Failures of the electromagnetic clutch may be indicated by the absence of a click when the air conditioner is turned on. The reason is the appearance of a large gap between the pressure plate and the pulley, arising from the development of the coupling or in the case of melting of the coil from overheating of the compressor.The noise during operation of the air conditioner, as well as when it is turned off, indicates that replacement of shaft bearings or drive pulley is required. With such sounds, it is worth checking to see if the belt is too tight. In the case when, when the electromagnetic clutch is disconnected and the belt is loosened, the compressor pulley still manually rotates or wedges, then the problem is in the bearing, but if it rotates easily, then most likely the shaft bearing will buzz. Leaks of are clearly visible in the light of a UV lamp, but first you need to add fluorescent paint to the refrigerant.
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