How do I go about fixing this, when I turn on my AC it blows at the feet no matter what setting its on( head, head n feet, window etc) and it blows from the side vents too but not from the center vents. What can cause this and how do I fix this i.e. make it blow from all four vents and not from foot unless foot setting is on.
Help would be appreciated

 

bump somebody??

 

bump