What does the AC switch in a car mean?

[StJackson]

Car AC switch is the cooling on/off button for the vehicle's air conditioning system. When pressed, the air conditioning compressor will operate. Below is relevant information about the automotive air conditioning system: 1. After turning on the AC switch, the vehicle's computer receives the signal from the AC switch, and then sends a signal to the air conditioning compressor. 2. Press the AC button and rotate the temperature selection switch to the blue section, then cold air will blow out from the car's air conditioning. 3. Essentially, the AC button controls whether the compressor operates. Inside the compressor, there is an electromagnetically controlled clutch. When its coil is energized, the electromagnetic clutch engages and the compressor works. Otherwise, the compressor's pulley just spins idly without the compressor actually operating.