I am assuming that the water will cut off if you shut off the machine or unplug it.

Before buying parts first check to make sure the plastic tube from the water pressure switch is not obstructed. Take out the two screws that hold the console to the cabinet and you will see the water pressure level switch and take off the plastic tube connected to it and blow it out.

If this does not fix the problem, here is the part

Part number: AP3890867