knds36

Hi
I'm brand new to this forum. Glad to be here. I have a 1998 Hyundai Elantra wagon. The Heat and AC control stopped working. The knob that controls the direction does nothing; won't change from defrost to floor, etc. The air seems to come out from all locations. I used to hear an air-like noise when it worked and switched so I assume it's pneumatic. Probably a solenoid? Can anyone help? I want to fix it myself.