Dodge Repair Questions? Ask a Mechanic for Answers ASAP
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It sounds like your mode door actuator or door itself is bad.. Have you checked it? The heating-A/C system is equipped with two mode door actuators, one for the panel/floor-air door and one for the defrost-air door.
I have attached the directions to access the mode door actuator. I would see if the actuator is moving when you move it from vent to floor/defroster and if not then I would replace the actuator, and if it is moving then remove the actuator and see if you can spin the door all the way around and if you can then the door is broke and the HVAC assy will need to be removed to replace the mode door..
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