2000 Buick Regal "cabin filter hard change 1998" Questions

...cabin air filter isnt closing is it an easy fix I have a leak coming from underneath the dash on a 2000 buick regal when it rains.. I think the door underneath the cabin air filter isnt closing. Is ...

...is very cold including the pipes. What could be the problem? change your cabin air filter, it is probably clogged not allowing air flow. see your owner's manual for instructions. I hope this ...