Call them back!
I assume that he sent you the parts for the new version door switch assembly or He used the wrong ML# when looking up the parts. The ML# is the material list they used for each version of the machine over the years. When they make changes to a machine, like updating the door switch, they issue whats called a TSB (technical service bulletin) to each technician and parts person. Nowadays I think its all computer based. and they dont issue the paper manuals that they used to issue. It was much easier to track way back when. not so much today though.

Hope that helps.