AC Drain Lines

Topic: HVAC Drain Lines

Why should the drainage system of an air conditioner be cleaned?

This is the condensate drain, which plays an important role in removing condensation produced by your air conditioner's evaporator coil. If the line isn't properly cleaned, algae and mold can grow inside and clog the drain, causing elevated humidity, musty odors and water damage inside your or your neighbor’s home. It will also cause your system to shut off until the clog is cleared, and the water has drained. Now is also a perfect time to inspect you AC filter.

How should I clean my drain line?

Step 1: Turn off your air conditioner. Turn off the system at the thermostat and the power source as well.

Step 2: Locate the access point on the drain. Drain lines are mostly a T-shaped vent tee with a cap. Gently remove the cap at the top of the drain and look for the blockage.

Step 3: Flush with distilled vinegar. Vinegar is a strong acid with a pH level of 2.5 and is proved to have cleaning properties. Add ? cup of vinegar to the drain line through which the cap is removed. If the vinegar has a stench, you can use hot water or hydrogen peroxide with a dash of dishwashing liquid.

Step 4: Let it sit for about 30 minutes. The duration will help in dissolving residues that are inside the pipe. After 30 minutes, flush the pipe with clean water. Make sure everything is flowing and operating.

Step 5: Repeat every 90 days or as needed. To be sure that your unit is well functioning, repeat this procedure every month to prevent bacteria build up and keep your system operating smoothly.

·????????If you are uncomfortable doing this project on your own, please contact a licensed handy man or your preferred AC company.

Doing basic maintenance on all your appliances is the responsibility of the home owner and can significantly extend the operation life of the equipment.

Shawn Foran

Maintenance Professional