How to Clear Out Your AC Drain: A Simple DIY Guide If you’ve ever noticed water pooling around your AC unit or a mysterious wet floorboard in your car or home (and it’s not radiator fluid), chances are your air conditioner drain line is clogged. I’ve had this happen before and, trust me, it can look scarier than it really is. The good news? This is one of the easier fixes you can handle yourself without calling in a professional. Why Your AC Drain Matters Your air conditioner doesn’t just cool the air—it also removes moisture. That water needs somewhere to go, and that’s where the AC drain line comes in. When it gets clogged by dirt, algae, or debris, water backs up and can leak inside your home or vehicle. Here’s what can happen if you ignore it: Wet floorboards (that aren’t from radiator fluid) Water stains on walls or ceilings Mold and mildew growth Reduced AC efficiency I once had water pooling on the passenger-side carpet of my car. At first, I thought so...