To access the inlet valve remove the front panel located beneath the door. The panel is usually held in place with two screws either above or below the panel. It may be necessary to first open the door to the dishwasher to reach the screws over the panel, then close the door to remove the panel.
Before replacing the water inlet valve, unplug the dishwasher or shut off the power at the fuse box or breaker panel to avoid an electrical shock hazard.
The water inlet valve can be identified by the water hoses connected to it. One hose will lead from the valve to the pump/motor assembly in the center of the dishwasher. Before disconnecting the hoses, turn off the water supply, which is usually located under the sink. If you are unsure about the location of the water supply, turn off the water supply to the house at the main valve. Place a small pan under the valve to catch the water that will spill out. Disconnect the hoses. The water supply probably screws on to the valve like a garden hose, while the outbound house is held in place with a clamp.