What is the function of the car AC?

[DelEloise]

The AC button is the air conditioning cooling switch. The functions of the AC button are as follows: 1. Pressing the AC button activates the air conditioning cooling compressor, which blows out cold air. During hot summer weather, it is necessary to turn on the A/C button, at which point the car's compressor will start working and blow cold air. Car air conditioning heating has nothing to do with the compressor; the heat source for heating is not obtained from the air conditioning itself (meaning there will be warm air even without pressing the A/C button) but is provided by the car's radiator, relying on the heat generated by the engine. The heat is then blown into the car by the blower, with almost no energy consumption, so there is no need to turn on the A/C button. 2. When using the air conditioning for heating in winter, the A/C light being on does not help with heating at all. Instead, it causes unnecessary power loss due to the operation of the compressor. Therefore, when using the air conditioning for heating in northern winters, the A/C can be completely turned off without any impact on the heating function.