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More than Hot Air

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Steps to Take If You Notice a Puddle under Your HVAC Unit

pooled water under a hvac system

HVAC troubleshooting is never any fun. You usually wonder what’s wrong, and then begin to panic; are you going to have to replace the whole system?

Well, when it comes to finding puddles of water under your air conditioner, you can rest a little easier. The culprit is usually a plugged drain line, used for removing condensate.

What’s a Condensate Drain Line and How Does It Get Clogged?

Air conditioners work, in part, by removing excess moisture and humidity from the air. Moisture (also called condensate) hits the evaporator coil and begins accumulating. Once there’s enough, the resulting water drips down into the drain or collection below. The water then flows out a condensate line, usually made of PVC or other plastic.

Over time, your line can get plugged-up with various particulates: dust, mold, and even mildew or algae. The result is a backup in the line, which causes water to spill out onto the floor.

In other words? You’ve got puddles.

How to Clear a Clogged Drain Line

You can usually clear a blocked line on your own, without much difficulty. If you have a well-stocked garage, you can use an air compressor to blast through the line and clear the clog. Alternately, try using a wet/dry shop vac to suck the gunk out, or push a small wire through the tube, forcing out any obstructions.

Preventing Clogged Drain Lines (and Puddles)

Mix up a weak solution of bleach and water, and then pour it through your condensate line twice a year. This prevents mold, algae, and other undesirable substances from growing inside, and keeps your lines clear. Read and follow label directions, and always use caution and care when dealing with household chemicals.

Still Having Problems with a Clogged Drain Line?

If you think it’s more than a simple clog, reach out to us today, and leave the troubleshooting to the pros!

Jerry's Air Conditioning & Heating



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931 South Santiago Drive

Florence, SC 29501

843-665-7470

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