Don't have a tech 2. I'll look at the motors when I change temp.Do you have a Tech II? Have you reassembled the passenger side?
If the motor is still visible, you could try changing the temp settings and see what the motor does.
No, state of A/C charge won't show up as blend door errors in ACC anyway. And it manifests itself as insufficient cooling on the driver's side in hot weather.
Insufficient cooling on the driver's side is exactly what happens in summer!