Sounds like one of your servo motors which actuate the vent is malfunctioning.
This photo is from a 993, but I believe the configurations are very similar.
Also check this site as posted by C2Targa, in the Fan remains on thread.
http://www.porschehvac.bergvill.com/
The search function is your friend...Take it for a test drive.
HTH
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If it flows, it goes. If its smooth, it moves. Any questions?
96 993 C2 (Current)
87 911 Factory Turbo-Look Cab (Sold)
85 911 Factory Turbo-Look Targa (Gone)
Last edited by Nine9six; 04-03-2013 at 07:54 AM..
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