How to Safely Clean Your AC Drain Line with Vinegar

Keeping your air conditioner in top shape isn’t just about cool air—it’s about long-term performance and avoiding costly repairs. One key maintenance task that often gets overlooked? Cleaning the AC drain line. Over time, mold, algae, and debris can clog this line, leading to water damage and reduced efficiency.

The good news: you can clean it easily with a household staple—white vinegar.

Why Vinegar Works

Vinegar is a safe, natural alternative to chemical cleaners. Here’s why it’s a smart choice:

• Breaks Down Gunk: Its acidity dissolves buildup inside the drain line.
• Fights Mold & Bacteria: Vinegar’s antimicrobial properties help eliminate odors and prevent growth.
• Eco-Friendly & Affordable: No harsh chemicals, no big expense—just clean, green maintenance.

What You’ll Need

• White vinegar
• Water
• A bucket or container
• Funnel (optional)
• Wet/dry vacuum (optional)

Step-by-Step Instructions

1. Power Down Your AC
Safety first—turn off your AC system before starting.
2. Find the Drain Line
Look for a PVC pipe near the indoor unit or condensate pan.
3. Mix Your Cleaning Solution
Combine equal parts white vinegar (1/4 cup to 1/2 cup) and water (1/4 cup to 1/2 cup). For stubborn clogs, use more vinegar.
4. Pour It In
Use a funnel if needed. Slowly pour the solution into the drain line and let it sit for 30 minutes.
5. Flush the Line
Rinse with clean water (2 to 4 cups) or use a wet/dry vacuum to remove loosened debris. Repeat until the water runs clear.
6. Restart Your AC
Once everything’s clean, wait 5 minutes and power your system back on and enjoy improved performance.

We recommend doing this at least twice a year, Spring and Fall.

Keep It Cool with Regular Maintenance

Doing this once a year—or more often if needed—can help your AC run smoother, smell fresher, and last longer. Whether you’re in Houston or anywhere with hot summers, this simple vinegar trick is a smart way to stay ahead of AC issues.