[Martsy]

i have a smilar probelm kinda, on a 93 ranger as well, like it heats up fine and the thermosate is good and stuff, but inside you know on the actual thing to switch the heat on and off and to put it to panel and stuff or defrost, well it seems like i only get air to come out the vents when the turn nob is all the way to the high position, like i dont get any air, hot or cold coming out if its just on half way?? anyone know why?? it would like 2 months ago but not now? because of the cold weather???