Seeing water leak from your AC unit? You're not alone—and it's often a sign of a small issue that could become a big problem fast. If you're a homeowner in Bucks County or the Greater Philadelphia area, this guide will help you understand why your air conditioner might be leaking and what you can do about it.
Common Reasons Your AC Is Leaking Water
1. Clogged condensate drain line
Your AC pulls humidity from the air and drains the resulting condensation through a thin pipe. When that drain line gets clogged with dirt, mold, or debris, water backs up and spills out of the unit.
2. Cracked or rusted drain pan
The drain pan under the evaporator coil catches condensation. Over time, pans—especially older metal ones—can rust or crack, letting water leak through.
3. Frozen evaporator coil
Restricted airflow (often from a dirty air filter) or low refrigerant can cause the coil to freeze. When it melts, water may overflow the pan.
4. Improper installation or aging parts
A unit that isn’t level or has worn-out components may struggle to drain properly. Over time, this can lead to leaks inside the home or near the indoor unit.
5. Standing Water in the Drain Pan
If your pan is constantly full of water, it may mean a partially blocked drain or a system that's not draining at the right slope.
Preventative Maintenance Checklist
Want to stop water leaks before they start? Here’s what to do:
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Replace air filters every 30–90 days
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Clean the condensate line annually
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Inspect and replace the drain pan if needed
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Check refrigerant levels during tune-ups
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Ensure the unit is level
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Install safety switches for automatic protection
Need help with any of this? ECI Comfort offers professional, affordable AC maintenance services throughout Bucks County and the Philadelphia suburbs.
Frequently Asked Questions
Why is my AC leaking water inside my house?
Usually from a clogged drain line or a cracked drain pan. Frozen coils can also cause overflows once they thaw.
Can I still use my AC if it’s leaking?
You shouldn’t. Water leaks can damage drywall, ceilings, or even the AC unit itself. Shut it off and call a professional.
Is a leaking AC dangerous?
Leaks aren’t usually dangerous on their own but can lead to mold, rot, or electrical issues if left unchecked.
Final Thoughts
Don’t ignore water leaking from your AC—it’s often easy to fix if caught early. From clogged drain lines to frozen coils, routine maintenance and smart safety upgrades can keep your system dry and damage-free. If you live in Bucks County or the Philly area, let ECI Comfort handle it. We’ll make sure your AC runs like it should—cool, quiet, and leak-free.
If you live in the Delaware Valley/Greater Philadelphia area and would like to find comfort within your home, visit our website or give us a call at 215 - 245 - 3200 to learn more.
