Should the AC be turned on for heating?

[WillowDella]

Car heating does not require turning on the AC. The AC button activates the compressor, which is used for cooling. Warm air comes from the engine radiator, and when the heating is turned on, the air duct connects to the engine radiator compartment, at which point the AC cooling duct should be closed. Below is a brief introduction to the car heating system: 1. Function: The car heating system is designed for heating, defrosting, and adjusting temperature and humidity. 2. Working principle: Cold air is blown over the surface of the heat exchanger, absorbing its heat and directing it into the car, thereby increasing the interior temperature. Additional information: The main function of the car air conditioning heating system is to adjust the air to a comfortable temperature for passengers together with the evaporator, providing pure heating in winter to improve the interior environment temperature.