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Will the car battery die if the air conditioner is left on while parked?

1 Answers

Heather

07/29/25 5:38pm

Leaving the air conditioner on for an extended period while the car is parked can drain the battery. Here are some key points about car air conditioning: 1. Reason for battery drain: The air conditioning compressor is powered by the engine. When the engine is off, the blower that circulates air is powered by the battery. Excessive use of the blower can lead to long-term battery depletion. 2. Best practices for using car air conditioning: On hot summer days, it's recommended to first open the windows for ventilation, then turn on the air conditioner in external circulation mode to expel hot air from the car. Once the car is moving and the interior temperature has dropped, you can close the windows and switch to internal circulation for the quickest cooling effect.

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