Finding a puddle of water near your air conditioner is more than just a mess—it’s a sign something’s not working the way it should. Many homeowners are caught off guard when their AC starts leaking and aren’t sure what’s causing it. While some moisture around your system is normal, consistent leaking usually points to an underlying issue. If left unresolved, it can lead to mold growth, water damage, and costly repairs. 

The good news? Most AC leaks have simple causes—and straightforward solutions. In this blog, we’ll walk you through the most common reasons air conditioners leak water, how to fix them, and when to bring in the pros at King of Home Solutions.

Is it Normal for an AC to Leak Water?

Yes—some water is normal when your air conditioner is running. As part of the cooling process, your AC removes humidity from the air. That moisture condenses on the evaporator coil and drips into a drain pan, where it’s safely directed away through a condensate drain line.

However, if you notice water pooling around your indoor unit, dripping from vents, or staining walls or ceilings, it’s a sign that something isn’t working as it should. A small amount of condensation is expected—but active leaking, especially inside the home, signals a problem that needs attention.

Catching the issue early can prevent bigger headaches like mold growth or water damage to your flooring, drywall, or insulation.

Common Reasons an Air Conditioner Leaks

Water leaks from your air conditioner can be caused by several different issues—some simple, some more serious. Here’s a breakdown of the most common culprits.

Clogged Condensate Drain Line

The drain line is responsible for carrying moisture away from your unit. Over time, it can become clogged with dirt, algae, or mold. When the line is blocked, water backs up and spills over the drain pan, creating puddles around your system.

Dirty or Frozen Evaporate Coil

If the evaporator coil gets too dirty or airflow is restricted, it can freeze over. When the ice eventually melts, it creates excess water that may overwhelm the drainage system and leak inside your home.

Damaged or Overflowing Drain Pan

Older or cracked drain pans can’t hold moisture effectively. If your pan is rusted, misaligned, or too shallow, it may overflow—even if your drain line is clear.

Low Refrigerant Levels

Low refrigerant can lower the pressure in your system and cause the evaporator coil to freeze. When that ice melts, you may see unexpected water leaks as a result.

Improper Installation or Poor Shape

If your system wasn’t installed correctly—or if the drain pan isn’t sloped properly—water may not flow into the drain line as intended. Instead, it can collect and leak from your unit over time.

Warning Signs of a Leaking AC

Some leaks are obvious, while others can go unnoticed until damage starts to build. Here are some key signs that your air conditioner may be leaking water:

Visible Puddles or Damp Spots

The most noticeable sign is water pooling around your indoor unit. You may also see damp flooring, baseboards, or water stains nearby.

Musty Smells Near Vents

If mold or mildew starts forming due to excess moisture, you may notice musty odors when your AC kicks on—especially around vents or the unit itself.

Reduced Cooling Performance

A leak often means something is off inside your system. If your home isn’t cooling like it used to, it could be related to a frozen coil or other internal issue causing the leak.

Ice or Frost on Coils

Check your evaporator coil for signs of ice. Frozen coils are a strong indication of restricted airflow or low refrigerant—both of which can lead to leaking when the ice melts.

Dripping Sounds Indoors

Hearing water drip inside your home, especially near your ceiling vents or walls, is a clear warning sign that your AC is leaking somewhere it shouldn’t be.

When to Call a Professional

While a few AC leaks can be solved with simple DIY steps, many require a trained technician to diagnose and repair safely. If you’ve tried basic troubleshooting and the leak persists—or if the system isn’t cooling properly—it’s time to bring in an expert.

Call a professional if:

• Water continues to leak after clearing the drain line or changing the filter

• You notice water near electrical components, which could pose a serious safety hazard

• There are signs of low refrigerant, such as ice buildup or hissing sounds

• The drain pan is cracked or rusted and needs replacement

• You suspect installation issues or your AC hasn’t been serviced in over a year

Technicians from King of Home Solutions can accurately assess the problem, prevent further damage, and ensure your system runs efficiently moving forward.

Stop the Leak with King of Home Solutions

An air conditioner that’s leaking water isn’t just a nuisance—it’s a warning sign that something needs attention. Whether it’s a clogged drain line, frozen coil, or something more serious, taking action quickly can save you from costly water damage and uncomfortable breakdowns.

Many of these issues are preventable with regular maintenance and prompt repairs. Knowing what to look for—and when to call for help—can keep your AC running smoothly all season long.

Contact King of Home Solutions today for fast, reliable AC leak repairs and professional HVAC service. We’ll find the cause, fix the problem, and help protect your comfort and your home.