What Does the Air Recirculation Button in Your Car Actually Do? (And When to Use It!)

That circular-arrow button is your car’s air recirculation control. It reuses cabin air to cool faster, block exhaust and odors, and help with allergies. But leaving it on too long can cause stale air and foggy windows—so switch back to fresh air in rain, cold weather, or on long drives for a safer, more comfortable ride.