Why is the LG refrigerator humming?

Throttle capillary tube clogging


Sometimes users are faced with the situation when the refrigerator cracks when working. This crackling is nothing but the result of a large pressure drop in the joints and transitions from a large to a small radius. The refrigerant that circulates in the system makes such loud noises. There is always a characteristic noise, but at some point, it becomes too loud. This condition indicates a blockage in the system.


Theoretically, it should not form, only in the filter. In fact, this element retains only large particles. Everything small successfully drives through itself, so a clog is formed at the place of transition from a larger diameter of pipes to a smaller one. This occurs because of the existing cut of the tube, for which the small fractions cling and accumulate.


This defect can be eliminated by performing the following steps:


– It is necessary to drain all the refrigerant from the system.

– Blow out the system with nitrogen, because there is always moisture in the compressed air.

– Remove the filter drier.

– Re-blow and install a new filter.

– Fill the system with freon according to all the rules for this procedure.


If the refrigerator is still noisy, it is necessary to open the connections at the transition points to see the problem and re-solder the system parts.


Malfunction of the electrical system


When you turn on your refrigerator makes a noise, and what to do, you do not know what. First, try to determine what exactly and at what point the sound occurs. If it is a humming noise, and when you pay attention to the light bulb there is a voltage sag, it indicates a problem in the power grid.


The compressor, judging by its dimensions, is a very powerful asynchronous motor. Accordingly, it requires a lot of power to start up steadily, which is insufficient at the moment. The motor tries to enter the operating mode, but it fails, because the exit point is high on the characteristic. As a result, the power consumption is going on, but there is no exit to the mode. This process is accompanied by the hum and gradual heating.


It is possible to eliminate such sounds of refrigerator operation only by installing the network stabilizer. As a rule, such problems are not observed in the apartment sector. Sags and surges of power occur in a private or holiday village when the substation can not cope with the load and operates in the mode of the strongest overload.


Fan malfunctions


In refrigerators with “Frost” technology very often problems occur exactly with the fan. This is due to the fact that the motor works very often, and it uses bearing grease for the normal rotation of the impeller. Over time, it loses its lubricating properties, so it begins to hum, crackle and make other sounds. With prolonged operation in this mode, it may soon jam.


If you began to hear uncharacteristic noise for normal operation, it is necessary to act promptly. Some models of fans in refrigerators can be disassembled for lubrication of bearings, but more often it is impossible to do it. Therefore, the solution is to replace the motor. It is much easier to lubricate a still-running motor, which can be done with a syringe and silicone lubricants.


Transport bolts and compressor mounts


Often inexperienced owners have situations when a new refrigerator makes a loud noise for unknown reasons immediately after turning on. It can occur due to one reason – the transport bolts and compressor fasteners have not been unscrewed. Every manufacturer clearly prescribes in the instruction in the most visible place that the refrigerator should stand for some time before first switching on immediately after transportation. The screws fixing the compressor and fan are unscrewed.


If these uncomplicated actions are not performed, the refrigerator begins to make sounds similar to different humming. The fact is that for the compressor and fan, vibration is normal during operation. Given that the elements are firmly attached to the body of the equipment, it begins to be transmitted directly to the large parts, many times intensifying.


Fixing the problem of loud compressor operation is done by unscrewing the shipping bolts. This will require a 10-wrench or screwdriver, depending on the model. Many of the bolts have large plastic holders.


The best solution is to call a master at home or contact the service center. This calls us, and we will give you the best repair HOME APPLIANCE SERVICE CENTER. With our superior performance, absolute accuracy, extensive knowledge and experience, fast and efficient service, friendly attitude, free maintenance consultation, and after-service warranty, we are proud to say that we are the leading Repair Service Provider in San Diego. Customer satisfaction is our top priority, and we are always committed to what we do. We are open 24/7 a week, on weekends and holidays. Our engineers will come to you 15 minutes after your call in urgent cases. Give us a call, and HOME APPLIANCE SERVICE CENTER will solve any problem.


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