l have a 91 Town car and have trouble with the a/c being cold then goes warm. Someone here said it could be the actuater door how difficult to repair or is thier a way to over ride this to keep the cold air flowing?

yeah its a pain in the rear but you need a blend door actuator no real way to over ride it because its an semi automatic system pull the dash etc.gl2u p.s. the blend door linkage usually cracks.

My Truck did that found out it was the blend door motor replaced it and l am good to go. Hope this helps, By the way Its square with one connection no vacuum hoses, You can change it good luck