81 CJ5 heat/fresh air cable hard to move

[Charlie62]

I replaced the cable then tried to pull to heat it was OK but when I pull further to the fresh air it is VERY hard to pull further. I lubed the controls and had my wife pull the cable to the fresh air while I pushed on the cam it goes a lot better. Anyone had this problem? What were they like when new?
I am sure the cable was broken because of being hard to pull. Just got this Jeep before Christmas.

 

[Torxhead]

I would suggest disconnecting the cable where it goes into the vent to find out just where the snag is.

 

[Lumpy Grits]

Use Graphite based liquid lock lubricant on the cable sheath.
LG

 

[Peanut Butter]

The cables move doors inside the heater box. Look at this write up to see what they do: CJ Heater Box Restoration...pic heavy!! - JeepForum.com A rebuild of the heater box may be in order. If you disconnect the cables from the box and test them, you'll have your answer.