Does Your Outdoor Air Conditioning Make Noise? Let’s See Its Possible Causes

Due to the special characteristics of less power consumption air conditioner units compared to other types of household appliances, they are very susceptible to the appearance of noise and vibrations in the outdoor unit. This is due to the expansions produced by the temperature differences that are reached in the outdoor unit, as well as by the arrangement inside of various mobile components such as the compressor, motor, etc.

Let’s see now why noise can occur in the Outdoor air conditioning and how to fix them.

Noise in outdoor air conditioning

The outdoor unit is much more susceptible to generateannoying noise since it has more mobile parts that can cause discomforts. These units are generally made of metal, which is another main reason for generating noise than indoor units, usually made of plastic.

Noise in the outdoor unit fan

The fan is one of the usual components where noise is generated, the most common causes are the following:

  1. Loose outdoor fan blades

Noise on the outdoor unit from loosening the nut of the outdoor fan. The outer fan blades detach from the motor shaft of the external fan, slide forward, and colloid with the fan’s protective grille. This usually happens because the nut that fixes these blades to the fan shaft becomes loose and fall, leaving freedom for the blades to move forward. To solve this, look for the nut that has fallen (it usually ends up falling inside the machine) or put a new one, if you do not want to open the outdoor unit.

  1. Compressor noise

Noise in the compressor is another “typical” problem in the air conditioning unit. With the appearance of inverter technology and new compressors, this noise has been reduced significantly by air conditioner manufacturer companies in India. A compressor making more noise than usual is somewhat complicated unless you are quite used to the “normal” sound. The solution is none other than to replace the compressor since the compressors of current domestic units have no possibility of repair.

Another possibility for the compressor to make noise and vibrations is that the rubbers or silentblocks where the compressor is “sitting” have become very degraded and it is touching the base of the machine. In this case you can put some type of plug/rubber base between the compressor and the base of the outdoor unit to solve these vibrations and noises or call a technician to replace them, something that is more recommended.

  1. Metal noise in the outdoor unit

The metallic noises can be differentiated into two categories, those produced internally in the external air conditioning or that produced on the external part of it or in its “casing”.

  • Internal noise

This internal noise is usually caused by the collision between two copper pipes or between a copper pipe and some sheet metal of the outdoor unit housing. To solve this problem, one has to open the machine and access the compressor region where copper wires are installed. Look for the pipes that are colliding with each other and once located, separate one from the other or place some type of rubber plug between them so that they do not vibrate.

  • External noise

The external noise become quite complicated to solve at some occasions. These noises are produced by the collision of two sheets of the housing of the air conditioning itselfand although sometimes it is as easy as tightening a screw that has been loosened. In others it is an ordeal because whatever you do the noise goes from one place and appears in another and thus to infinity. To locate it you will have to turn on the unit and review where the noise appears, in many cases the noise appears in the grille at the rear of the machine, it is usually a gridded grid that protects the external heat exchanger. The best solution is to remove the fence.