Asko dishwasher did not finish complete washing cycle and now has a very low humming sound. It will not start washing cycle. I have turned it on and off but after I turn it back on humming sound continues.

Some wash water may have gotten into the bottom pan area below the wash tub. If water has overflowed from the tub into the bottom pan, the drain pump will activate and remain active until water has been removed from the bottom pan. To check for this, the lower front panels will need to be removed. With power turned off at the breaker, a wet-vac can be used to remove water from the bottom pan. If there was water there, check the door seals, door closure and make sure the drain hose has a high-drain loop. If the drain is shared with the kitchen sink, it may simply have backed up into the dishwasher through the drain hose when a full sink was emptied. The best drain system is for the dishwasher to have its own separate drain.