No able to change position of air flow from dash to defrost

Good evening,

The mode door control is vacuum operated. The control head sends a vacuum to the actuator to move it to the correct position.

I attached the procedure for replacing the actuator but you also need to verify the vacuum to the actuator for it to work.

https://www.2carpros.com/articles/replace-blend-door-motor

Roy

REMOVAL PROCEDURE

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1. Remove the left instrument panel insulator.
2. Remove the instrument panel knee bolster bracket.
3. Disconnect the vacuum lines from the mode actuator.

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4. Carefully rotate the mode actuator toward the front of the vehicle until the actuator is released from the mounting pins on the HVAC module.

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5. Disconnect the vacuum actuator pushrod and remove the actuator.