Do the '93 F150's have a blend door problem?
 

Hi y'all, I'm new to the site. I have a 93 that has a mind of its own when
the a/c's on. It will blow cold air out of the dash vents for a while,then
blow out the floor vents. I've seen a lot of posts about blend door problems,
but they seem to cover newer models. Does my '93 have a bad blend door,
or is there a problem with the actuator?