A sudden extraneous sound in kitchen appliances can frighten any owner, because it often signals a hidden malfunction. If The refrigerator is cracking, this symptom cannot be ignored, since it may hide either a banal violation of operating rules or a serious breakdown of the unit components. In this article we will analyze in detail the nature of the occurrence of crackling, methods of primary diagnosis and ways to solve the problem.
Modern models of household appliances operate quite quietly, so any changes in the acoustic background are immediately noticeable (or in the ears). Crackling, clicking or humming can come from different parts of the case: the back wall, the compressor compartment or inner chamber. Understanding the source of the sound is the first step to a successful repair, which will save money on calling a technician.
It is important to distinguish the nature of the sound: periodic crackling during operation or a continuous, increasing noise. Diagnostics starts with carefully listening to the unit at different moments of its operation. Only after establishing the exact cause can you begin to take active steps to restore the device’s functionality.
Natural physical processes: when noise is the norm
Before you panic and look for a service center phone number, it is necessary to exclude natural causes of sounds. Often, users mistake normal physical processes occurring inside the system for a breakdown. Thermal expansion materials are the main culprit of the quiet crackling noise that is heard during operation and immediately after the compressor is turned off.
The plastic of the internal housing, metal shelves and the evaporator are constantly changing their temperature. When heated or cooled, they may become slightly deformed, producing characteristic sounds. If your refrigerator makes rare clicks or crackling noises only when the engine is turned on and off, most likely everything is fine with it. This is especially typical for new models or devices that have just been defrosted.
⚠️ Attention: If the cracking sound is accompanied by strong vibration of the case or the unit moving from its place, this is no longer the norm. Check the stability of the legs of the refrigerator and the absence of contact of the back wall with furniture or pipes.
Another reason for short-term sounds may be the movement of refrigerant through the system pipes. Liquid freon, flowing from one part of the circuit to another, sometimes gurgles or makes hissing sounds. This is a normal operating process refrigerant circulationthat does not require intervention.
- 🔊 A cracking sound occurs only when the motor is turned on or off.
- 🌡️ The sounds are heard during the period of active defrosting of the evaporator (in No Frost models).
- 🆕 The unit is new or has just been placed in a new location (adaptation of materials).
- ❄️ The noise is quiet, periodic and is not accompanied by other symptoms.
Problems with the compressor: the heart of the refrigerator is acting up
The compressor is the main unit that circulates the refrigerant. If refrigerator cracking it is in the area of the motor located at the bottom rear, this may indicate serious mechanical problems. Often the cause is wear of internal parts or failure of the unit itself.
One of the common causes of cracking is the destruction of the compressor suspension. The motor hangs on springs that dampen vibration. Over time, the metal becomes tired, the springs break or stretch, and the compressor begins to bang against the housing or other parts. This metallic clanging crack sounds very loud and alarming. In this case, it is necessary to replace the shock absorbers or the entire compressor.
The starting relay, which is responsible for starting the engine, can also produce a crackling sound. If the contacts inside the relay are burnt or oxidized, a dry cracking or clicking sound is heard when you try to start, after which the engine may not start or may turn off immediately. This requires replacement start relay, which is a relatively inexpensive procedure.
It is important to listen to whether the nature of the sound changes during operation. If the crackling turns into a hum or knocking, this indicates progressive wear of the bearings or piston group. Operating equipment with a faulty compressor can lead to its complete combustion and costly repairs.
- 🛠️ Destruction of the shock-absorbing springs of the motor suspension.
- ⚡ Malfunction of the starting relay or capacitor.
- 📉 Wear of the shaft bearings compressor.
- 🔧 Loosening of the fastening bolts of the compressor itself.
Malfunctions of the thermostat and defrost system
The thermostat (or thermostat) is responsible for maintaining the set temperature in the chambers. When it clicks, this is normal, as the contacts are opening or closing. However, if the refrigerator is cracking with a characteristic electrical crack, similar to current discharges, this may indicate a breakdown or poor contact inside the thermostat.
In systems No Frost the heating element and timer are responsible for defrosting the evaporator. When switching between “cooling” and “defrosting” modes, clicking noises may be heard. But if the cracking noise is persistent and comes from the evaporator area (usually behind the back wall of the freezer), an ice block may have formed. Ice breaking or the operation of a fan touching ice creates a noise similar to a cracking sound.
⚠️ Attention: If you hear a cracking sound and smell burning or plastic, immediately unplug the refrigerator. This may be a sign of a short circuit in the wiring or thermostat.
The fan is a common problem. In models with air circulation, the fan blades may freeze or touch accumulated ice. This causes a rhythmic crackling or humming noise that intensifies when the engine is running. In this case, you need to completely defrost the unit within 24 hours or replace the faulty fan.
How to check the thermostat yourself?
To check the thermostat, you can try to gently knock on its body (with the refrigerator turned off). If after this the contacts “stick” and the refrigerator stops turning on or, conversely, does not turn off, the part requires replacement. However, it is better to carry out accurate diagnostics with a multimeter.
The influence of incorrect installation and external factors
Sometimes the reason that The refrigerator is crackinglies not in the internal components, but in the conditions of its installation. Incorrect positioning of the unit creates additional stress on the components, causing vibration and resonance. Check if the refrigerator is level on all four legs.
If the unit is skewed, the oil in the compressor may be unevenly distributed, which causes noise during operation. In addition, vibration from the motor is transmitted to the body and increases if the refrigerator touches a wall, cabinet or other objects. Even minimal contact can turn quiet work into loud resonating crackling.
