Is the Car Air Conditioning Circulation Light On Indicating Internal or External Circulation?
2 Answers
When the light is off, it indicates external circulation; when the light is on, it indicates internal circulation. Below are the relevant explanations: 1. External Circulation: In the case of summer heat exposure, first turn on the external circulation to expel the hot air inside the car, which can reduce the burden on the air conditioning; when smoking, turn on the external circulation to allow harmful gases to be expelled as quickly as possible, avoiding health impacts on passengers; after purchasing a new car, use the external circulation first to encourage the early release of harmful gases inside the vehicle. 2. Internal Circulation: During traffic jams, switch to internal circulation to prevent exhaust fumes from entering the car; in most short-distance driving situations, using internal circulation will be more fuel-efficient. Additionally, during long-distance highway driving, periodically switch to external circulation to maintain fresh air inside the car and prevent driver fatigue and decreased attention due to lack of oxygen, which could lead to accidents.
After driving for a long time, I noticed that when the small light on the car's air conditioning is on, it means the recirculation mode is activated. Simply put, the air inside the car doesn't draw from outside but circulates internally, which is suitable for reducing noise on highways or minimizing pollution intake in cities. I often turn it on during pollen season to protect myself from sneezing. However, you shouldn't leave it on all the time, as the air can become stuffy, so occasionally switch to fresh air mode to let in fresh air for comfort. In cars with automatic air conditioning, pressing the button to light it up switches the mode, and you can adjust more detailed settings from the central control screen. Remember, using the recirculation and fresh air modes wisely ensures a better driving experience. Air quality during long drives shouldn't be overlooked—I've personally experienced this many times.
