How to unclog a mini split drain line?

Clearing a clogged condensate drain line on a ductless mini-split system requires a systematic cleaning approach to remove trapped algae and slime. First, turn off the mini-split system at the circuit breaker for electrical safety. Second, locate the flexible condensate drain hose where it exits your home to the exterior. Third, use a wet-dry shop vacuum to create a tight seal around the end of the drain pipe and run it for a few seconds to suck out blockages, debris, and sticky algae buildup. Fourth, pour a cup of distilled white vinegar down the internal drain pan or line to sanitize the pipe. You can troubleshoot drainage flow easily. You can verify that your unclogging procedure was successful when running the AC results in a steady, unimpeded flow of water outside without any indoor leaks.