A clogged air conditioner condensate drain line is a major cause of serious water damage in homes every summer.
Your central A/C not only cools the air inside your house, it also removes humidity. On a humid day, water vapor extracted from the air by the evaporator coil turns to gallons of liquid condensate that collects in the wide, shallow drip pan underneath the indoor air handler. As long as the condensate drain line flows freely, water is conveyed safely into the household drain system.
A defective A/C condensate drain is a common cause of water damage inside homes. Condensate is simply water vapor condensed into liquid by contact with the cold evaporator coil in the A/C’s indoor air handler. Whenever your air conditioner is running it’s producing condensate — as many as 20 gallons on a humid day. As long as everything’s working right, the condensate is collected and diverted away down a line into your household drain system. If something goes wrong, however, gallons of water may end up spilled into your home — often before you even realize there’s a problem.