[Incompatible]

I have had this problem since new (intermittently), took it in to the dealer twice and of course they could not duplicate the problem. With mine, the change over is sluggish, as if something was sticky in the mechanism.

I have developed a routine which seems to minimize the problem during the months when I drive windows down and do not use the air controls which then become "sticky". After driving for a while and allowing everything to fully warm up, I will turn the fan and heat to high and cycle through the windshield/vent/floor settings slowly several times. Initially it takes about 10-20 seconds to redirect the air between settings but after several cycles, the redirect will occur in a few seconds.