I have a 2002 Gran Caravan with Auto dual air system. When I turn on the A/C it blows cold air in the rear of the van and hot air up front. Both the passenger and drivers side blow hot air. The door actuator on the drivers side works fine. I took it in to the Dodge dealer for diagnostics and he told me that the actuator door on the evaporator must not be working, probably broken. How do I get at this ? I have most of the dash apart but can't figure out how to remove the centre part where the cup holder goes into. Can I get some help Please!