Yeah, I'm dealing with the same thing. I ordered a new actuator motor the other day, so hopefully when it comes in, it will be the answer to this problem.

Someone mentioned on another forum that if the passenger side blows cold and the driver side does not, this is a tell tale sign of low on freon. I don't know the system, so I can't say whether I believe it or not, but it doesn't really sound logical because that would mean there are two separate systems of sorts - one for each side of the car. The door thing makes sense to me, but a system for each side of the vehicle doesn't quite compute. Can anyone put any light on this for us?