Is AC switch off turning it on or off?

[VonLeila]

The AC button in a car's air conditioning system controls the compressor. AC-OFF means the compressor is turned off, while AC-ON means it's turned on. Below are the reasons why a car's air conditioning compressor may not work: 1. Circuit system failure. Short circuits or open circuits in the wiring can disrupt the power supply path, preventing the electromagnetic clutch from properly controlling the compressor's operation. 2. Lack of refrigerant. Refrigerant and lubricating oil are mutually soluble and circulate back to the compressor through the system. If the Freon in the refrigerant is depleted, it can lead to insufficient oil return, reducing lubrication and causing the compressor to seize or fail. 3. Mechanical wear of the compressor. Prolonged high-speed operation under load can cause premature mechanical wear of compressor components, rendering it inoperable. 4. Over-tightened drive belt. An excessively tight drive belt can directly cause the compressor to seize and stop running, so it's important to regularly check the belt's tension. Conversely, a belt that's too loose can cause the compressor's power transmission to slip, resulting in intermittent cooling and reduced efficiency.