If a dishwasher does not fill with water, it may be possible to diagnose and fix the problem without calling a repair man. Common causes of water not filling in a dishwasher include issues with the water inlet valve, float, door switch or drain valve.
To troubleshoot a dishwasher without calling a repair man, first source the cause of the problem. Check the connections on the water inlet valve located behind the lower access panel. If this isn't the cause, check the float located at the bottom of the dishwasher tub. If there is no issue with the float, check that the door switch is working correctly and the drain valve is functioning without problem. Once the source of the issue has been located, refer to the user manual for instructions on how to replace the broken part.