05 explorer, driver side a/c
 

I'm having some A/C problems with my 05 limited explorer. It has the climate control and the A/C doesn't work on the drivers side. If I switch it to dual it will blow cold on the passanger, and the rear air will also blow cold. The air for the second row doesn't blow cold either, but I think that is because it goes off of the drivers controls. I took it to the dealership where I got it they said it was a/c blower needed to be replaced and they wanted $600 to fix it. It just doesn't make sence to me that it is a blower problem if it blows on the passanger side and rear air.

Does anyone have any input on this? I would apreciate the help. If it is the blower, I can replace it. All I will need is a diagram of how to take the dash off. I am just scepticle that it is the blower.