5+ yrs old Bosch dishwasher won't advance cycles.

One thing to try is to turn off the circuit for a while and see if that helps reboot the electronics.

Did that. Didn't help. Unit is a model SHU5302 UC/U12 if that helps anyone.

According to tgeorge :

We have a miele - mostly mechanical control. While this may be completely inapplicable to your unit, we had a similar problem. It simply wouldn't rotate the timer knob on its own.

Opening up the unit, expecting something really subtle that would be a bear to diagnose, I was surprised to find that one of the wiring connectors to the timer housing had vibrated off and was hanging loose. And that was the motor drive power...

Reattached with a tiewrap so it couldn't recur. Works fine.

I've got a 13+ year old Bosch sitting in my back yard waiting for a new home, but it has the same problem.. I would come home and find it had been running all day long or perhaps ~20 hours.. A little fiddling with the controls would unstick it. In my case, we had a home warranty company come out and replace all of the thermostats since there were no other parts they could find faulty. After that, it would still stick once in a while and since it was getting fairly old anyway, we replaced it with a new Miele after the home warranty company refused to change out the timer (mechanical) and wondered why I didn't want to renew their annual contract.. Go figure..

On a different note, we're VERY happy with out Miele unit which is a nice step up from the Bosch (which was also good, but a bit old). Having 3 racks is a great feature that I'd never give up in a second!