The situation when Indesit refrigerator makes unusual sounds often takes owners by surprise. Normally, equipment should operate quietly, producing only the barely audible hum of a compressor or gurgling of refrigerant. However, the appearance of a loud knock, hum, whistle or buzzing indicates a malfunction. Ignoring these symptoms can lead to serious damage to the unit and spoilage of products.
Before calling a technician, it is necessary to carry out an initial diagnosis. Many problems that cause noise can be fixed on your own without special technical knowledge. Often the source of extraneous sounds is incorrect installation or contamination of parts, and not engine failure. In this article we will analyze in detail all possible causes and methods for solving them.
Primary diagnosis: normal or breakdown?
Not every sound is a sign of a malfunction. Modern refrigerators Indesit equipped with No Frost or static cooling systems, the operation of which is accompanied by a specific acoustic background. It is important to learn to distinguish between operating noises and alarm signals. If the hum is monotonous and quiet, and the cold remains inside the chamber, most likely the equipment is functioning normally.
The alarm should be sounded if refrigerator noise became sharp, intermittent or too loud. A knocking sound that sounds like metal hitting metal or a high-pitched whistle requires immediate attention. Also pay attention to the vibration of the housing: if it is transmitted to the floor or furniture, this upsets the balance of the unit. In some cases, a loud sound may be due to the fact that the refrigerator has just defrosted and is trying to gain temperature.
To accurately assess the situation, listen to the nature of the sound. A humming sound that turns into a rumble often indicates problems with the compressor. Crackling or clicking noises may indicate a faulty start relay. If you hear rumbling or gurgling, especially after turning off the engine, this, as a rule, normally flows freon through the system pipes.
Problems with installation and vibration of the case
One of the most common reasons why The Indesit refrigerator is humming loudlyis a simple incorrect installation. If the unit is not level, resonance occurs, increasing the vibration of the running motor. The vibration is transmitted to the floor, walls and nearby objects, creating the effect of loud noise. Check the position of the legs of the refrigerator.
Foreign objects can also become a source of rattling. Bottles, jars or kitchen utensils placed on the top panel or close to the walls begin to vibrate along with the body. Even an empty shelf inside the camera, if it is not securely fixed, can make an unpleasant ringing sound. Make sure that there is a gap between the refrigerator and the furniture.
☑️ Checking the installation of the refrigerator
⚠️ Attention: If the refrigerator is located close to a wall or furniture, vibration can be transmitted to building structures, creating the illusion of breakage. Leave a gap of at least 5 centimeters on all sides for free air circulation.
To eliminate vibration, use a building level. Height adjustment is carried out by rotating the legs at the bottom of the body. If the floor is slippery, place special anti-vibration pads or a piece of thick rubber under the feet. This will help dampen vibrations and reduce the overall noise level.
Faults of the compressor and start relay
The heart of any refrigerator is compressor. If this unit is worn out or faulty, noise becomes the main symptom. Older compressor models may make a louder noise due to wear and tear on the internal mechanisms. However, if the hum is replaced by a metallic clanging or knocking, this indicates destruction of the engine mount or damage to the valves.
A frequent cause of knocking at startup is starting relay. This small element is responsible for starting the engine. If the relay contacts are burnt or the mechanism is jammed, when you try to start, a loud click is heard, followed by a buzzing sound and shutdown. After some time, the cycle repeats. In this case, the relay must be replaced.
In more complex cases, when the compressor runs “peddling” and makes a loud roar, it may be necessary to replace the unit itself. This is an expensive repair that requires professional intervention, since pumping and refueling are required refrigerant. It is strictly forbidden to open the compressor circuit on your own.
Compressor life
Modern Indesit compressors are designed for 10-15 years of operation. However, frequent voltage fluctuations in the network can significantly reduce their service life. For protection, it is recommended to use a voltage stabilizer.
| Sound type | Probable cause | Difficulty of repair | Required actions |
|---|---|---|---|
| Loud metallic knocking | Destruction of the compressor suspension | High | Replacement of the compressor |
| Clicking and buzzing | Faulty start relay | Low | Relay relay |
| Smooth strong hum | Motor wear or overload | Medium | Diagnostics electricians |
| Case vibration | Incorrect installation | Minimum | Adjustment of legs |
Fan noise in No Frost systems
In refrigerators Indesit No Frost a fan is responsible for circulating cold air. Over time, its bearings wear out, resulting in a howling, humming or crackling sound. This sound is especially noticeable immediately after opening the door, when the fan should stop, but continues to make noise due to inertia or malfunction.
