When I tried to start my D/W today the door would not latch,. and no lights come on anywhere. However the plug is showing 115vac. Is there a solution to this problem? I am located in Montana in USA.

Try these suggestions,

Dishwasher Won't Latch - Repair Parts - RepairClinic.com (http://www.repairclinic.com/RepairHelp/How-To-Fix-A-Dishwasher/32---/Dishwasher-won-t-latch)

https://www.ameriproappliancerepair.com/four-easy-steps-to-repair-the-door-latch-on-your-whirlpool-dishwasher/