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AC Blower motor rpm decreases with acceleration & dash vents don't work S90-V90 1998

posted by  doudah on  Thu Apr 7 05:54 CST 2005
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last visit: Fri Aug 16 21:20 CST 2013
[RELATED]

When in heat mode, blower operates normally - vents operate normally but (sometimes!!!) when air is selected, dash vents fail to open and blower will not go to max speed whether manual speed selected or automatic speed.
Other times the vents operate normally and the blower goes to full speed (car is hot inside) but the blower speed slows down during normal acceleration (don't accelerate hard since my fuel is 2.60/gal these days) and speeds up again when not accelerating.
Thought maybe an vacuum leak only when AC is selected but normal operating blows that away.
Any ideas from anyone?





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