Hi all. I have a problem with my 2009 Saab 9-3. For some reason, I am only getting heat from my dash vents, while the defrost and floor are blowing only cold air. I recently replaced my overflow tank and thought maybe there was air in the lines somewhere, so I had a flush and fill done on the coolant system, to no avail. I will set my heat to 80 degrees, and only my dash vents will blow hot air. The floor and defrost stay as cold as the outside air. Any ideas?