6 frequent causes of the refrigerator humming

HomeBlog6 frequent causes of the refrigerator humming
5NovNCR 1

Fan malfunction

In refrigerators with “Frost” technology, it is the fan that often has problems. 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 the only reason – the transport bolts and compressor mounts 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.

Problem with the shock absorbers

Also, the refrigerator begins to work noisily after a certain period of service due to wear and tear in the shock absorbers. Most often these are rubber rings with a spring that absorbs the vibration created by the motors. There are such dampers under the fan and compressor. Over time, the rubber pads become stiff and the springs sometimes break. This breakage is corrected as follows:

1. It is necessary to disconnect the refrigerator from the mains and turn it around to access the compressor.
2. With the help of a wrench or a 10 head unscrew the nuts fixing shock absorbers.
3. Remove the old shock absorbers and install the new ones in their place.
4. Bolt the nuts in place. Don’t forget to lubricate the threads with graphite or another grease, so you can unscrew them another time.

Similar manipulations are performed with the fan. All actions must be performed carefully so as not to tear the threaded connections.

Refrigerant overdose

If the refrigerator makes a lot of noise after its charges, the cause of the loud sounds in its work can be an overdose of freon. During its circulation, compression, and expansion, pressure is created. If the refrigerant is more than necessary, it grows significantly, and because of this, connections can burst. An excessive increase in pressure is accompanied by an amplified sound, usually a crackling sound.

To eliminate the defect, when the refrigerator makes a loud noise, it is necessary to drain some of the freon, controlling its pressure in the system. Without specialized equipment can not do without, it can be rented. It is enough to connect only a blue manometer to control the pressure in the system. Connection should be made through the Schrader valve.

Clogged piping.

If you began to feel a strong hum and vibration, which comes from the radiator or pipes. You may also feel the crackling of the plastic due to the pipes hitting it. This may indicate a clog in the pipeline, resulting from the accumulation of small fractions in one of the places of transition from small to larger diameter. To fix this defect it is necessary to purge the system with nitrogen and then re-fill it with freon. It will require special equipment, which can be rented.

Faults in the elements of the electrical circuit
Sometimes the refrigerator is noisy due to a malfunction in the electrical circuits. In particular, crackling with hissing occurs as a result of bloating of electrolytic capacitors, which, in turn, occurs when the power supply fails. It can also be a trivial element defect. To fix the problem, it is necessary to repair the power board or the board. After that, mandatory diagnostics are required.

The psychological factor

The abnormal operating noise of the refrigerator is a reason to perform a comprehensive inspection of the device. It should be performed according to the nature of the sound because its source can be many elements. For example, the refrigerator thermostat is defective, due to which it is constantly gaining cold because there is no response signal to the compressor shutdown. In the process, there is a characteristic sound of freon circulation, gradually intensifying. It is important not to basically react to such defects, but to think rationally and act correctly.

If you can’t eliminate the cause of the loud noises when your refrigerator is running on your own, you can always turn to the skilled technicians at North Country Appliance Repair Company. We will quickly fix the breakdown and provide a warranty on our services.

Do you want the best Refrigerator Repair in San Diego County? Call us! We are a leading service provider thanks to the excellent quality of work, that our specialists provide. We use only high-quality parts, recommended by the refrigerator producer. Forget about any discomfort, with our friendly and professional team. With us, you get the highest quality service and the friendliest approach. Our highly qualified workers will do everything to make you forget about any problems with your refrigerator. Now, those are our issues.

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(442) 291-2244

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