A/C /Heater Vents on 1994 Lincoln Mark VIII

The A/C/Heater Vents are not working. The air is coming through the defroster vents near windshield and on the floor but not through the A/C vents. What is the problem.

Asked by for the 1994 Lincoln Mark VIII
What you have is a air door actuator (inside the heater housing) that is not directing the air flow to the a/c vents. Have a shop check it out's not so easy to just DIY
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