Disherwasher not filling all the way

Check first the filters on the inlet water line (both sides).
Then, if problem still exist - check that the inlet water valve works(it is an electromagnet valve, located at the pipe's entrance to the machine)).
If it doesn't work, test that it get power. In case it get power and doesn't work - You can easily open the valve and clean it (from scale or other dirt). Be aware you should disconnect the power cable from machine before doing it !!!!
Check as well for valve's coil resistance. In case you don't have a resistance measurement - you should replace it for a new one.
Let me know if you will need for further assistance.
Good luck

well i just bought 3 of these and thought that something was wrong with them.......well im still working on the problem....even had a tech come out........im a electrician myself.....but im not doing much to a brand new machine.....but this i have found and its a fact.....i plugged my meter into the socket that turns on the valve and it has power for 1 1/2 min only........so if you have a water pressure problem ........it want fill up in time .......now......i think thats ****....cause there should be a water float that will not let the machine start until it says that enough water has been put in........im still looking into this......but this machine has a timer that turns off the water......not a water level switch......