The water turbine used on some of the dishwashers is designed to eliminate the
dependency on the pressure switch for filling. The unit is fitted in the fill
line of the machine and works by the rotation of the turbine as water flows over it.
A fixed reed switch registers the number rotations the turbine makes by counting the
passing of a magnet fitted to the impeller. It can also act as an over flow preventative
because it counts and regulates the amount of water entering the machine. The pressure
switch will still be used if there is a fault registered with the turbine and a turbine
fault will display at the end of the cycle.
