I haven't been in there myself, but here's what the Ford manual has to say regarding the blend door motor:
The A/C electronic door actuator motor is located on top of the A/C evaporator housing assembly and controls A/C air temperature control door movement on command from the control assembly. Internally, an electronic circuit accepts commands from the control head and positions the A/C air temperature control door by electric motor. An integral potentiometer feeds blend door position information back to the control head.
Removal:
1. Disconnect battery ground cable.
2. Loosen instrument panel and pull back from cowl.
(Ouch)
3. Remove A/C electronic door actuator motor electrical connector from bracket on A/C evaporator housing.
Remove three A/C electronic door actuator motor retaining screws.
5. Lift actuator vertically approximately 12mm (1/2 inch) to disengage it from bracket and actuator shaft, then pull actuator back toward passenger compartment.
NOTE: The mounting bracket remains in place on the A/C evaporator housing.
Edit: I just noticed
this post in another section that gives you a little more info.
Hope this helps a bit!
<small>[ December 31, 2003, 03:55 PM: Message edited by: ckinart ]</small>