No stupid questions there. I have checked it and to what I can see, the blade mounting ends up the same if taken off and remounted "backwards". The core fits in the housing and the small motor nests inside the middle of the core with the shaft protruding - the blade is approx the same diameter as the core and rotates in front of the core taking whatever heat is emitted from the core and "blowing" it into only one of two exits provided by the little flap door. The flap pushed in one direction blocks the defroster hose vent and creates in opening into the cab, move the arm the other way and the flap closes the opening into the cab and allows air to move into the defroster hose vents. Flow of air is a dribble however and the motor kicks ***. I will take it apart again and study it some more. Still open to suggestions and opinions though, as I obviously am somewhat new at this. Thanks,
Bob K
