Why Your AC Is Leaking Water — Causes & Fixes

March 2, 2026· 2 min read

A leaking AC is one of the most common complaints we receive from Sharjah homeowners. Water dripping from your indoor AC unit can damage walls, floors, and furniture if not addressed promptly. Here’s why it happens and how to fix it.

Common Causes of AC Water Leaks

1. Clogged Drain Line

This is the #1 cause. The condensate drain line can get clogged with dirt, algae, or mold, causing water to back up and overflow from the drain pan.

2. Dirty Air Filters

When filters are clogged, airflow is restricted, causing the evaporator coil to freeze. When it thaws, excess water overwhelms the drain pan.

3. Low Refrigerant

Low refrigerant causes the evaporator coil to freeze, leading to excess water when the ice melts.

4. Broken Condensate Pump

If your AC uses a condensate pump to remove water, a pump failure will cause water to accumulate and leak.

5. Improper Installation

If the unit wasn’t installed level or the drain line has insufficient slope, water won’t drain properly.

Quick Fixes You Can Try

When to Call a Professional

If the leak persists after basic troubleshooting, or if you notice ice on the unit, call a professional immediately. Continued leaking can cause water damage and mold growth.

Air-Con.ae provides fast, reliable leak repair services across Sharjah. Call us for same-day service.

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