Disconnect the electrical power from your Sears Kenmore dishwasher by turning it off from your kitchen circuit breaker.
Remove the four screws from the lower panel of the dishwasher using a Phillips screwdriver.
Lift up and remove the lower panel, then locate the thermostat under the dishwasher with an orange and white wire connected to it.
Disconnect the wires from the thermostat using needle nose pliers. Remove the screw from the bracket holding the thermostat in place.
Pull the thermostat out of the dishwasher. Insert the new thermostat into the same position within the dishwasher.
Reinsert the screw into the bracket to hold the thermostat in place, then reconnect the wires to the thermostat.
Place the lower panel back onto the dishwasher and reinsert the screws. Turn the electrical power back on from the kitchen circuit breaker.