Re: HVAC unit problem:

[John Karasaki <johkar@teleport.com>]

At 09:42 AM 3/21/96 -0500, you wrote:
>Hi, I'm still trying to iron out some of the little "features" that came 
>with my '86 5KCST.  Here's the next one (and perhaps the most annoying):
>
>The blower in the cabin is always on.  If I press "off" on the climate 
>control center, it seems to adjust it so that more air is blowing at the 
>windshield (defroster) but the motor doesn't turn off.  Additionally, the 
>"high" and "lo" settings have NO effect.  I think that the blower is 
>probably on high, because it is quite noisy.  Adjusting the temp. 
>settings seems to work, as I CAN stay warm or cool.  But the damn fan 
>won't shut off.
>
>Unplugging the HVAC unit from the wiring harness didn't solve the 
>problem.  I thought that unplugging it might show if the unit was 
>defective or if it was in fact something else.  No luck -- the fan was 
>still on. I plugged it back in.
>
>So, does anyone know what the source of my trouble might be?  Where can I 
>start looking/probing?  What do you think is broken, and how can I fix 
>it?  Thanks for any suggestions.
>
>---
> -Preston Brown
>  preston.brown@yale.edu
>
This is the blower control module guaranteed.  I replaced the one in our
5kcst (now sold) a few years ago with one from the wrecking yard.  The used
one lasted 2 years then quit.  I then replaced it with a new one from PAP
for $60 (part # 443 820 523 A)... no more problems.  This is a five minute
or less fix.  The blower control module is held on by three phillips screws
and in located under the big piece of plastic in the cowl area under the
hood of the car.  E-mail me direct if you need more info.

Regards,

John Karasaki

The Karasaki's, proud owners of AUDI automobiles

1981 Coupe
1982 TQC
1984 5000S Wagon
1990 V8