Why Is Your Air Conditioner Leaking Water?
Noticing a puddle of water around your indoor air conditioner unit can be a worrying sight. If you’re wondering why the AC leaks water, you are not alone. Many homeowners frequently deal with this issue. Often, the cause is simple and can be fixed quickly. For over 90 years, Aero Energy has helped customers understand their home systems for peace of mind.
A small amount of moisture is normal as your AC removes humidity from the air. But a steady drip or a large pool of water signals a problem that needs attention. Let’s explore the usual reasons behind an AC leaking water.
A Clogged Condensate Drain Line
A clogged drain line is often the primary cause of water leakage. As your AC cools warm air, it pulls moisture out of it. This moisture drips off the evaporator coil into a drain pan and flows out through a pipe. Over time, algae, mold, and dirt can clog this pipe.
If the drain line is clogged, water cannot flow properly and may back up. It will fill up the drain pan and eventually overflow. You might also notice a moldy smell coming from your vents. A technician can quickly clear this clog with a special vacuum, restoring proper drainage.
A Dirty Air Filter or Frozen Coils
A surprisingly simple fix is often your air filter. A dirty filter restricts airflow over the evaporator coils. The coils freeze as a result, and when the ice melts, it generates more water than the drain pan can manage, resulting in an overflow.
Checking and changing your filter is a key part of basic AC repair and maintenance. It is an easy task you can do yourself to prevent this problem. If you see ice on the coils, turn the system off and let it thaw completely before running it again with a clean filter.
An Improperly Leveled Unit or Broken Pump
Sometimes, the issue is with the unit itself. The indoor air handler must be perfectly level for water to flow correctly into the drain pan. If it has shifted over time, water can miss the pan and drip directly onto your floor.
In homes where the AC unit is in a basement, a condensate pump is used to send water uphill and out of the house. If this pump fails or its switch gets stuck, water will collect and leak. A professional can check the unit’s level and test the pump to see if it needs repair or replacement.
A Disconnected Drain Line
The pipe that carries water away from your AC unit is connected with fittings that can sometimes come loose. This can happen due to vibration from the system running over time, or if it wasn’t secured properly during installation. When this connection separates, water will drip directly from the point of the disconnect instead of flowing safely outside.
You might be able to see a disconnected PVC pipe by visually inspecting the drain line near the indoor air handler. If you find a loose connection, you may be able to push it back into place. However, it is best to have a technician secure it properly to prevent it from happening again.
A Rusted or Cracked Drain Pan
Located underneath the evaporator coils, the drain pan is designed to catch all the condensation. Over many years, this plastic pan can become brittle and crack, or a metal pan can rust through. Even a small hole will allow water to leak out onto your floor or into the unit itself, causing damage.
A damaged drain pan is not a simple fix and often requires professional service to replace. If your AC unit is older, this is a more likely cause of a leak. A technician can assess the pan’s condition during a maintenance visit and recommend the best course of action to stop the leak.
What to Do When You See a Leak
If you find your AC leaking water, the first step is to turn the system off at the thermostat. This stops the production of more water and prevents potential damage to the unit. You can then try to remove any visible water to prevent damage to your floor or ceiling.
After you have turned off the system, check the air filter and replace it if it looks dirty. You can also inspect the drain line where it exits your home for any visible blockages. For persistent clogs, a failed pump, or if you are unsure, it is best to call a professional.
Keeping Your System Running Smoothly
While an AC handles air, other home systems like your water heaters are equally important for comfort. Keeping all your appliances well-maintained makes sure that your whole home runs efficiently. Addressing a water leak quickly protects your AC system and your property.
For generations, Aero Energy has been a trusted partner in home comfort, helping families stay cool and dry all summer long. A simple service call can give you confidence that your system is in good shape.