How about pulling the control out and checking all the cables. There are keepers on the cable where it attach's to the controls, sometimes these come off. Also look on the underside and make sure no wires are pushing it back. Oh, you have AC, all this is going to be behind the AC unit, except for the controller of course. Something is interfering with the movement, find that.
[B][COLOR="Yellow"]GROWING OLDER IS MANDATORY, GROWING UP IS OPTIONAL[/COLOR][/B] [COLOR="DarkRed"]TREAD LIGHTLY[/COLOR]