What to Do If the Car Doesn't Have an External Circulation Button?
1 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.
