I don't have an owners manual for my '91 GL.  Can anyone describe, or
point me to info on exactly what the four different heat/vent slider
controls do?  And how the air conditioning is involved (the two knobs to
the right of the radio).  Looks like A/C is completely independent of
the heat/vent system, involving only the overhead duct in the center of
the van.

I don't find that the meanings of all of the iconic symbols on the
sliders are immediately obvious.

Allan
--
1991 Vanagon GL