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Re: Cabin fan says, "only 1 speed through defrost vents
Posted by Geza in CA [Email] (more from Geza in CA) on Wed, 23 Mar 2005 18:40:20
In Reply to: Cabin fan says, "only 1 speed through defrost vents", JoMoWeb, Wed, 23 Mar 2005 18:06:47
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I've been dealing with a similar problem in my '97 CSE, and though the systems are different, they work on similar principles.
If you're getting heat only, it means that there's a problem with the mixer flap. This is a piece of plastic that is supposed to mix cold with hot air in the amount you determine by pushing the buttons on the dash. It's controlled by a servo motor that's wired to the ACC unit. There are a number of places this can fail--the ACC unit itself, wires, connections, the motor itself, the flap, etc. You might start by doing a search on "mixer flap."
The same sort of system controls the distribution of the air, and it sounds like yours isn't working. Again, do a search on "distribution flap."
The speed of the fan is something different, and I'll defer to others on that one.
You might try to eliminate the problem of a bad ACC unit by switching out yours with a known good one. If that's the problem, you can find used ones on Ebay for pretty cheap. If it is, also, you just saved yourself a lot of time and effort. I'd start there.
posted by 64.173.4...
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