Turn off the electrical power from your Bosch dishwasher from the kitchen circuit breaker.
Turn off the water supply valve to the dishwasher from underneath your sink by turning the handle clockwise.
Remove the screws from the lower kickplate panel, and lift the panel to fully remove it from the dishwasher.
Locate the float switch assembly in the bottom center of the dishwasher, below the spray arm.
Remove the bolts connected to the float switch assembly using an adjustable wrench.
Disconnect the actuator lever switch connected to the float assembly. Lift the assembly out of the dishwasher.
Insert the new float switch assembly into the same position, and reconnect the actuator lever switch.
Reinsert the bolts into the float switch assembly. Place the lower kickplate panel back onto the dishwasher and reinsert the screws into the panel.
Turn the water supply valve back on, and turn the power supply back on from the circuit breaker.