Nordyne Serial Number Question

I’ve got a Nordyne Air Conditioner and now it broke down so went look for the serial number and the sticker which had it is gone… :mad:

Where else is the serial number located? Or how would I be able to tell?

More information would be help full , What type split or window? how old? ,
Some times it is cheaper to but new !

try here > Roy Sr.
http://www.nortek-inc.com/nordyneP.htm

Its 6 years old and whats the diffrence in split and window? Its got air ducts so im guessing its not window.

Can anyone help?