Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Hello and welcome to just answer. This is not a solenoid. The mode and defrost doors on your truck are vacuum operated. The problem may be a vacuum leak at a line going to the HVAC control head or from the head to the vacuum door actuators on the HVAC housing, or the control panel itself. Did you have this issue before the blower motor problem was fixed?