Is It Normal for Water to Leak Under the Car Chassis After Turning on the Air Conditioning?

1 Answers
VanEverett
07/29/25 6:27pm
It is normal for water to leak under the car chassis when the air conditioning is turned on. The refrigerant flows into the evaporator inside the car, where it absorbs heat from the cabin air through contact with the evaporator. It is then compressed and expanded again, repeating this cycle to gradually remove heat from the cabin air. Since the air contains a lot of water vapor, when it encounters the extremely cold evaporator, it condenses into water, which then flows out from under the car chassis. Here are some precautions for using the car air conditioning: First, turn on the external air circulation: It is recommended to fully lower the windows for ventilation. After a few minutes, when the engine warms up, close the windows and start driving. At this point, do not rush to close the windows. Instead, set the air conditioning to maximum airflow and drive with the windows open for two to three minutes to allow the hot air inside the car to dissipate. Then, press the cooling button, and the cooling effect will be much better. Avoid using the air conditioning for too long after parking: Some car owners, seeking coolness, tightly close the doors and windows and rest in the car with the air conditioning on. This can easily lead to a dangerous increase in carbon monoxide concentration inside the car, potentially causing poisoning.
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