Water Leaking from Your AC's Secondary Drain Line? Here's Why You Should Call a Pro

Is Your AC Leaking Water Outside? It Could Be the Secondary Drain Line

If you’ve spotted water dripping from a pipe outside your home, especially near a window or roof edge, your secondary AC drain line is likely active. This isn’t normal — and it’s often a sign that your primary drain line is clogged. If you're in North Texas and experiencing this, it's time to contact the pros at Texas AC Services.

What Is a Secondary Drain Line on an HVAC System?

Your HVAC system creates condensation while cooling. This moisture is normally drained safely through the primary drain line, which connects to your home’s plumbing. When that line gets blocked, the overflow is diverted to the secondary (or emergency) drain line — a visible pipe that exits your home, often above a window, garage, or doorway.

If you see water coming from this line, your system is giving you a warning sign that should not be ignored.

Why You Shouldn’t Ignore a Leaking Secondary Drain Line

If your air conditioner is leaking water outside, you may be tempted to brush it off. However, this leak often signals bigger problems, including:

🔧 Clogged HVAC Drain Line

Dirt, algae, or mold buildup can clog your primary drain, forcing water into the secondary line.

🏠 Risk of Water Damage

If both lines become blocked, water can back up into your attic, ceilings, or walls — leading to costly repairs.

🌿 Mold and Mildew Growth

Standing water encourages mold and mildew, which can affect your home’s air quality.

⚠️ HVAC System Shutdown

Modern systems often shut down when a drain backup is detected to prevent further damage.

Where Is the Secondary Drain Line Located?

In most North Texas homes, the secondary AC drain line is located:

• Near an upstairs window

• On the side of the house below the attic

• At the roof eave or soffit

• Above a garage or exterior door

If you notice water dripping from any of these spots — especially while your AC is running — call an HVAC professional immediately.

Call Texas AC Services for Fast HVAC Drain Line Repair in North Texas

At Texas AC Services, we’ve helped North Texas homeowners with HVAC maintenance and AC water leak issues since 2008. We offer fast, professional service to clear your drain lines, inspect your system, and prevent further damage.

Whether you need emergency AC repair, regular HVAC maintenance, or a drain line inspection, we’ve got you covered.

📞 Call Now: 469-905-2665
📧 Email Us: info@txac.pro
🌐 Visit Our Website: https://txac.pro
📍 Leave a Review or Find Us on Google: Texas AC Services on Google

Don’t Let a Simple Leak Become a Big Problem

If your AC is leaking water from the secondary drain line, don’t wait until it turns into a major issue. Contact Texas AC Services — your trusted HVAC company in North Texas — and get your system back in top shape.