My car is a 1988 Audi 90 Quattro. We haven't had a heater in over a year and half now and no problems have arose from not using it yet. We have a pipe that the 2 tubes that lead to the heater core are hooked on so nothing is going through on purpose, and our radiator resevoir is full!! We came from MI in Aug of this last year, and back to WA state to live and ever since the winter hit and 28 days of straight rain, we have had nonstop puddling all over our car!! The backfloor has it the worse! It's atleast 3-4 in of water! Where is it coming from!!?? We vaccuum it up like every other day! And because it's cold out and we have no heater...it's molding the seat belts and center console and carpet (we have leather seats thank GOD!) This didn't happen the 18 months we were in MI so I'm wondering why it's started now??? The side panels outside have been broken too and the A/C has never worked...just thought we had to get it recharged and too lazy to actually get around to it! If someone could PLEASE tell me what's causing this!! Tax time is coming and so is money! Thanks in advance!

check all the seals around doors and trunk. Sunroof?
Also look for debris in the area below windshield.If drain is plugged then it will flow into car(that is where fresh air enters the car)