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Do Window Air Conditioners Leak Water?

Published in Air Conditioner Maintenance 2 mins read

Yes, window air conditioners can leak water, though they are designed to direct water outside.

Window air conditioners are designed with drainage systems to remove the water they produce, directing it outside. According to recent information (May 22, 2024), a leaky window AC unit is usually caused by a faulty drainage system.

Why Window ACs Leak Water & How to Fix It

Reason Description Solution
Clogged Drainage System Dirt, debris, or mold can clog the drainage hole or channel, preventing water from flowing out properly. Clean the drainage hole/channel with a wire, pipe cleaner, or a wet/dry vacuum. Regular cleaning can prevent future clogs.
Improper Installation Angle If the AC unit isn't slightly tilted towards the outside, water can pool inside and leak inwards. Ensure the unit is slightly tilted towards the outside, allowing gravity to help the water drain properly.
Damaged Drain Pan A cracked or damaged drain pan can lead to leaks. Inspect the drain pan for damage. If it's cracked, it will likely need to be replaced.
High Humidity In extremely humid conditions, the AC might produce more condensation than the drainage system can handle, leading to minor drips or leaks. Ensure proper ventilation in the room. Consider using a dehumidifier to reduce humidity levels.

Common Causes of Water Leaks:

  • Clogged drain
  • Incorrect installation
  • Damaged components

Troubleshooting Steps:

  1. Check the Drain: Look for any obstructions blocking the drain hole.
  2. Assess the Angle: Make sure the unit is tilted slightly outwards.
  3. Inspect the Pan: Examine the drain pan for any cracks or damage.

In most cases, drainage problems are fixable.

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