Is the external circulation light on or off?
1 Answers
External circulation is indicated by the light being off. The internal and external circulation in a car refer to: Internal circulation closes the airflow passage between the inside and outside of the vehicle. When the fan is turned on, there is no airflow circulation, and the air drawn in by the fan comes only from inside the car, creating an internal airflow cycle. External circulation uses the fan to draw outside air into the car. The air blown by the fan comes from outside, and even if the fan is not turned on, airflow is still drawn into the car while driving, replenishing the interior with fresh air. The symbols for internal and external circulation are: 1. The internal circulation symbol is a small car shape with a rotating arrow inside; 2. The external circulation symbol is an arrow that goes from the front windshield into the car.