[jsbihn]

2much
Yes, this sounds as if it is the actuator.
But, it could be a fault at various points.

You will have to check the switches, the fuse, the line, and the actuators themselves. Any one of these could be the issue. If I remember right, there are 1-2 switches top and bottom.

The plus side is you have A/C. And if for some reason you can find he reason why it wont switch, you can manual set it to be up top and then at least you have your A/C blowing on your face until you can find the culprit

Hope this helps