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ACC fan speed controller overheating
Posted by Andrew W (more from Andrew W) on Tue, 21 Jan 2003 21:16:37
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I was on my 2nd ventilation fan control unit for my '96 SET when earlier this winter the fan stopped blowing. Two years ago I replaced it with information from TSB 871-1847 (Saab redesigned the unit to cool better). So I figured it had gone bad again. Ordered and installed new unit -- same problem. (The control module screws into the AC evaporator housing near the passenger side of the cabin.)
I know it's the fan speed module overheating because the part burns your skin if you touch it after the fan dies. But it never overheats if I manually set the speed to highest or second highest level. Anything slower and it overheats.
At any rate, I believe the ventilation fan motor feeds back higher voltage to the control module at lower speeds. My best guess is that the fan motor is the culprit, but does anyone have any other guesses? I've never had a motor go bad on me.
THANKS!
Andy
1996 900 SET 2.0 104,000 miles
posted by 68.74.6...
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