2003 Sable blend door actuator not working

I recently had a problem with the system blowing cold air. Determined it to be the blend door, manually actuated it and it heated right up, but the new blend door does not even attempt to turn. Fuses inside the car are all good. Is there anything else I can test?
I could easily tie the blend door in the heat position for the winter but would really like to fix it while I have it all torn apart.

Moving this to the Sable section for you, leaving a redirect here.