The dishwasher, greater than 50% of the time, won't drain on the last cycle of the wash. (It seems to be getting worse)

On this dishwasher you can start it and press reset and the water should drain. When the water is left in the dishwasher from the previous evening and I perform this reset in the morning the water drains out. However, if I perform this reset right after washing dishes and noticing the water, it won't drain.

Therefore, the problem seems to be temperature (or humidity) releated. Any ideas on what part may be the problem?

I have been checking the drain line periodically. It just doesn' want to drain on the last cycle - the initial rinse and the wash seem to drain OK each time.

That seems to describe the problem. When you suggest the "control board" I am going to take it you mean the "Control Switch assembly" and not the "Sequencer Switch". It is the only 2 electronic parts that I notice in the diagram for the dishwasher.