Car A/C -- hot/cold air knob stuck. Won't move to "cold".?

2002 Mitsubishi lancer. I obviously left it on "hot" for the entire winter, and now I realize it's stuck there -- it will at most move halfway but won't go all the way to "cold"? Any pointers for self-service?

Car A/C -- hot/cold air knob stuck. Won't move to "cold".?
The blend door is stuck or the cable went bad, but what your symtom sounds like is the door is stuck! Most Mits heater controls are not inside the HVAC box they put them on the outside so you need to remove the access cover (7MM nut driver) that is across the drivers side under dash area and lay on your back on the floor on the drivers side. Reach up and turn the knob and you will see a gear assembly made from white plastic that has a cable attatched to it wiggling when you wiggle the knob! Try to move the assebly by hand If you can then you need to lubricate the gear assy and possibly replace the cable. If it wont move even at the gear assy then something fell down one of the vents and is blocking the motion of the door!!
Reply:Continue to move the knob to free up cable. Next try to find the cable under the dash then use some vise grips to move cable while spraying WD40 to lube cable.
Reply:Knob or slider? Probably a slider. Your cable is stuck or bent. I suppose it's possible that it could be the door, but much more likely just the cable. You're not gonna like this job, unless you get lucky and can just replace or repair the cable without removing the dashboard. (and yes, you might be able to; you'll have to look to see if you can reach the where the cable attaches to the heat "box". Even if you have to take the dash apart, it's really not that hard. BUT get a book (a repair manual) and follow along STEP BY STEP.

snow of june