What does the AC button on the car mean?

[EverlyRose]

The AC button on the car refers to the air conditioning system. Pressing the AC button activates the air conditioning to adjust the temperature according to the set level, while turning it off only allows the fan to operate. The car air conditioning system, commonly known as car AC, is used to regulate and control the temperature, humidity, air cleanliness, and airflow inside the car cabin to maintain a stable and comfortable environment for passengers, reducing travel fatigue. Based on performance, car air conditioning systems can be divided into two types: single-function type (where the cooling, heating, and ventilation systems are installed separately and operate independently without interference, typically used in large buses and trucks) and combined heating-cooling type (where cooling, heating, and ventilation share the same blower and air ducts, controlled via the same panel). During operation, they can be further categorized into combination-type (where heating and cooling work separately) and mixed temperature-control type (where heating and cooling can work simultaneously).