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Is It Serious If the Air Conditioner Is Left On After Exiting the Car?

1 Answers

OCatherine

07/30/25 9:50am

After the engine is turned off, leaving the air conditioner on will not have any impact. The car's air conditioner will automatically shut off once the engine is turned off because it is powered by the engine. When the engine stops, the air conditioner ceases to function. Tips for using the car air conditioner: 1. Turn it off before shutting down the engine: It is best to turn off the A/C button one or two minutes before parking and turning off the engine. This allows the fan to dry out any moisture in the air vents and ducts, preventing bacterial growth inside the air conditioner and reducing the chance of odors. 2. Turn on the air conditioner after starting: If the air conditioner is left on when the engine is turned off, the next time the vehicle is started, the engine will have to bear the load of the air conditioner. Therefore, the best practice is to wait two or three minutes after starting the vehicle, allowing the engine to be fully lubricated, before using the air conditioner.

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