Greetings, my 99 Avalon appears to have a plugged AC Condenser drain (wet carpet). How do I clean it out. Thanks...

So sorry that dosent sound like evaporator drain plugged but may be the heater core in the dash check your coolant level in the engine if it is low it will be a much more expensive problem. But if it is your evaporator drain line plugged jack up r side of vehicle climb under and look up by the fire wall and there should be a tube coming
down run a piece of single strand wire in and out with ac on and you should be able to dislodge blockage. Good Luck.

I have an Avy now but had a string of Celicas years ago that would get the clogged condenser drain nearly every Summer. The first guy is right...check to make sure it's not anti-freeze that's leaking; it probably isn't on a car that new. If it's not anti-freeze jack up the car and look for the drain. The Celcia drain was shaped like an S, part of the reason it would clog. I used to use a coat hanger and even blew low pressure air up there to clear the clog.