It might be a lemon pip!
Food debris can collect under the impeller blade that removes the water and cause it to stall.
Bail out the water right down to the bottom - remove the filters and at the very bottom of the sump you will find the drain pump impeller under a plastic cover held in place by a single Torx screw.
Remove the cover and clear the debris - tweezers might help.
The impeller should move with a bit of magnetic resistance.
Of course it might be a defective pump motor or control electronics - hope that it's just a lemon pip.
Good Luck...
January 2016
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