A sudden crackling sound in the refrigerator Indesit can unsettle any owner. Equipment that worked silently just yesterday begins to make frightening sounds, reminiscent of electric shocks or metal friction. For many users, this becomes a signal of imminent breakdown and expensive repairs, but you should not rush to conclusions. Often the source of noise lies in trivial things that do not require the intervention of a specialist.
Modern refrigerators Indesit are equipped with complex refrigerant circulation and temperature control systems that physically cannot operate absolutely silently. The expansion of materials, the movement of freon through the tubes and the operation of automation - all this creates an acoustic background. However, it is important to be able to distinguish a normal operating hum from warning signs of a malfunction. In this article, we will analyze in detail all the possible causes of the crackling sound and help you determine when the equipment can be repaired yourself, and when you need to call a specialist.
The first thing you need to do when a sound appears is to listen carefully to its nature and frequency. Does it sound like a short clicking sound or a continuous hum? Does it appear immediately after switching on or only when the door is opened? The further plan of action will depend on the accuracy of your initial diagnosis. A sharp, loud crack, accompanied by a stop in the operation of the unit, is a critical sign of an electrical malfunction.
Natural physical processes and operation of automation
Often owners are faced with a situation where the refrigerator makes sounds that are not a sign of a breakdown. The design of household appliances Indesit involves the use of materials with different coefficients of thermal expansion. When cooled or heated, plastic, metal and insulation change their size, which can be accompanied by a characteristic cracking sound. This is especially noticeable in new models or after defrosting.
In addition, in systems with No Frost or Full No Frost, automatic defrosting is regularly triggered. The heating element heats the evaporator, and the ice, turning into water, can flow into the drainage system with a characteristic sound. It is also worth considering the operation of the thermostat or electronic control module, which periodically clicks, turning the compressor on and off.
- 🔊 Thermal expansion: Crackling of plastic or metal when the temperature inside the chambers changes.
- 💧 Defrosting system: Sounds of dripping water or crackling of melting ice in defrost mode.
- ⚡ Compressor relay: Short click when starting or stopping the engine.
If the sounds are periodic and are not accompanied by other symptoms, most likely the equipment is working. However, if the crackling becomes louder or changes in tone, it is worth conducting a more in-depth diagnosis.
Problems with installation and alignment of the case
One of the most common causes of extraneous noise is improper installation of the refrigerator. If the housing is unstable or skewed, vibrations from the operating compressor are transmitted to the floor and walls, intensifying and creating a resonating crackling sound. Even a microscopic misalignment can cause internal parts to come into contact with each other.
Check the horizontal installation using a building level. The legs of the refrigerator Indesit equipped with adjusting screws that allow you to compensate for uneven floors. It is important that the device stands stable and does not wobble when lightly pressing on the corners. Also make sure that the back wall does not touch the wall of the room, since vibration can be transmitted to building structures.
☑️ Checking the installation of the refrigerator
Sometimes the source of sound is objects standing on the top lid of the refrigerator or inside the chambers. Heavy cans or unstable dishes may vibrate and rattle as the motor operates. Inspect the shelves and top surface to eliminate this factor.
⚠️ Attention: If the cracking noise does not stop after aligning the legs, do not try to forcefully press or tilt the body. This can lead to damage to the door hinges or disruption of the cabinet geometry.
Malfunctions of the defrost and drainage system
In refrigerators with the system No Frost a frequent cause of cracking is the formation of excess ice on the evaporator. If the defrosting system does not work correctly, ice builds up and when the compressor is running or the heating element is turned on, it begins to crack and break off. Pieces of ice can fall onto heating elements or fans, creating loud noises.
A clogged drain also leads to the accumulation of water, which expands and cracks when it freezes. Water can freeze in the tray under the evaporator, creating an ice block. When heated, the ice cracks, producing sounds similar to gunshots or a strong crunch. Regular defrosting helps to avoid such situations.
To check the defrost system it is necessary:
- ❄️ Inspect the evaporator: For the presence of a thick layer of ice (removing the back panel is required).
- 🌡️ Check the heating element: Is the heating element working in defrost mode.
- 🚿 Clean the drainage: Make sure that water flows freely.
If you find a thick layer of ice, the defrost timer or temperature sensor may have failed. In this case, replacement of defective parts is required.
How to properly defrost an Indesit refrigerator?
