Before testing the float assembly, unplug
the dishwasher or shut off the power at the fuse
box or breaker
panel to avoid an electrical shock hazard.
The float is located inside the
dishwasher in the tub. As water fills the tub, the water lifts
the float. When the float rises to a certain level it triggers
the float switch which in turn turns off the water flow. In some
dishwashers, the float switch is only used to prevent overfilling
and the amount of water is regulated by the timer.
To inspect the float assembly, open
the dishwasher and remove the bottom rack. Remove the float cover
(if any; it can be identified by the fact that the cover does
not move up and down). The cover may snap in place or it may be
fastened in place with a screw.
Lift and drop the float several
times. It should move freely. If the float sticks, it may prevent
the dishwasher from filling or draining properly. Remove the float
and look for obstructions that may interfere with its free movement.
The float usually snaps in place. If it does not come off with
a small force, it may have to be disconnected from the float
switch first.
Replace the float and float cover.
If you found no obstructions and the problem persists, test the
float switch.
Before testing the float assembly, unplug
the dishwasher or shut off the power at the 
