Your pressure switch stops the water and allows it to start the next cycle. It's a switch either in the control panel or at the top of the tub with a small tube connected to it which goes down between the inner and outer tub. As the water level increases the air in the tube is compressed until there is enough pressure to "make the switch" stopping the water from filling. This tube can get clogged and the switch won't work. Remove the tube and clean it out. Blowing on the tube when it's still connected to the switch will make the switch if it's working and clear.


Part 22 in this DIAGRAM is your tube which connects to the pressure switch