What does AC mean in the air conditioning?

[StJoanna]

AC in the air conditioning refers to the air conditioning switch. Here is some information about AC: 1. Car air conditioning is divided into cold air conditioning and hot air conditioning. Hot air conditioning actually does not require turning on the air conditioning; you only need to turn on the blower to utilize the engine's heat for warming. On the other hand, cold air conditioning requires turning on the AC switch to activate the air conditioning compressor for cooling and producing cold air. Therefore, the AC switch is the start switch for cold air conditioning. 2. Mid-to-high-end car models often have an additional AUTO button, which stands for automatic air conditioning. When the AUTO button is turned on, the vehicle's computer automatically detects whether warm or cold air is needed through temperature sensors. For lazy people or beginners, automatic air conditioning can save a lot of setup trouble, making it convenient and quick to use.