Thanks It does explain the symptoms Seems most likely a leaking vacuum
pod.will check it , mostly behind the centre panel
mak
My guess is that one of the pods has a vacuum leak, and when the
ACC goes to actuate it the vacuum leaks away and the system defaults
to the defrost vent pattern. Maybe the footwell pod? Use a MityVac
on the lines coming out of the electric vacuum manifold behind the
ACC panel. (Or is it behind the glove box?)
-- Jim
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