which affects the operation of the motor.
When you need to call a specialist
There are a number of symptoms in which self-repair is not only ineffective, but also dangerous. If Indesit refrigerator makes sounds accompanied by a burning smell, smoke or sparking, immediately unplug it. Also an alarming signal is the situation when the engine hums, knocks, but does not start, or starts for a few seconds and stalls.
Interference with the refrigerant circulation system is prohibited without a license and special equipment. If you suspect a freon leak or a malfunction of the compressor itself (for example, you can hear the knocking of valves inside the sealed housing), it is better not to take risks. An attempt at self-repair may lead to permanent breakdown of the unit.
Contact the service center if:
- 🛑 The compressor gets very hot and smells of burnt wiring.
- 🛑 The refrigerator has stopped freezing, but the motor continues to work noise.
- 🛑 You see oily spots under the refrigerator or on the back wall.
- 🛑 After defrosting and checking the fasteners, the knocking did not stop.
A professional technician has the necessary tools to diagnose the electrical circuit and pressure in the system. He will be able to accurately determine whether the compressor needs to be replaced, refilled with freon, or the control board needs to be repaired. Remember that high-quality repairs are often cheaper than buying a new refrigerator.
Prevention of noisy operation
To Your Indesit has been pleased with the silence for many years, it is important to follow the operating rules. Regularly, at least once every six months, inspect the back of the refrigerator. Remove dust from the condenser grid and compressor, as contamination leads to overheating and increased load on the motor, which increases noise.
Make sure that the food in the chamber is evenly distributed and the door is closed tightly. An overloaded refrigerator works in increased mode, which also affects the noise level. Check the integrity of the sealing rubber: if it does not fit tightly, the compressor will turn on more often.
☑️ Monthly check of silence
If you notice that the nature of the sound has changed, do not wait for a final breakdown. Early diagnosis allows you to eliminate the problem at a stage when it has not yet caused damage to the family budget. Taking good care of your equipment is the key to its long and quiet service.
Why does the Indesit refrigerator knock only when turned on?
A knock when turned on is most often associated with the starting torque. At this moment, the motor experiences maximum load. If the compressor mounts are worn out or the start relay is faulty, it is at this second that the shock occurs. Water hammer in the system is also possible if the refrigerant did not have time to evaporate completely before stopping the previous cycle.
Is it possible to operate a refrigerator if it knocks a little?
Short-term operation is possible if the knocking is not accompanied by a lack of cold or overheating. However, ignoring the knock will lead to depressurization of the tubes, broken wires or breakdown of the compressor. It is better to eliminate the cause of the noise as soon as possible.
Is it normal for a new Indesit refrigerator to make sounds?
In the first days of operation, a new refrigerator may make various sounds: plastic crackling, freon bubbling, relay clicks. This is a period of adaptation of materials and grinding in of parts. If after 3-5 days the loud knocking does not disappear, this may be a manufacturing defect, and the device should be checked under warranty.