Unplug the appliance, open the doors and leave for 12-24 hours. Do not use a hair dryer or hot water to speed up the process - this may damage the plastic and evaporator tubes. Collect water in trays and thoroughly wipe the chambers dry before turning them on.
Mechanical damage and wear of parts
Over time, the internal components of the refrigerator may wear out or become dislodged. The vibration that occurs during compressor operation gradually weakens the fastenings of fans, trays and panels. Loose parts begin to rattle or knock against the walls of the case. Particular attention should be paid to the fan in the freezer: if its blades are covered with ice or it is unbalanced, the crackling will be constant and loud.
It is also worth checking the condition of the compressor shock absorbers. If the rubber seals are dry or cracked, the metal motor housing will vibrate against the refrigerator frame. This creates a low-frequency hum and the occasional metallic clang. Replacing shock absorbers is a simple procedure, accessible even to beginners.
Table of the main mechanical causes of noise:
| Part | Symptom | Solution |
|---|---|---|
| Fan | Constant crackling, buzzing | Lubrication or replacement |
| Shock absorbers | Vibration, knocking when starting | Replacing rubber |
| Shelf fastenings | Glass rattling | Tightening or replacement |
| Condenser tubes | Metal ringing | Bend the tubes away case |
Carefully inspect the back wall of the refrigerator. The condenser tubes (black coil) must not touch each other or the housing. If they touch, carefully (with the appliance turned off!) separate them or lay insulating material.
Electrical faults: relay and compressor
The most serious cause of rattling noise is problems in the electrical part of the refrigerator Indesit. The compressor start relay is the device that provides the impulse to start the engine. If the relay contacts are burnt or the mechanism is stuck, a loud cracking or clicking sound is heard when you try to start, after which the compressor may hum, but not start, or turn off immediately.
The compressor itself can also make a cracking sound when the valves or piston group wear internally. If the sound resembles a metallic clanging sound inside the motor, this indicates serious mechanical failure. In such cases, operating the refrigerator is dangerous and can lead to complete failure of the unit.
Signs of an electrical fault:
- 🔥 Burning smell: Appears when the relay contacts burn.
- 🔌 Frequent shutdowns: Refrigerator turns on, crackles and turns off after a few seconds.
- 📉 Lack of cold: The compressor works (or tries to work), but the temperature does not drop.
⚠️ Attention: Repair of the compressor and Replacing the start relay requires electrical skills. If you are not confident in your abilities, contact a professional technician. A faulty compressor can cause a short circuit.
Diagnostics and methods for eliminating noise
To accurately determine the cause of the crackling sound, it is recommended to carry out consistent diagnostics. Start with visual inspection and listening. Try to localize the source of the sound: is it coming from below (compressor), from behind (relays, tubes) or from inside the chambers (fan, ice). Place your hand on different parts of the case - vibration will help you understand which part is overloaded.
If there is a problem with the installation, align the legs and move the refrigerator away. If the shelves are noisy, fix them. If you suspect ice in the No Frost system, perform a complete defrost. If after these steps the cracking noise persists, it is likely that parts will need to be replaced.
Sequence of diagnostic steps:
- Unplug the refrigerator.
- Defrost for 24 hours.
- Check the stability and position of the tubes behind.
- Turn on the device and listen to changes in the sound.
- If the noise persists, call a technician to check the compressor.
Frequently asked questions (FAQ)
Why does the Indesit refrigerator only crack at night?
At night, the level of extraneous noise in the apartment decreases, and the sounds of operating equipment become more noticeable. In addition, at night the voltage in the electrical network may stabilize or, conversely, jump, which affects the operation of the relay. It is also possible that at night the refrigerator more often goes into freezing mode due to the lack of opening the doors during the day.
Is it dangerous to operate a refrigerator if it makes a cracking noise?
If the cracking noise is caused by thermal expansion or vibration of the dishes, it is safe. However, if the sound comes from the compressor or relay, continued operation may result in motor burnout or fire. In case of electrical crackling, it is better to turn off the device until the technician arrives.
Is it possible to lubricate the compressor if it is cracking?
No, modern compressors in refrigerators Indesit are sealed and cannot be lubricated at home. Attempting to drill a hole or disassemble it will result in freon leakage and permanent failure. The entire assembly needs to be replaced.
How much does it cost to replace a starting relay?
The cost of the relay itself is low, but the price consists of the cost of the part and the work of the technician. Prices may differ in different regions and services, so it is better to check the current cost with official service centers or private craftsmen.