When silence reigns in the kitchen, any extraneous sound becomes noticeable, but the situation gets out of control if the source of the noise is inside household appliances. If you hear something scraping in the refrigerator, this is a signal that there have been changes in the operation of the unit that require your attention. Most often, frightening sounds are associated with natural physical processes, but you should not ignore them, as they may indicate wear of components or violation of operating rules.
The first thing to do when a grinding sound appears is to listen carefully to the nature of the sound and determine its localization. Refrigerantcirculating through the system can make gurgling or hissing sounds, which is normal, but mechanical grinding often indicates friction of parts. In some cases, the culprit is ice growing on the walls of the evaporator, which cracks during defrosting and makes sounds similar to metal scraping on metal.
Do not panic ahead of time, because in many cases the problem can be solved without calling a technician. It is important to carry out a primary investigation, excluding the simplest and most obvious causes, such as incorrectly installed shelves or foreign objects. If, after checking external factors, the noise persists, a more in-depth analysis of the operation of the compressor and ventilation system will be required. diagnosis, excluding the simplest and most obvious reasons, such as incorrectly installed shelves or foreign objects. If, after checking external factors, the noise persists, a more in-depth analysis of the operation of the compressor and ventilation system will be required.
Natural sounds of the compressor and refrigerant operation
Modern refrigeration units, especially models with the system No Frost, produce a whole range of sounds during the process work. When the compressor starts, it creates vibration, which is transmitted to the housing and pipelines. If the refrigerator is not installed level, this vibration increases, and the tubes can touch each other or the cabinet walls, creating a characteristic grinding noise. Check whether furniture or walls are touching the back of the refrigerator.
The circulation of freon through thin capillary tubes may also be accompanied by sounds resembling scraping or flowing of liquid. This occurs due to changes in pressure in the system when refrigerant transitions from a liquid to a gaseous state. Typically, such sounds do not last long and stop after the unit enters operating mode. However, if the sound becomes constant and loud, this may indicate a blockage in the capillary system.
It is important to differentiate the quiet hum of a running engine and sharp, metallic sounds. If the grinding noise appears strictly when the compressor is turned on or off, most likely the problem lies in start relay or the mounts of the motor itself. In older models, rubber shock absorbers dry out over time, and metal begins to rub against metal every time the engine is started.
Ice build-up and problems with the defrost system
One of the most common reasons why something scratches in the refrigerator is the formation of an ice crust on the evaporator In systems No Frost ice builds up on a hidden evaporator, and when the defrosting heating element is turned on, massive pieces of ice can break off and fall, touching the fan or chamber walls. This process is often accompanied by crackling and grinding noises, which frighten the owners.
If you have a refrigerator with a drip system, then ice can accumulate on the back wall of the main chamber. When defrosted or the temperature changes, this layer of ice contracts or expands, producing sounds similar to scraping. This happens especially often if you put hot foods in the chamber or often open the door, increasing the humidity inside.
⚠️ Attention: If the grinding noise is accompanied by the fact that the refrigerator has stopped freezing or there is water on the floor, the defrosting system may be faulty. Do not try to chip the ice with a knife - this can lead to a breakdown of the circuit and leakage of freon.
In some cases, ice blocks the fan blades that drive cold air. The rotating fan begins to touch the ice coat, producing a loud cracking and grinding sound. To eliminate this problem, you need to completely defrost the unit within 24 hours. If after defrosting the sound returns after a few days, it means that the defrost cycle is broken and repair is required No Frost system.
Foreign objects and improper loading of shelves
Before looking for a complex technical malfunction, it is worth excluding trivial causes. Often the source of sound is glass bottles or jars, which, when the compressor vibrates, begin to roll and rub against each other. Check the contents of shelves and door pockets: perhaps some container is too close to the wall or adjacent products.
Another common culprit is the shelves and drawers themselves. If the glass shelf does not sit tightly in the guides or the plastic drawer is skewed, they may vibrate and make an unpleasant grinding noise when the compressor operates. Try removing all the shelves and then reinstalling them, making sure they click into place. Pay special attention to the guides to the drawers - they could have moved.
Sometimes small objects can fall into the gaps between the shelves or behind the back wall: lids, foil, pieces of packaging. When the fan or vibration occurs, these objects may move and scratch the interior surfaces. Carefully inspect the corners of the chambers and the space under the vegetable drawers. Even a small piece of foil caught on the evaporator grill can cause a loud sound.
☑️ Checking the refrigerator load
Fan faults in the freezer
In refrigerators with a system No Frost for Air circulation is provided by a fan located in the freezer compartment or behind the rear panel. Over time, fan bearings can wear out, resulting in humming and grinding noises as the blades rotate. If you hear that the sound is coming from the freezer area, most likely the problem lies here.
