Have a puzzle. This dishwasher has been working relatively fine until yesterday. It was a bit noisy because the plastic fan was ticking on the top of the motor frame. Other than that, though, worked fine.

Suddenly it will not pump water to wash or to drain. Disassembled from the spray tower down to the drain impeller and all looks fine. Seal is great, no leakage underneath. I didn't find much for debris, little bits of fiber here and there. Blew out through the drain and it is clear to the garbage disposal. The motor runs in the appropriate directions at the appropriate times, the water level looks right (just over the heating element), I would think if the motor were running too slow due to a starting relay problem, it should be growling and overheating. It doesn't seem to be. I don't understand what could suddenly happen that would cause it to not pump for wash or drain since it is two different impellers and pumps.

Any ideas????