
To activate the external air circulation in a vehicle, you can directly press the button on the central control panel. The symbol for the external circulation button is an arrow pointing from the outside of the front windshield into the car, while the internal circulation button symbol is an arrow making a circle inside the car. Generally, external circulation can be turned on when driving on highways, while internal circulation is suitable for city roads. The external air circulation draws outside air into the car, similar to opening the window for ventilation, but it filters out impurities and harmful gases from the external air, preventing them from entering the cabin and polluting the environment. Internal circulation, on the other hand, recirculates the air inside the cabin. In harsh conditions such as traffic jams or sandstorms, internal circulation helps maintain airflow inside the car, prevents stuffiness, and blocks external pollutants and harmful gases from entering.

Turning on the external air circulation is actually super easy—just press the button with an arrow pointing into the car in the air conditioning control area. The icon is usually a circulation symbol or a fresh air sign. When I drive my friend's car, I always do it this way: first turn off the internal circulation, then press the external circulation button to let fresh air in. It’s especially comfortable on long drives and prevents dizziness. The button location varies by car model—some are near the steering wheel, others on the center console—but it’s not hard to find. Using external circulation also helps defog windows. On rainy days, if the rear window fogs up quickly, just press the button and check if the windows are closed for better results. For daily use, avoid keeping it on too long to prevent dust buildup. Setting the AC to auto mode allows it to intelligently switch between internal and external circulation, while manual mode offers more control. Anyway, the operation is simple—just try it and you’ll get the hang of it.

I often use the vehicle's external air circulation function. Generally, you can find the internal/external air circulation switch on the air conditioning panel and simply press it. The icon is usually a car-shaped arrow pointing inward. From my experience, this feature is extremely practical, especially on highways or during rainy days. Turning on external circulation allows fresh air to enter, preventing oxygen deprivation inside the car and helping to defog the windows for clear visibility. New drivers might struggle to identify the button, so I recommend checking the manual to confirm its location. Some cars come with an automatic mode, eliminating the need for frequent manual adjustments. Be cautious not to activate it in heavily polluted areas to avoid letting unpleasant odors in. Overall, this function is quite important, and you'll get the hang of it after using it a few times.

Turning on the fresh air mode is a routine for me. After getting in the car, I check the climate control panel where there's a button with an arrow pointing into the car interior. Pressing it allows outside air to flow in. I prefer keeping it on for better ventilation, which feels more natural and comfortable - especially when driving with kids, as fresh air improves everyone's mood. It's simple to operate; if unsure, just check the dashboard prompts. A key benefit is preventing window fogging - opening it slightly on rainy days quickly clears condensation. Remember it works better when recirculation mode is off. Performance may vary between vehicles, so get familiar with your own car's system.

How to turn on the external air circulation? Look for the circulation button in the air conditioning area, the icon is an arrow pointing into the car cabin, just press it. The principle is simple, the system switches the air source to draw from outside into the vehicle. When operating, I prioritize turning off the internal circulation button to prevent recirculation of interior air, especially during long drives to avoid stuffiness. Designs vary slightly between car models, but most buttons are prominently placed and easy to find. After activation, it helps with defogging and ventilation, quite convenient to use, but be cautious when air quality is poor.

Turning on the external air circulation is straightforward: Get in the car and locate the air conditioning control panel. Identify the button with an arrow-in icon, usually labeled as 'circulation' or 'fresh air' or depicted with a corresponding symbol, then simply press it. I've developed a habit of using it while driving to breathe in some outside air, and it's quite effective at preventing window fogging. The button's position varies by car model, so it's advisable to familiarize yourself with it before starting your drive. The operation is safe and not complicated.


