How to open the outer loop of BYD F3

BYD f3 external circulation open: the switch is located on the air conditioner temperature switch, the icon button with the arrow entering the car from outside the car is the button to open the external circulation, press this button to open the external circulation. The working principle of the external circulation is to use the fan to pump the air outside the car into the car, which means that the air passages between the outside and the inside of the car are circulated, and the wind blown by the fan comes from outside the car.

That is to say, even if the fan is not turned on, there will still be airflow entering the car during driving to replenish fresh air. Sometimes you will feel that there is still wind after turning off the fan, which is because the vehicle is set with external circulation. The outer circulation allows people in the car to breathe fresh air outside the car, so when driving at high speed, the air inside the car will become turbid after a long time. If you can’t open the windows, you can use the outer circulation to let the fresh air from outside enter the car. When the heater is hot in winter, you can turn off the fan and turn on the external circulation to maintain the temperature inside the car, and at the same time, there will be fresh air to breathe, which will make you feel more comfortable.Note: When turning on the air conditioner for cooling or heating, you can first turn on the internal circulation to quickly make the temperature in the car warm or cool, but when the temperature is stable, you should switch to the external circulation for ventilation