The little-known car button that helps your AC cool down faster in a heatwave

The little-known car button that helps your AC cool down faster in a heatwave

The recirculation button — dashboard icon showing a car with a looping arrow — blocks outside air intake, letting AC recool already-chilled cabin air instead of fighting hot exterior air. On humid or rainy days, disable it: trapped moisture causes windscreen fogging, and most modern cars auto-deactivate it when defrost mode is selected.