Why My Mitsubishi Aircon Is Making Noise? This question is beginning to worry many happy owners of such climate technology, especially after several years of using it. It is rather difficult to answer this question since there are a lot of reasons for the increased air-con noise. Only one thing can be said unequivocally: it is necessary to solve this problem without delay to prevent severe damage and failure of this expensive climate control equipment.
The primary noise generators in Mitsubishi air conditioners are naturally moving elements such as fans and a motor-compressor. They account for the main percentage of noise. A little noise is added by the refrigerant moving through the system, but if the installation of the air conditioners is technically correct and the unit itself is working, this noise is inaudible.
For it to serve you for a long time and reliably, the air-con needs to be serviced. This must be done before the start of the heating season and before the beginning of the cooling season. A sharp increase in sound level, as well as the appearance of atypical noises, should alert the owner. This is a sure sign of the need for immediate diagnosis of the Mitsubishi aircon.
Why My Mitsubishi Aircon Is Making Noise?
The noise increase in the indoor unit may have several reasons:
Bearing wear
The noise of a split system fan is mainly related to bearing wear. Besides, the fan blades can touch the elements of the block (structure). Such moments arise when working with inexpensive models. This is due to the low quality of plastic, which eventually deforms and warps.
Hissing when turned on.
Such sounds are caused by problems transporting the refrigerant through the system. The reason is a narrowing of the section, a tube wrap, or clogging of their cavities (for example, vacuuming of freon guides might have been carried out poorly). Over time, this can lead to overheating and failure of the compressor.
Increased vibration.
As a rule, the reason is the imbalance of the fan impeller. For example, a balancing weight could have jumped off. In the vast majority of cases, the imbalance is caused by severe impeller contamination that occurs unevenly over the entire length. The solution will be the systematic maintenance of the Mitsubishi aircon and its timely cleaning.
Intermittent vibration.
The problem may be caused by the poor fitting of individual housing elements. Non-functional elements (overlays, grilles) that are installed “for beauty” often vibrate. The solution is either the removal of “extra” elements or the installation of additional seals.
Selection of elements (brackets, bolts), and the quality of installation work.
The external unit is noisier than the internal unit. To avoid problems with neighbors, first of all, you should correctly choose the place where the installation of a Mitsubishi aircon should be carried out. The noise level is affected by the correct selection of elements (brackets, bolts), and the quality of installation work. Often, the increased noise of the external unit is caused by the absence of rubber anti-vibration pads between the legs of the air conditioner and the bracket. As a result, the housing on the bracket vibrates.
Clogging
One of the main reasons for the increase in noise in the outdoor unit is its clogging. Over time, the block becomes clogged with dust, poplar fluff, leaves, scraps of paper, and insects, which, in general, impairs heat transfer. Untimely maintenance of the Mitsubishi aircon leads to accelerated wear of the compressor, and, as a result, an increase in noise.
Also, if the installation of the air conditioner was carried out without the installation of additional protective equipment – visors and fences, then, due to the deformation of the case, the fan begins to touch its elements. The growth of vibration and the appearance of extraneous noise is a sure sign of the unstable operation of climate control equipment. Timely maintenance of a Mitsubishi aircon will significantly extend its service life.
If abnormal sounds from your Mitsubishi aircon appear, contact your service organization. By the nature of the sound, one can independently determine the cause and then decide on the best methods of eliminating it. It is also prudent to contact a specialist if your Mitsubishi aircon is noisy.