AC/Heat control knob - need suggestions.

[Cynical]

I have a 99 mits I bought from Fremont Mini Trucks (met him here after coming to research for a different truck I wanted to buy). The truck has a/c, controlled by a three knob setup. Left most knob controls where the air goes -- floor, defrost, or dash vents. Middle controls compressor and fan speed. Right most controls temp (blend control).

The left knob, controlling where the air blows, is FUBAR. I cannot divert air to the floor vents or defrost/windshield vents. Even if I physically manipulate the plastic behind the knob (the knob is junked), nothing changes. I suspect the damper or whatever it is that is mechanically linked to the knob assembly is broken or just stuck pretty well. Any ideas to fix this? Rig it? Circumvent it?

[TRAX and HORNS]

Most likely the wire is hung up inside the wire housing(rusted). Happens to a lot of them. Got to get a hold of wire and work it, some wd40, a 12 pack and get her done. If you ever crease the wire you are SOL. It will bend at the crease every time.

[MichTrucks]

Sorry to hear about the problem. Doug from Fremont usually goes over his trucks pretty well. I've had the same issues on one of our trucks. I disconnected the cable and operated each to determine where the issue was. Found it to be a hung-up flapper door.

[Cynical]

I don't think Doug did anything wrong -- it was hot when he delivered it, we probably never checked it and it is quite possible there was nothing wrong with the knob when he turned the truck over to me (it's been almost a year).

I have a feeling it's going to suck trying to fix this. I might have to just live with it!

[TRAX and HORNS]

Just yesterday I pulled the dash off a Suz. DD51T. The flap would not open to the floor vents. It was the wire that was bent. I was lucky and bent it back and it held in place. Most of the time it just bends again right in the same place. I tried to shot some silicon lub. down cassing. not sure if any got in. For now it is working.