We have a older model kenmore elite dishwasher model 665 15969990 that doesn't have the same buttons for running diagnostics or resetting - anyone know the code for this model?

See if this helps: https://dl.dropboxusercontent.com/u/8010163/Kenmore_Ultrawash_Dishwasher.pdf
Step one: Hold "Normal Wash" and "Start" together for 10 sec.
Step two: Press "Air Dry" and "High Temp Scrub" back and forth until "Quick Rinse" button turns on solid.
Step three: Press "Normal Wash" again followed by "Start."
Step four: Let machine run until you see green "Clean" light come on.
Step five: Press "Normal Wash" again and "Start" again.