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What Happens If You Forget to Turn Off the Air Conditioner After the Car Is Turned Off?

1 Answers
McCollin
07/30/25 8:46am
Turning off the air conditioner before parking and shutting down the engine can help avoid negative impacts on the battery and the air conditioner's lifespan. It is best to turn off the air conditioner when preparing to park, allowing the remaining heat to dry the moisture in the evaporator box and eliminate the temperature difference with the outside environment. This relatively reduces air conditioner odors and maintains the relative dryness of the air conditioning system. The effects of not turning off the air conditioner when the car is turned off are: It can lead to odors when the air conditioner is turned on, which can only be resolved by disassembling and cleaning the evaporator box and air conditioning ducts. During the next startup, the air conditioner will run simultaneously with the compressor, increasing the load on the motor. When the air conditioner is running in summer, the system is in a cooling state, forming surface moisture that is blown into the air conditioning ducts by the air conditioner, resulting in high humidity inside the ducts. This promotes the growth of mold, leading to air conditioner odors. Precautions for using car air conditioners: Not using the air conditioner all winter: In some regions with mild winters, some car owners do not use the air conditioner at all. However, prolonged disuse can cause rubber seals to age, and the lubricating oil on internal components may dry out. Regularly starting the air conditioner ensures that all parts receive lubrication and remain in good condition. Adjusting air vent directions randomly: Some car owners do not pay attention to adjusting the direction of the air vents, which affects the optimal performance of the air conditioner. Based on the principle that cold air sinks and warm air rises, the correct approach is to direct the vents upward when cooling and downward when heating. Cleaning the air conditioner only when performance deteriorates: The air filter should be replaced periodically because dust accumulation can stick to the filter, breed bacteria, and produce musty odors. It is best to replace the filter at least once a year. Keeping the air conditioner on for extended periods: Some car owners often leave the air conditioner running continuously after starting the car. Prolonged use can increase the pressure on the condenser and damage the cooling system. Therefore, the air conditioner should not be used for excessively long periods each time. Immediately switching to recirculation mode upon entering the car: When first entering the car, windows should be opened for ventilation, and the external circulation mode should be activated. Only after all the interior air has been expelled should the recirculation mode be used. Keeping recirculation mode on for long periods: Since recirculation mode circulates air within the closed cabin, the oxygen level inside the car will continuously decrease. If gasoline in the cylinders is not fully burned, carbon monoxide from the engine may leak into the cabin, worsening air quality and potentially harming occupants.
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Can Replacing Car Headlights with LED Pass the Annual Inspection?

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Which Volkswagen model is the extended version sedan?

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