Why does the car still blow hot air when the AC is turned on?

[OPeter]

Reasons why the car still blows hot air when the AC is turned on: Incorrect use of zoned air conditioning. More information about zoned air conditioning is as follows: 1. Zoned air conditioning refers to the ability to independently adjust the temperature in different areas within a car cabin. For example, dual-zone air conditioning means the temperature on the left and right sides of the car can be adjusted independently; four-zone air conditioning means the temperature in the front and rear rows, as well as the left and right sides, can be adjusted independently, meaning there are four zones where the temperature can be independently controlled. 2. Automatic zoned air conditioning consists of four parts: first, the sensor part, which is responsible for temperature information feedback; second, the system's 'control center,' which is the air conditioner control unit ECU; third, the control components; and fourth, the self-check and alarm part.