It is also worth paying attention to the floor. If the surface is uneven or slippery, the legs may “walk.” Use a building level to check that the installation is level. Adjusting the height of the legs helps eliminate distortion and reduce noise levels.
- 📏 Lack of gap between the back wall and the wall (minimum 5-10 cm).
- 🏚️ Uneven floor or loose legs of the refrigerator.
- 📦 Contact of the body with nearby furniture or interior items.
- 🌬️ Insufficient ventilation in the niche (for built-in appliances).
Diagnostics and troubleshooting table
To more accurately determine the cause of the noise, it is recommended to conduct a comprehensive diagnosis. It includes a visual inspection, listening to different areas of the unit and analysis of associated symptoms. Below is a table that will help organize the data and understand in which direction to move.
When diagnosing, it is important to pay attention not only to the sound, but also to the behavior of the refrigerator: how it freezes, how often it turns on, whether there is ice. The combination of factors gives a more complete picture than just a sound signal. If you are not confident in your abilities, it is better to entrust the check to a professional technician. data-i="122">Rare clicks when turning on/off to a professional master.
| Sound type | Probable Cause | Localization | Actions |
|---|---|---|---|
| Rare clicks when turning on/off | Thermal expansion, thermostat operation | Internal housing, rear wall | Normal, no repair required |
| Loud metal clanging, vibration | Destruction of the compressor suspension | Bottom, rear part (engine compartment) | Replacing shock absorbers or compressor |
| Electrical crackling, sparking | Faulty wiring, thermostat, relay | Thermostat area, bottom of the unit | Urgent replacement of electrical components |
| Rhythmic crackling, humming | The fan touches the ice or item | Freezer compartment (No Frost) | Defrost, fan replacement |
| Gurgling, hissing | Movement of refrigerant | Across the entire circuit, tubes | Norm of system operation |
Using this table, you can pre-classify the problem. However, remember that some malfunctions may have similar symptoms. For example, the crackling of a fan can be confused with the cracking of ice if you do not remove the back panel of the freezer for a visual inspection.
Do-it-yourself methods for eliminating crackling
If diagnostics have shown that the problem does not require complex repairs using special tools, you can try to eliminate the cracking yourself. The first and easiest step is complete defrosting. Leave the refrigerator turned off for 24 hours with the doors open. This will help melt ice plugs in the defrost system.
The second step is to check the installation. Move the unit away from the wall and check the level of the legs. Make sure nothing is touching the body. If the crackling noise comes from the compressor and you are confident in your abilities, you can check the tightness of the motor mounting bolts. However, climbing inside the electrical part without skills electrical safety is strictly not recommended.
☑️ Checklist before calling a technician
In cases where the crackling sound is caused by a faulty start relay, it can be replaced. The relay is usually mounted on the side or bottom of the compressor. You need to remove the old one, remember the connection diagram and install a new one, identical in markings. This is one of the few operations available to a careful home craftsman.
⚠️ Attention: If your refrigerator is under warranty, any independent repair (even replacing the relay) will void the warranty. In such cases, immediately contact an authorized service.
Prevention and operating rules
To prevent the question “why is the refrigerator cracking” from arising in the future, it is important to follow the operating rules. Defrost regularly, at least once a year, even if you have a No Frost system. This will help avoid the formation of excessive ice, which puts a strain on the system.
Keep the condenser grill at the back of the refrigerator clean. Dust and animal hair impair heat transfer, causing the compressor to work harder and longer, which accelerates its wear. Wipe the grill with a dry brush or vacuum it. Also, do not place hot products in the chamber - this creates a sharp temperature difference and a load on the thermostat. Timely maintenance prolongs the life of the equipment. If you notice changes in the sound of operation, do not expect a complete breakdown. Early detection of a problem often allows you to solve it with little effort by replacing a cheap part instead of an expensive unit. thermostat.
Timely maintenance extends the life of equipment. If you notice changes in the sound of operation, do not expect a complete breakdown. Early detection of a problem often allows you to solve it with little effort by replacing a cheap part instead of an expensive component.
- 🧹 Regular cleaning of the rear grille from dust.
- 🧊 Scheduled defrosting every 6-12 months.
- 🚫 Ban on storage hot products.
- 🔧 Periodically check the tightness of the door.
Why does the refrigerator only rattle at night?
At night the apartment is quieter, and extraneous sounds become more noticeable. In addition, the network voltage may drop at night, which makes it difficult to start the compressor and causes the relay to click louder. Also at night, the fast freezing mode is turned on more often or the defrosting cycle simply begins.
Is it dangerous to continue using the refrigerator if it is cracking?
If the cracking is caused by thermal expansion - no. If you hear an electrical crackle or a strong mechanical knock of the compressor, operation is dangerous. This can lead to a fire, short circuit or permanent failure of the expensive motor.
How much does it cost to repair if the compressor is cracking?
The cost depends on the refrigerator model and region. Replacing the start relay is inexpensive. If you need to replace the compressor itself with freon charging, the price can be a significant part of the cost of a new refrigerator. The technician will tell you the exact amount after diagnostics.
Can a new refrigerator make noise?
Yes, new refrigerators often make sounds during the “break-in” period. The housing and insulation materials adapt to the temperatures, and the compressor parts are ground in. If the cracking does not turn into a rumble and is not accompanied by other symptoms, this is normal.
How to distinguish the cracking of ice from a breakdown?
The cracking of ice is usually heard in the freezer, it is duller and is often accompanied by the sounds of dripping water (if defrosting is in progress). A mechanical breakdown often sounds like a clanging, grinding or dry electrical clicks coming from the engine compartment.