The dashboard button showing a car with a circular arrow is the air recirculation control, which reuses the air already inside the cabin instead of drawing new air from outside.
Using this setting can help your vehicle cool more effectively for a time and can also briefly reduce outside odors from entering the cabin, which some drivers find useful in certain traffic or environmental conditions.
However, this feature is not meant to stay on all the time. If the cabin begins to feel stuffy or if the windows start to fog, the button should be switched off so the system can bring in fresh air again. For the best results in different weather or visibility situations, follow your vehicle’s specific defogging and climate control instructions in the owner’s manual.
