separate ACC recirculation motor? - Saab 9-3SS Bulletin Board - Saabnet.com
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separate ACC recirculation motor?
Posted by Aero'ed (more from Aero'ed) on Sun, 14 Mar 2010 11:32:40
In Reply to: Re: noise from dash when first opening door, saabdoc, Sat, 13 Mar 2010 17:25:05
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I haven't a diagram of the 9-4's ACC system, but I would guess that is only a single cabin fan.
The reason your fan is louder when you switch from outside/ventilation air to recirculation is that you're hearing the return (from cabin) air into the fan. In recirc, you hear both the inlet and outlet of the fan, in ventilation mode you only hear the outlet. The inlet to the fan is air directed from outside the car.
I'm not saying the noise I'm hearing COULDN'T be the cabin fan.
I guess I could pull the fuse for the cabin fan, see if the sound goes away, to determine if that is the source.
If so, I guess the question is: Why is it running for 5 seconds (or so) every time the door is opened?
Ed
2004 9-3 Aero
1999 SE(6) SW
posted by 205.196.151...
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