2004 Dodge Ram 1500 Heat blows from defrost vent when I put the control mode to the floor. I comes out of the dash vent when on thaat setting but never the floor. Any ides or diagrams?

Sounds like a problem with the ductwork, or control damper,, does the control system run off 1 tstat or 1 on each floor?




:)

Soulds like you have a vacuum problem. Most vehicles use vacuum to control the doors that regulate where the heat goes.