Help...1999 Durango AC not effective when temp is above 85 deg.

From : cbhvac

Q: i just but this truck privately and the ac will not blow cold air. when the system is running if you feel the evaporator and condenser lines in the engine compartment one is real hot the other is real cold just like they should be. thats not an indication that the system is charged enough to remove any heat from the vehicles passenger compartment....just so you know. however its possible all is ok there and you have a blend door issue asn mentioned later in teh thread. i would be looking for a broken vac line or a bad control switch. it sounds l