Re: Diagnosing '99 9-3 ACC all heat all the time - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Diagnosing '99 9-3 ACC all heat all the time
Posted by dregan [Email] (more from dregan) on Thu, 10 May 2007 12:30:28
In Reply to: Re: Diagnosing '99 9-3 ACC all heat all the time, Steve B. in MI, Wed, 25 Apr 2007 07:02:31
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Steve B is right. I just did this with mine, checked out the heater motor. It is exactly where he said it is. This is undoubtedly the problem, however there is a remote chance there is problems with your themocouples. I saw at least one thermocouple in one of my heater ducts. These allow the ACC to monitor cabin pressure. If your thermocouple is constantly telling your computer that it is freezing, the computer will always tell the motor to keep the flap open to the heater core. But, again, there is only a tiny chance this is the problem. Steve B is right.
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