Only one of three cycles would complete properly

The opened the control panel using a Torx screwdriver(3 screws)
The timer was a sealed plastic unit.
It took a little time to figure out how to remove the knob on the front. It required the removal of a metal cover to the outer knob that was holding everything together. It would have been nice to know that a head of time. I almost broke the knobs trying to "pull" them off.
After that, I simply removed the multipin plug and installed the new unit.
One small problem that you do not want to repeat. The water level switch has a vacuum hose attached. Make sure you attach it if it falls off. Failure will result in several extra gallons of water flowing onto your floor before you realize the water didn't shut off automatically. I love learning from failure. At least the floor got cleaned.