I have a Kenmore 13449K900 dishwasher 5 years old, its stuck on light wash cycle, cannot select any other options, it seems to be working fine on light duty however I want to know why.

Here are instructions from this site: https://dl.dropboxusercontent.com/u/...t%20codes.docx
https://dl.dropboxusercontent.com/u/...set_Codes.docx