[s-cars] Heat/Cooling Malfunction

[Jerry Scott]

My 93 had the same symptoms and I fixed it with a minor linkage 
adjustment.  I found the linkage on the passenger side to bind on other 
parts of the linkage.  This required filing down a sharp corner on one 
of the plastic arms.  I have a write-up if interested.
Jerry

David Giannandrea wrote:

>When my heater exhibited the same problem it turned out to be a connection
>rod between the motor and the fresh air flap.
>
>VAG-COM turned up the known codes for non-euro cars (there are 2 codes,
>always on for my 93 S4, see manual or me again). Anyway, no other fault
>codes that I could work with. No information from the A/C control head's
>diagnostic mode indicated anything either. Apparently no position sensor
>(refer to the 2 always on codes) on the flap, hence no diagnostic of motor
>position vs flap position.
>
>You will have to take out the windshield wipers, easy. In my case it was a
>connection rod on the drivers side, but there is more linkage on the
>passenger side too... you will see it when you get there.
>
>I just ordered the part yesterday. Wait a couple days and I will be able to
>give you the part number. I also have a FAX page of from the parts fiche if
>you need that.
>
>David
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