Called an appliance repair company to make the repairs. They replaced the keypad twice and that did not fix the problem. They recommended us to buy a new range, as it would be cheaper than replacing the controller.
I let that sink in and shopped for a new range.
Found AppliancePartsPros while the installers turned the install into a science project.
Ordered the controller and keypad, installed the parts and had cornbread for supper.
Saved about $600 by taking the task on.
The difficulty level indicator on the parts page was a great help, with my confidence.