What Causes Car Air Conditioning to Leak Water?

1 Answers
DiGemma
07/30/25 2:14am
Whether it is normal for a car's air conditioning to leak water depends on the situation. If water leaks from the exhaust pipe or other external parts of the car when the air conditioning is on, it is a normal occurrence. This is condensation from the air conditioning and will not harm the car or the air conditioning system. However, if water leaks inside the car, such as under the passenger seat, it is abnormal and should be repaired at an auto repair shop. The car air conditioning system is designed to cool, heat, ventilate, and purify the air inside the vehicle. Its purpose is to provide a comfortable environment for passengers, reduce driver fatigue, and enhance driving safety. Reasons for water leakage when the car air conditioning is on: The refrigerant flows into the evaporator inside the car, where it absorbs heat from the air through contact with the evaporator. It is then compressed and expanded again in a continuous cycle, gradually removing heat from the air inside the car. Since the air contains a lot of water vapor, when it encounters the very cold evaporator, it turns into water and drains out from under the car chassis. Solutions for car air conditioning water leakage: Open the windows for ventilation after turning off the air conditioning. If the leakage is abnormal, promptly visit a specialized repair shop or 4S store for repairs to avoid affecting normal driving.
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