How Long Can You Run the Air Conditioning After the Car Is Turned Off?

[McErin]

You can run the air conditioning for a short period after the car is turned off. However, there is no cooling function, and prolonged use can easily drain the battery. Therefore, it is not recommended to keep the air conditioning on for extended periods while the engine is off. If you need ventilation, switch to the external circulation mode to allow fresh air to enter the cabin. Additional notes on common misconceptions about car air conditioning usage: 1. Smoking in the car with the air conditioning on: Some people smoke in the car while parked or waiting, which is harmful to health because the closed doors and windows trap the smoke, irritating the eyes and respiratory system. If you must smoke, adjust the air conditioning ventilation control to the "exhaust" position. 2. Always using the internal circulation mode: Some drivers keep the air conditioning in internal circulation mode, which is not ideal. The air conditioning mode should be adjusted based on temperature and environment. Internal circulation can be used but not for long periods. It's best to start with external circulation when turning on the air conditioning and switch to internal circulation after the temperature drops. 3. Setting the air conditioning temperature arbitrarily: Drivers often set the temperature very low for comfort, but prolonged exposure to low temperatures can disrupt the body's endocrine system and cause illness. Setting the temperature below 20°C can lead to various discomforts.