Date: Sat, 07 Sep 2002 17:41:34 GMT
From: "Jussi Aaltonen" <jussi.aaltonennopsamam.pp4.inet.fi>
Subject: Re: '93 9000CS - annoying in-dash ACC fan


> I think that this fan is for the ACC > cabin air sampling. Does anyone know: It's temperature sensor for cabin air. Operation principle is: Fan blows cabin air to heated wire and voltage drop (a function of temperature) in wire is measured. It works just like a hot wire air mass meter, but is measuring the temperature instead of the air mass flow. > 1 - how to remove the thing. I pried off the front cover plate (with the > slots that let the air in). Now what? Does the fan pull out (I can't see > how), or push into the dash for removal (and if so, how do you reach behind > to get the thing out!). It's removed same way than all other components in those slots. Pull out the plastic cover inbetween slots and you probably will be able to figure out how to continue. > 2 - why does it vibrate? Is it a problem with the mounting (which I > suspect, because if I jiggle the fan/hold it with a finger I can get it to > stop buzzzzzzzzzing) or the fan? Can it be fixed? It can not be fixed and it vibrates because bearings of the tiny electric motor are worn out. > 3 - If I need a new fan - does anyone know of a cheaper source than my local > Saab dealer? Don't know if there's cheaper sources... other sources there sure are. Sensor is a standard Bosch component, available nearly every shop selling spare parts for car electronics. It's also used in dozens of different car models. For example RS-Electronics (world wide company) has the sensor in their catalog. Their price is around EUR100 (~USD100), I think Saab spare is a bit more expensive. Jussi

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