Several people on here told me to try a blower motor resistor for my durango, and that is exactly what it was, thank you for the advice, have not figured out yet why the rear heat is cold, but i am working on that, thanks again. dpfire29

 

feel the heater lines goign to rear heater core, if they are both warm you have flow, if one is warm and one is cold your rear heater core is blocked up

 

What year do you have? Where is the unit in the rear?

 

really? i thought you knew about this, at least models with the third row seating have another heater core in the panel on the passenger side of the third row seat, but the lines run out the bottom of the truck

 

Ya they run on the bottom of the truck to the passenger side rear most corner then go up into the panel for the core.

 

Covering my bases.. Who's to say he doesnt have a 99 with center console vents for heat but turning the AC on and off in the ceiling waiting for heat.. ( not saying he's stupid or anything, its just sometimes we dont get the brightest people )