No heat or climate control '89 200TQ

["Lamb, Bill" <Bill_Lamb@kne.com>]

Last week, winter revisited Colorado's Frontal
Range. On my '89 200TQ, the climate control and heat however
went south and stayed there.  No fan on any setting.
Barely any heat out of the vents, probably from
conduction.  Anyway, I suspect a bad vacuum pump
but where do I start?  I have the Bentley manuals but
after reviewing the section on climate control, I was
overwhelmed.  Anybody care to shed some light or
heat on this subject.  Is this a common failure?  I
fixed the broken flapper spring a couple years ago.
Thanks in advance.  Why do German cars always age ungracefully
in electrics?

Bill

seat warmers on full and thank goodness for
RainX.