How to Fix a Clogged Central Air Conditioning Drain

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How to Fix a Clogged Central Air Conditioning Drain

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Many modern homes are outfitted with central air-conditioning systems. Maintenance on these systems is critical, especially if you are trying to sell your home. One potential issue that can occur is a clogged drain. The indoor system portion generates condensate, or water residue, that must be drained to the outside. A pipe extending from the home’s exterior wall usually allows this condensate to leave the interior, but it can become clogged with algae or other buildup. A simple clog removal process will allow you to have a properly functioning system for home inspection and a possible sale.

1. Locate the drain line on the exterior of the home. This line is normally placed near or behind the outside air-conditioning unit; it is typically a black or white PVC (polyvinyl chloride) pipe extending from the wall.
2. Remove the cover from the access hole on the drain line with a wrench. Each pipe might have a different cover type depending on the original installation. Consult your system’s manual for specific cover removal directions.
3. Place a wet/dry vacuum near the access hole. Confirm that the vacuum is set for a wet suction process by removing any paper filters from its interior. Each vacuum manufacturer has a different setup process for wet suction procedures. Consult the vacuum’s manual for specific instructions.
4. Hold the hose tightly against the access hole. Turn the vacuum on. Allow the vacuum to suck the clog out of the drain pipe.
5. Turn the vacuum off. Look inside the vacuum’s storage tank by hand-releasing the cover. Visually verify that the clog entered the vacuum. There should be a visible amount of algae or other residue inside. Reattach the tank’s cover.
6. Remove the vacuum from the access hole. Reattach the access hole’s cover with a wrench. Turn on the air-conditioner system and allow it to run through its processes. Water should slowly drip from the drain pipe indicating the clog has been removed.

Source: https://homeguides.sfgate.com/fix-clogged-central-air-conditioning-drain-24929.html

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