A dishwasher that will not start may have lost power, have an unlatched door, an active delay-start setting, locked controls, or a water-supply problem. Begin with the panel and accessible checks; if a breaker trips, there is a burning smell, or water is near electrical connections, stop trying to restart it.
Check power and control-panel status
Confirm that the display or indicators respond and that there is no general outage. If the circuit has tripped, make at most one safe reset; if it trips again, leave it off and arrange service.
Close the door until the latch fully engages
A rack, utensil, or displaced gasket can keep the latch from engaging. Do not slam or force the door; remove the obstruction and make sure the latch moves freely.
Rule out control lock and delay start
Child lock, pause, or scheduled-start features can make the machine appear faulty. Cancel them according to the manual and wait for the panel to confirm the new state before pressing additional controls.
If it tries to start but no water enters, shift the diagnosis
Confirm that the accessible supply valve is open and the visible hose is not kinked. Humming without filling, a repeated error code, or a valve fault calls for service rather than opening the energized base.