Another common cause of fan noise is ice freezing on the blades. If the defrost system is not working correctly, a layer of ice can interfere with rotation, causing a characteristic cracking sound. In this case, the refrigerator must be completely defrosted within 24 hours.
To replace the fan, you must gain access to the back wall of the freezer or refrigerator compartment. Before starting work, be sure to disconnect the equipment from the network. Remove the plastic panel, disconnect the fan power connector and install a new part. Don't forget to check whether the blades of the new element rotate freely.
Extraneous sounds of refrigerant and pipes
Often owners are frightened by sounds that are actually normal for the operation of the cooling system. Refrigerant, moving through the condenser and evaporator tubes, it can make sounds of gurgling, hissing or fluid transfusion. These sounds are loudest immediately after the compressor starts or when it stops, when the pressure in the system is equalized.
A cracking sound is also possible, resulting from thermal expansion and contraction of plastic and metal parts of the housing. With a sharp change in temperature inside the chambers, the materials change their volume, which is accompanied by clicks. This is absolutely normal and does not require repair.
However, if the hissing becomes constant and is accompanied by a lack of cold, this may indicate a freon leak. There may be a whistle at the gas outlet. A refrigerant leak is a critical malfunction that requires finding the location of the circuit damage and professional refilling. You cannot operate a refrigerator with a leak.
⚠️ Attention: Never try to solder the cooling system pipes yourself or add freon without vacuuming the system. This will lead to complete failure of the refrigerator and can be hazardous to health.
The influence of loading and placement of products
Sometimes the source of noise is the products themselves. If bottles or glass jars are placed close to each other or touch the walls of the chamber, they will rattle when vibrating. Check the contents of shelves and door pockets. Heavy objects on the door can cause additional play and knocking when slamming.
Improper loading also affects the operation of the fan. If food is placed too close to the back wall, it may block the air circulation channels. This forces the fan to work with increased load, which increases the noise level and leads to freezing.
Follow the storage rules: do not put hot foods in the refrigerator, leave space for air between foods. This will not only reduce noise, but will also ensure uniform cooling, extending the service life of the unit. The correct distribution of products inside the chambers is an easy way to reduce the load on the cooling system and reduce the noise level without repair..
When you need to call a technician
There are a number of situations, when independent repair is impossible or dangerous. If, after checking the installation, defrosting and removing foreign objects the refrigerator continues to make noise, the problem lies inside the technical components. In such cases, diagnostics using special tools is required.
A call to a specialist is required for the following symptoms: the compressor gets very hot and hums, but does not start; there is a smell of burning or burnt insulation; Oil stains appeared on the floor under the refrigerator. These signs indicate serious damage to the electrical part or a violation of the tightness of the circuit.
A professional technician will be able to accurately determine the cause using pressure gauges and testers. It will replace the compressor, filter drier or restore the tightness of the system. Remember that qualified repairs are often cheaper than trying to repair complex equipment yourself and completely break it.
Why does the refrigerator hum only at night?
At night, the overall noise level in the apartment decreases, and the operation of the refrigerator becomes more noticeable. Also, the network voltage may drop at night, which causes the compressor to work harder and make more noise. In addition, the lack of daytime activity makes the hearing more sensitive to extraneous sounds.
Is it possible to lubricate a compressor if it starts to hum?
Modern compressors of Indesit refrigerators are sealed units. They are not intended for home maintenance or lubrication. Attempting to drill the housing or disassemble it will result in freon leakage and failure. If the compressor is humming due to mechanical wear, it needs to be replaced entirely.
How often do you need to defrost an Indesit refrigerator?
Models with the No Frost system do not require manual defrosting; it is enough to wash them 1-2 times a year. Models with a drip system (crying wall) in the refrigerator compartment also do not need frequent defrosting, but it is recommended to defrost a manual freezer when a layer of ice more than 5 mm thick forms, usually once every 6-12 months.