What to Do If the Car Doesn't Have an External Circulation Button?
2 Answers
Cars not having an external circulation button is a normal phenomenon. Nowadays, many cars only have an internal circulation button. When the internal circulation is turned off, the car automatically defaults to the external circulation being on, so there's no need to worry. Another scenario is that car manufacturers have integrated both internal and external circulation functions into the internal circulation button, requiring just an additional press to switch. Below is an extended introduction: 1. Introduction to external circulation: External circulation refers to outside air being blown into the car, keeping the interior air fresh and reducing motion sickness caused by poor air circulation. 2. The relationship between external and internal circulation: Internal circulation removes hot air from inside the car. To activate external circulation, one should first locate the internal circulation button; typically, the external circulation button is nearby. If there isn't a separate external circulation button, observe the indicator light on the button—when the internal circulation button's light is off, the external circulation is automatically activated. 3. Do not abuse external circulation: The external circulation function should not be misused. For example, when waiting at traffic lights, the vehicle ahead may emit exhaust fumes. Turning on external circulation in such situations can worsen air pollution inside the car.
I've been driving for decades and have come across many cars without an external circulation button—don't panic. Usually, the air conditioning system is integrated into the central control screen. After starting the vehicle, press the AUTO button, and the automatic mode will handle the airflow and circulation. But if you need to manually switch to external circulation, tap the screen to enter the air conditioning menu and look for the circulation icon or mode-switching option, which might be a car icon with an arrow. External circulation is especially useful in key situations, like preventing fogging on rainy days or refreshing the air on highways. The absence of a dedicated button is meant to simplify the panel. If you really can't find it, check the owner's manual—it usually has diagrams to guide you. Or, ask the technicians at the 4S shop during your next maintenance visit; they can demonstrate it on the spot. Avoid randomly pressing buttons, as it could damage the system. Ensuring proper air circulation inside and outside the car helps prevent drowsiness on long drives.
