Date: Thu, 28 Jun 2007 02:49:33 GMT
From: "bozo" <bozonospam.net>
Subject: Re: strange noise in dash when turning


It is likely a plugged evaporator housing drain - the trapped water sloshes on turns and can 'bother' the fan - which makes the noise and can eventually over-stress the fan, too. A good site is quasimotors saab 9000 site - in the faq section, there's a part about the ac evap drain with a pic of the drain outlet (of course it is under the car) - site is: quasimotors.com - go to the faq section and then the ac evap drain section and click on the pic link to see the outlet ALSO - you don't need to stick anything in the opening of the cabin temp sensor to see if it is running (could be costly for you to do that) - just take a smallish section of single ply toilet or kleenex type tissue and rest it against the cabin sensor grille - the fan sucks in so if it is working, it will hold the tissue in place. Over time, the little temp sensor bulb in there can acquire a "helmet" of crud and that can affect sensor accuracy - that can be resolved with a spritz of compressed air from a photo/computer type air-blast cleaner can Rick "Steve B." <nonenospam.com> wrote in message news:2un583h5p0ge7n9ccac46b1dl3pd815lf3nospamcom... > On Wed, 27 Jun 2007 20:35:26 GMT, "mdb" <milo_dhueynospamo.com> wrote: > >>I have a 97 9000 Aero and have recently noticed a new noise. I'm wondering >>if it might be indicative of a low level of freon in the ac system. It >>happens when I turn hard, to the right or left, while the car is moving. >>There is a squeaking, whooshing sound. Almost like liquid shifting from >>one >>side to another. I suspected the cabin temp sensor so removed that last >>weekend and cleaned it. As a further test, I stuck a small shaft into the >>cabin temp sensor to stop that fan. Still got the noise when turning the >>car. Less noticeable on gentler turns. No strange sounds at all when >>driving >>straight ahead or hard stopping. >> >>Any ideas what I might be hearing. >> >>Thanks. >> >>Michael >> > > The refrigerant in the a/c system won't make noise when you turn > corners. It is a gas under pressure and doesn't really move around > because of turning forces. > > You might be close to the culprit though.. Sometimes the condensate > drain for the a/c system clogs up and the plenum starts to fill with > water. I had an old Cadi that would dump about a gallon of ice water > on your feet during a turn when it clogged. After a couple of times > of this happening I learned to keep that drain clear! > > I don't know exactly where the drain is on your hose but it should be > coming out the passenger side firewall area. > > Steve B.

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