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Water Leaking From Car When AC Is On: Causes and Solutions

During the hot summer months, many people in the United Kingdom rely on their car’s air conditioning system to keep them cool and comfortable while driving. However, if you notice water leaking from your car when the AC is on, it can be a cause for concern. Here, we will explore the possible causes of this issue and provide solutions to help you address it.

One common reason for water leakage is condensation. When the AC is running, it cools the air inside the car. This causes moisture in the air to condense, forming droplets of water. The condensation is typically drained through a hose that leads outside the vehicle. If this hose is blocked or disconnected, the water may accumulate and leak into the car.

Another potential cause of water leakage is a clogged evaporator drain. Over time, dirt, debris, and mold can accumulate in the evaporator unit, blocking the drain. This can cause water to overflow and leak into the car’s interior.

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To address this issue, you can try locating the drain tube under your car and checking for clogs. If you find any debris, you can use a pipe cleaner or compressed air to clear the blockage. If the problem persists, it is advisable to seek professional assistance.

Here are some frequently asked questions regarding water leakage from a car when the AC is on:

1. Why is water leaking from my car when the AC is on?
– Water leakage can be caused by a blocked or disconnected condensation drain hose or a clogged evaporator drain.

2. Is water leakage from the car’s AC system normal?
– Some water leakage is normal due to condensation. However, excessive leakage may indicate an issue with the drainage system.

3. Can I fix a blocked condensation drain hose myself?
– You can attempt to clear the blockage using a pipe cleaner or compressed air. However, professional assistance is recommended for persistent issues.

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4. How do I locate the drain tube under my car?
– The drain tube is usually located near the firewall on the passenger side of the vehicle.

5. Is water leakage harmful to my car?
– Excessive water leakage can damage your car’s interior, including the carpets and electrical components.

6. Can mold growth inside the AC system cause water leakage?
– Yes, mold growth can block the evaporator drain and cause water to overflow.

7. How often should I check and clean my car’s AC drainage system?
– It is recommended to have your AC system inspected and cleaned at least once a year to prevent issues like water leakage.