Why Your Air Conditioner Leaks Water: Causes and Solutions

In the scorching Singapore summers, your air conditioner often works tirelessly to keep your home cool and comfortable. But what should you do if you find your air conditioner leaking water? 

In this article, we’ll explore the reasons behind AC water leaks and provide simple solutions to resolve the issue. If you’re facing this problem, read on at learn more.

How Water Forms in Your Air Conditioner?

Modern air conditioning systems consist of both indoor and outdoor units. Inside the unit, there’s an evaporator coil responsible for cooling the warm air, creating a pleasant indoor temperature. As warm air passes over the coil, condensation forms, just like water droplets on a cold glass.

This moisture gathers and drips into a drain pan, leading to a condensate drain line. Ideally, this line directs water outside, preventing leaks in your home. However, sometimes, the AC may leak indoors. Let’s investigate why and how to fix it.

Common Reasons for Aircon Water Leaks:

Clogged Drain Line:

If your AC is leaking inside your home, a probable cause is a clogged condensate drain line. Over time, dirt, dust, or mold can accumulate, obstructing the line’s flow.

Solution: Use a wet/dry vacuum to remove debris and unclog the line. If this doesn’t work, consider professional help, as they have specialized equipment to clear the blockage.

Dirty Air Filter:

Regularly changing your air conditioner’s filter is essential. A dirty filter can strain your system, hinder air circulation over the evaporator coil, and lead to freezing.

Solution: Check and replace your air filter every 30 days or as needed. An excessively dirty or clogged filter may be causing the water leakage.

Overworked AC Unit

During scorching weather, your AC may work extra hard to cool your space. When pushed beyond its limits, the evaporator coil can become too cold and freeze. This leads to excess water and leaks when it thaws. 

To prevent this, moderate your AC usage during extreme heat, and consider using energy-saving features to reduce the load on your AC.

Incorrect Installation

If your brand-new AC leaks on its first day, it must have been installed correctly. 

Check if your AC needs to be more evenly installed, and if not, consider seeking professional help to identify and rectify installation problems.

Low Refrigerant Levels:

Reduced refrigerant levels cause lower system pressure, potentially freezing the evaporator coil and causing leaks. Watch for inadequate cooling and strange sounds indicating a possible refrigerant leak.

Solution: Promptly address refrigerant issues to avoid costly repairs or replacements. Regular HVAC system inspections can help prevent such problems.

Rust or Damage to Drain Pan:

If your air conditioning system is older, the drain pan may be rusted or damaged, leading to leaks.

Solution: Consider replacing the old, rusty drain pan to check if it resolves the issue.

Broken Condensate Pump:

In cases where your AC unit is in the basement, a malfunctioning condensate pump can prevent water from being pumped outside.

Solution: Repair or replace the pump to prevent water damage to your home.

When in Doubt, Seek Professional Help:

If you need clarification on the cause of your AC water leak, it’s best to consult professionals. Ignored leaks can escalate quickly, causing significant damage. Get the issue checked promptly to avoid potential flooding.


In summary, understanding why your air conditioner leaks water and addressing the issue can help you maintain a relaxed and leak-free home during the hot summer months. With proper diagnosis and timely solutions, you can ensure your air conditioner functions efficiently.

Contact SoCool for Expert AC Repair:

For expert AC repair services in Singapore, turn to SoCool. We serve numerous communities in the region. Refrain from letting air conditioner leaks disrupt your comfort; contact us today for reliable assistance. Visit our website for more information about our services.

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