Nolazach, I have worked on commercial dishwashers. Completely different animal from domestic dishwashers. I have worked on American, Fagor, and a couple of other brands but not Jackson. I gave up working on them, your usually working on a floor that is dirty behind a counter of a restuarant or diner, and most of them are difficult to work on. Don't get started on it until you see if you can get parts. 0r help.
On another note, I'd get it straightened out with that appointment company. 25 a call for the same call is not right. Get on the phone and straighten that out. That's why I won't work with companies like that. 25 a call is alot to give to a company just getting you the work.