Possible cable issue?
 

I've got a 2003 Cav and my knob for adjust where the air is routed (floor, passenger, both, defrost) does not want to turn. It is at passenger now and when I turn it right to use the defrost, I can turn it but when I let go it springs back to passenger selection. Basically I can now turn it anywhere past passenger to the right. With winter coming, I need the defrost. Any suggestions? I am not mechanically inclined so any I can do without tearing up my dash would be great. Thanks in advanced!!

RE: Possible cable issue?
 

gonna have to rip open that dash, sounds to me like there is something stuck in there and thats whats making it spring back