Re: climate control

[Orin Eman <orin@wolfenet.com>]

Here's another climate control gremlin for you.

Symptom:

Put it on Auto/Lo.  Get cold air out of the center vents for a few
seconds then they close again.  Switch to Econ and get a brief
blast of cold air (until the evaporator warms up).

Diagnosis on my car:

The bracket that holds the vacuum motor which drives the fresh air/
recirculation flaps broke.  The hose feeding the vacuum motor came
off and was lying in the bottom of the evaporator housing...
When selecting Auto/Lo, the controller opened the center vents
and the recirc door.  I guess there was enough vacuum in the
resevoir to open the center vents for a little while .

Fix:

(Temporary.) Disconnect the vacuum line to the offending vacuum motor
and cap the Y-connection.  At least the center vents stay open,
even though I'm now fresh air only.

(Long Term.) There is a repair kit!!!  A metal braket for the vacuum
motor.  Thanks to Scott Mockry for this information.  Part # is
200 271 200 and Linda has (had) one.  We'll see how this works...

> A few people lately have posted with problems in the climate control (cc)
> system in the late '80s early '90s audis.  I forget who, but one lister stated
> that lately his car stopped blowing cool air through the center vents, and
> only blew through the upper and lower (and the dealer wanted to recharge the
> system freon).