ozarks_Runner

I tried to do a search, but it seems like everyone else's problems come from the rear defroster, and not the front like me
My heater and a/c are both working fine, but no matter what I can't get any air of any temp to come out of the vents up top for the defrost. I don't know if its a problem with the selector on the dash or possibly one of the lines for the air has come loose. Anyone have any suggestions? I'm getting really tired of foggy windows and ice that won't melt