In addition to bearing wear, the fan blades may touch frozen ice or frost. This happens if the door seal is broken or the chamber is often opened, which allows moist air to get inside. Ice freezes on the walls of the channel, and the rotating fan begins to “scratch” the ice crust, producing a rhythmic grinding sound.
To diagnose this malfunction, partial disassembly of the freezer is often required. It is necessary to remove the plastic panel covering the evaporator and visually assess the condition of the fan. If ice is visible on the blades, the unit must be defrosted. If nothing interferes with the blades, but when you scroll by hand you feel a backlash or hear a crunching sound, fan to be replaced.
⚠️ Attention: Before any manipulations inside the refrigerator, be sure to disconnect the device from the power supply. Working with live electrical components is life-threatening.
Wear of the mechanical parts of the compressor
If external factors and ice are excluded, and the sound resembles a metal grinding sound coming from the bottom of the unit, the problem may be in the compressor itself. There are moving parts inside the motor-compressor that can wear out over long-term operation. The appearance of extraneous noise often indicates that the resource of of the unit is coming to an end.
It is also worth checking the fastening of the compressor to the frame of the refrigerator. The motor is mounted on springs or rubber shock absorbers that dampen vibration. If these elements dry out, burst or come off, the compressor housing will hit the metal frame or tubes during operation, creating a loud knocking and grinding noise. A visual inspection of the bottom of the refrigerator (often it is necessary to remove the back cover) will help identify this problem.
Another reason is oil getting into the system or lack of it, which leads to the compressor running dry. This is a critical malfunction that requires specialist intervention. If the compressor operates overheating and makes unnatural sounds, its further operation can lead to complete failure and costly repairs.
Is it possible to drive with a faulty compressor?
Transporting a refrigerator with a faulty compressor is extremely undesirable. Vibration can finally finish off already worn-out components, and also lead to tubes being torn off. If transportation cannot be avoided, fix the compressor with bolts (if the design allows) or rigid stops, but it is better to call a specialist to dismantle the motor before transportation.
Diagnostic table for refrigerator sounds
To more accurately determine the cause of the noise, use the table that contains the main types of sounds and their probable sources. This will help you formulate the problem when contacting a service center or understand whether you can handle it yourself.
| Sound type | Probable cause | Localization | Difficulty of repair |
|---|---|---|---|
| Rhythmic grinding | Fan touches ice | Freezer compartment | Low (defrosting) |
| Metal clanging | Vibration of tubes or compressor | Rear wall/Bottom | Middle (correct installation) |
| Crackling and clicking | Ice chipping during defrosting | Inside the chamber | Low (normal or defective defrost) |
| Humming with grinding | Fan bearing wear | Freezer | Medium (fan replacement) |
| Strong knocking at start | Faulty start relay | Compressor | Medium (relay replacement) |
When you need to call a repairman
Despite the fact that many causes of grinding can be eliminated on your own, there are situations when professional intervention cannot be avoided. If you have carried out a complete defrost, checked the stability of the unit and removed unnecessary objects, but the sound has not disappeared, the problem probably lies in a technical malfunction of the components. It is especially alarming if the grinding noise is accompanied by an increase in temperature in the chambers.
Complicated cases require disassembling the unit, checking the electrical circuits and using special tools. For example, replacing a fan in a system No Frost often requires dismantling the internal casing, which without experience can lead to breakage of the plastic latches. A technician is also needed to diagnose the compressor and check the level freon in the system.
You should not delay repairs if you notice that the refrigerator has started working longer than usual or is turning on more often. A grinding noise combined with these symptoms indicates that the unit is operating under increased load. Timely contact with a specialist will help avoid costly replacement of the compressor and loss of food.
Why does the refrigerator scrape immediately after turning on?
The sound of a grinding sound immediately after switching on is most often associated with compressor starting currents or the operation of the defrost system. At the moment of starting, the motor experiences maximum load, and if the fastenings are loosened, vibration occurs. Also at this moment, the fan may turn on, which, in the presence of ice, makes a grinding noise.
Is it dangerous to operate the refrigerator if it grinds?
If the grinding noise is caused by vibration or ice, short-term operation is acceptable, but the problem needs to be solved. If the sound comes from the compressor itself (metallic knocking), further work can lead to its wedge and complete failure, so it is better to turn off the device until the technician arrives.
Can a new refrigerator grind?
Yes, a new refrigerator can make sounds during the “break-in” period. The compressor parts are ground in and the oil is distributed. Also, during the first freeze, the ice may crack. However, a loud metallic grinding sound is not typical for new equipment and may be an installation defect or a defect.