How to Turn on the Car Air Conditioner's External Circulation?

[SanDylan]

To activate the car air conditioner's external circulation, simply press the external circulation button on the central control panel. The button is marked with an arrow pointing from outside the vehicle's front windshield to the inside. The working principle of the car's external circulation is: a fan draws outside air into the car and expels the inside air out through the fan, achieving ventilation without opening the windows. Situations for using the car's external circulation include: 1. During high-speed driving, to prevent a decrease in oxygen levels inside the car; 2. Shortly after entering the car, to introduce fresh air; 3. During the break-in period of a new car, to maintain air exchange between the inside and outside, helping to dissipate harmful gases inside the car.