Re: 5ktq Lack of air Flow

[Tony Lum <tlum@flash.net>]

At 11:28 AM 5/7/98 -0400, you wrote:
>Hmmm, I fixed the recirculation flap spring and the misting problems I was
having during the Winter were cured. Now the weather is getting hotter I
guess I have to try and figure out why there is zero air flow out of any
the large vertically mounted dash board vents. 
>
>Doesn't matter whether the systems is set to Bi, or auto I only get cool
air coming out of the vents at the base of the windshield? Any suggestions
what to look at or how to fix this would be greatfully received!
>
>Thanks and regards, Mike
> 
Mike, this sounds like a classic symptom of a vacuum leak, either from the
recirc vacuum motor (you would have noticed this while fixing the spring)
or from the control solenoids in the A/C programmer (the one with the temp
flap cable attached).  You can get a spare for about $125 or rebuild yours
if the electronics are ok.  You'll need a used programmer from a junked car
(should be available for next to nothing, think I paid $8 for it) and a
hand vacuum pump.  Disconnect vacuum hoses from solenoids and apply vacuum
from hand pump.  The ones that don't hold vacuum are bad/leaking.  Test the
solenoids from the junk programmer-probably the same ones will be bad, but
you will need only 2 typically and you'll find 2 good ones.  Unsolder the
bad, replace with the good, re-attach vacuum hoses, re-install unit and
you'll find nice cold air coming out the center outlets!  Worked for me :)

HTH,

-Tony
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Tony Lum                                  1987 5000CS Turbo Quattro
Berkeley, California, U.S.A.                 1985 4000CS Quattro
Audi Owner/Driver/Mechanic by Necessity ;^)   1980 5000S  Sedan
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