What does 'auto' on the air conditioner mean?

[VonJameson]

'Auto' on the air conditioner refers to the automatic function, which automatically adjusts the temperature and wind speed of the air vents to regulate the temperature inside the car. The functions of the air conditioner include: 1. Achieving a cooling effect through the continuous cycle of refrigerant; 2. Removing dust, odors, smoke, and toxic gases from the car's air, making the air inside the car fresher, and humidifying the air to increase its relative humidity; 3. Using the engine coolant, waste heat, or heat generated by a burner as a heat source, which is then heated by the heater and blown into the car's air or outside air by the blower, raising the temperature of the air vents for heating purposes; 4. Drawing in fresh external air for ventilation and air exchange, which also helps prevent window fogging.