Nearly new dishwasher, keeps going into drain mode. We've removed the drain pump cover and checked for debris, impeller is moving freely. Display showed an error message "Watertap", but holding in the start button for 3 seconds would not cancel the cycle. We had to throw the circuit breaker to get it to stop the intermittent draining. Turned the breaker back on, and now the display is dead, none of the buttons work, but the intermittent draining continues, even with the door open. We can't keep the breaker thrown because other essentials are on the same circuit. Is there any way to "kill" the beast until we can get a repairman out, short of pulling the unit out to disconnect the power physically?