Testing Defrost Flap vacuum servo?

[amalventano@sc.rr.com (Allyn)]

get a vacuum test rig (like $20 at discount)
it should hold vacuum indefinitely, or at least for a good while
usually when they go, they tear, so its obvious that they wont hold any vacuum
Al

----- Original Message ----- 
From: "PK Commercial" <pkcommercial@mindspring.com>
To: "Scirocco Mailing List" <scirocco-l@scirocco.org>
Sent: Monday, October 14, 2002 1:18 PM
Subject: Testing Defrost Flap vacuum servo?


> I notice that I only get partial airflow regardless of where I have the
> control head set.  Also, I can visibly see that the defrost flap is not
> closing or opening all the way.  I can hear a vacuum leak (hiss) whenever I
> have it set to A/C positions, Vent, or Floor heat settings.
> 
> My guess is that the vacuum servo for the defrost flap is bad.  I am not
> sure how to test the servo itself.  Any specs for it holding vacuum or other
> procedures?  Or any other ideas what the problem could be if not that servo?
> 
> Thanks,
> Phil Kerschner
> 
> 
> 
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