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On my 98 Taurus, I only get strong air thru the defrost vents. Very weak thru the floor and top ones. My mechanic says he can’t figure out why. Any answer except find a different mechanic?

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Your HVAC has gone into "default" mode, which sends all output to the
defroster if the switching controls fail for any reason. This is done to
make sure the car is safe to drive, you can see out the windshield.

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First check for a vacuum leak to the HVAC controls or vacuum motors.

Jim O’Neill
Chino Autotech Inc.

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