[Cunningr]

Trying to remember, but I think a bad heater coil can cause that to occur. The seepage of hot water mixing with the cold ac makes a fog or smoke come out the vents. If its odorless then another possibility is a stopped up drain hole.

However, some much smarter mechanics will chim in here. Good luck. Check see if your enging coolant droped might help identify a leak if the coolant dropped.