What to Do When the Car Air Conditioner Leaks Water into the Car?

2 Answers
SanAndrew
07/24/25 6:00am
Reasons for car air conditioner leaking water into the car: 1. Blocked drain pipe: Long-term use can cause the drain pipe to age, loosen, or bend, forming a wavy shape that leads to poor drainage and local blockages, causing water to leak into the car. Replace the drain pipe to fix the issue. 2. Clogged drain outlet: The outdoor drain outlet may be blocked by debris, preventing condensation water from draining. This can cause water to back up and eventually leak into the car. Clean the drain pipe to resolve the issue. 3. Improper installation: If the indoor unit is tilted excessively or the pipe direction is too high, water may not flow properly, leading to accumulation and eventual leakage into the car. Reinstall the unit to correct the problem.
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DelMorgan
08/11/25 1:42am
I've dealt with air conditioning leaks into the car before, and many issues can be fixed with DIY solutions. First step, check the AC drain tube, which is usually located at the bottom of the evaporator case. Over time, it can get clogged with dust or leaves, causing water to backflow into the cabin. Use a thin wire or compressed air to gently clear the blockage – be careful not to be too rough to avoid damage. After cleaning, test the AC by running it to see if the leak persists. If it still leaks, it might be due to aged evaporator case seals or cracked pipes, requiring part replacements. DIY repairs can save significant money, but patience is needed. Also, I recommend regularly replacing the cabin air filter and cleaning the drain outlet to prevent clogs. Water condensation during AC operation normally drains out from under the car – water entering the interior is a fault signal. Fix it promptly to prevent moisture buildup and mold, which affects cabin air quality and electrical safety.
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