Should You Use Recirculation or Fresh Air Mode When There's an Odor in the Car?

[LeGavin]

When there's an odor in the car, you should use the fresh air mode. Here are the relevant explanations: 1. Fresh air mode: This mode uses the fan to draw outside air into the car, creating a flow between the exterior and interior air passages. The air blown by the fan comes from outside the vehicle. Even if the fan is turned off, air will still be drawn into the car while driving, replenishing the interior with fresh air. Sometimes you may feel air coming in even when the fan is off—this is because the fresh air mode is activated. However, when driving in congested urban areas, the car may fill with exhaust fumes due to the use of fresh air mode. 2. Recirculation mode: This mode closes the airflow passage between the inside and outside of the car. Without the fan, there is no airflow circulation, and when the fan is on, the air drawn in comes only from inside the car, creating internal airflow circulation. Recirculation mode is mainly used to effectively block external dust and harmful gases from entering the car, such as when driving through smoke, dust, areas with strong odors, or in heavy traffic, preventing harmful exhaust emissions from the vehicle ahead from entering.