What does the AC button on a car mean?

[Oliveira]

The AC button on a car refers to the air conditioning cooling switch. Pressing the AC button activates the air conditioning to adjust the temperature according to the set level, during which the air conditioning compressor starts, increasing the engine load. The functions of the air conditioning system include: 1. Regulating the temperature, humidity, airflow, and cleanliness of the air inside the vehicle; 2. Filtering the air inside the car, with a sterilizing effect; 3. Clearing fog from the windows. Precautions for using car air conditioning: 1. Turn off the AC during startup and rapid acceleration; 2. Avoid setting the air conditioning temperature too low—a difference of 5 to 6 degrees between the inside and outside temperature is sufficient; 3. Based on the principle that cold air sinks and hot air rises, when controlling the air vents, aim them upward when cooling and downward when heating.