Should You Turn Off the Air Conditioner Before Turning Off the Car?

1 Answers
RyderLee
07/25/25 4:54am
You should turn off the air conditioner before turning off the car. For early carburetor-equipped vehicles, leaving the air conditioner on can increase additional load and power consumption during startup, potentially causing malfunctions. Summer car air conditioning tips: 1. Do not immediately use the recirculation mode upon entering the car: After the car has been exposed to the sun, the instinctive reaction is to turn on the air conditioner as quickly as possible to cool down. However, in reality, the interior temperature of a sun-exposed car is extremely high, and the relatively enclosed space traps heat and exhaust gases, leading to oxygen deprivation inside the car. Closing the windows and turning on the air conditioner immediately can result in high temperatures and oxygen deprivation, increasing the risk of heatstroke for elderly and young passengers. 2. The correct method: First, turn on the fan, open the windows, and repeatedly open and close the doors to expel the hot air inside the car with strong airflow. Then, switch to recirculation mode, and periodically alternate between recirculation and fresh air modes (for manual air conditioning). For automatic air conditioning, set the desired temperature and switch to AUTO mode (at this point, the vent temperature, fan speed, airflow direction, and recirculation/fresh air modes are all automatically controlled by the computer, enhancing passenger comfort). 3. Never sleep in the car with the air conditioner running: Tragedies occur every year due to people sleeping in cars with the air conditioner on. When the car is idling, the fuel does not burn completely, producing large amounts of carbon monoxide in the exhaust. This gas can enter the car through air circulation, leading to carbon monoxide poisoning. If you must sleep in the car, try to turn off the engine and open the windows, ensuring the windows are slightly open, park facing the wind, and set the air conditioner to fresh air mode to reduce the risk of accidents.
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