What does AC mean in a vehicle?

[StManuel]

Vehicle AC is the abbreviation for Aircondition, meaning air conditioning. The AC button serves as the switch for the car's air conditioning system. Overview of AC: The A/C switch is essentially the air conditioning switch, controlling whether the compressor operates. Inside the compressor, there is an electromagnetically controlled clutch. When the coil is energized, the electromagnetic clutch engages, and the compressor works. Otherwise, the compressor's pulley simply spins without the compressor functioning. If the button's light is on, it indicates the air conditioning is operating. In winter, when using the engine's heat, this function is unnecessary, but in summer, it is required for cooling. Precautions: Some drivers have the bad habit of not turning off the air conditioning before parking and shutting off the engine. This can cause the air conditioning to start automatically the next time the engine is started, increasing the engine's load and raising fuel consumption during startup. Therefore, it is recommended to turn off the air conditioning a few minutes before parking, which not only protects the engine but also saves fuel.