I am hoping that I can get a bit of advice on this peculiar issue. Went for a drive yesterday and A/C was functioning perfectly. After lunch the A/C wouldn't blow out of the dash vents or the holes under the dash. It would only blow out of the defroster vents under the windshield no matter what setting the knob was in. Thank goodness that the knob still turned on the A/C otherwise we would have melted in the 95 degrees temp. Is this a mechanical linkage issue or something else? Thank you in advance.