GoTo:   http://westfalia.org/eve/forums/a/tpc/f/39960355/m/8726012411

...Bob - '85 Westy, GoWesty 2.2 engine

>Can anyone tell me where to find explanation of heat
>and airflow for camper.
>
>Purchased copy original manual expecting it to be in there
>but only discusses fridge etc.
>
>I know which lever is heat and which is defrost but exact
>use of two fan switches, front doors vents open/close
>purpose. Think its to help rear ventilation.
>
>Rear vents and finally position of lever for under seat
>heater to turn off and on.
>
>GO