2012 Buick Regal, 4 door, no sunroof, On 3 occasions there has been water under the carpet behind the drivers seat floorboard. Yes, behind the drivers seat. Each time I have taken the back seat out, pulled up the carpet to find 1 inch of water. The water is very clean. Does not coincide with rain that I can think of.
It appears to be wettest up under the drivers seat by the hump. I park on a slight upward grade so naturally it would move to the back if it was coming from further up. I removed the trim and sprayed the outside of the car down suspecting door seals. No leaks were detected. The car does have AC vents under the seats and running through the center console to rear vents.
I know little about cars and the AC, but is it possible the water is coming from the AC? Thoughts?