What noise should not bother? The refrigerator may be loud for various reasons. This picture is not a cause for concern when it comes to devices with the No Frost system. For a week after connecting, they can function noisily. This is due to the fact that the power supply after installation was carried out immediately, the equipment did not stand up for several hours.
Some models make noise during the very first ice formation in the freezer., and such a phenomenon is sometimes repeated when the device is completely defrosted and then turned on again. It happens that at startup the compressor motor starts to “growl”, because it needs a large starting current.
Another possible option for loud functioning is setting the maximum negative freezing temperature of products at first start-up. Finally, the presence of transport bolts or improper placement of the unit are possible causes of increased noise.
Reference! If the question of maximum silence is fundamental when choosing home refrigeration equipment, then it is useful to pay attention to the label located on the door. In its lower part, as a rule, the number of decibels is indicated, which will allow you to choose the quietest model.
When noise is a sign of a possible problem
If the cameras are loaded correctly with the products, at the first start you did not forget to remove the transport bolts from the compressor shock absorbers, the device stood for several hours after the final installation, then a loud hum may indicate some kind of malfunction. In the case of used devices, malfunctions that have never before appeared during operation are indicated by malfunctions.
Possible causes of loud noise during refrigerator operation
Incorrect installation of the refrigeration unit
When installing, do not forget to set the housing level. Otherwise, the skewness of the device in the horizontal or vertical plane may cause the compressor unit to come into contact with the metal elements of the pipeline. Another variant - lack of contact of one supporting leg with the floor, which leads to the appearance of vibrations and increased noise.
Extreme capacitor loading
This unit experiences stress and can not cope with the removal of heat into the environment if the refrigeration unit is located close to the wall or is tightly crammed with furniture. Free and sufficient air access to the coil of the heat exchange element plays an important role, allowing it to give off heat well. With the poor functioning of this unit, the compressor experiences additional loads and starts to make noise: you hear the sound of valves and tangible vibration of the engine.
Fan problem
Vibration and fan whistling is only possible in refrigerators with No Frost system. In these models, sometimes two fans are installed, one of which works on cooling the evaporator of the freezer, the other creates optimal conditions for the functioning of the evaporator in the refrigerator. If the operating conditions lead to constant temperature jumps, the lubrication of the electric motor gradually loses its protective properties. The fan begins to make a characteristic loud sound.
In addition to this problem, problems may occur in the operation of the tubular electric heater, which is responsible for the automatic defrosting process. The gradual increase in ice in the chambers leads to the fact that the fan blades begin to touch the formed mass, noise appears.
Malfunctions in an electric circuit
Firstly, sometimes the starting relay fails. A characteristic sign will be a strong "growl" at startup and a quick shutdown of the refrigerator. Secondly, loud noise occurs when the device starts up with burned-out fan motor windings. Thirdly, the windings of the compressor motor winding occur.
In this case, his body will be too hot. Finally, when the electric heater of the evaporator breaks down, an increased load arises on all elements of the system, which increases the noise level.
Incorrect compressor mounting
Long-term operation of refrigeration equipment leads to a weakening of the compressor fasteners, wear of rubber gaskets at the place of its landing. These two factors cause a loud rattle.
Clogged refrigerant piping
With a decrease in the production of cold and an increase in the load on the compressor, extraneous sounds appear. Another reason for this is clogging in the filter or capillary tube. The nature of the blockage has a direct impact on the further operation of the refrigerator, up to its complete stop.
Excess Freon Volume
Such a problem sometimes makes itself felt after the repair, when the refrigerator, filling the system with new freon, introduces an excess of it. Subsequently, this will lead to a certain loss of performance and, as a consequence, to the possible occurrence of additional, unnatural sounds.
Addressing the causes of loud noise
In case of improper installation, it is necessary to align the position of the refrigerator using the building level. It is also necessary to check whether the support legs touch the floor; if necessary, the height of the support element is adjusted due to the thread. If the reason lies in the increased load on the condenser, then in accordance with the operating instructions, it is necessary to ensure a free zone around the refrigeration equipment.
It makes sense to clean the condenser coil from dust, in extreme cases, to completely defrost it. It is worth remembering that monthly preventative cleaning will avoid many problems.
If there is a problem in the ventilation unit, you need to get rid of the ice crust in the chamber, if any, and lubricate the fan bearings. If the problem is improper mounting of the compressor, then it is worth checking the quality of the fasteners. If necessary, replace the old elements.
When professional help is needed
In the event of malfunctions in the electrical circuit and in the absence of skills for appropriate repair work, it is better to entrust the case to the master (electrician or refrigerator). If you have experience, you can solve the problem by checking the corresponding nodes with the tester and replacing the failed elements.
In the presence of increased noise due to the excessive amount of freon or clogging of the pipeline, professional help is indispensable. Cleaning the system and getting rid of excess refrigerant is possible only with special tools and special equipment.
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