My dishwasher washes AND rinses so much that it drains an 80 gl. hot water heater. I stopped in today after it had ran for 2 hours and 20 minutes! What in the heck is going on? ANY ideas? The water into it is hot enough…so that shouldn’t be the issue.
This sounds like a control board issue.
Thank you very much for your suggestion and input! 
I will look that up and see if it is something that my hubby can fix!
I could not find any info using the given model number.
Many newer units have a soil sensor perhaps this is not working correctly so it keeps trying to clean the dishes.
Sorry for the inconvenience everyone 
But the Mod. # is DP920PFQQ2. TRIED to do a load of dishes..forgot to watch the time..hehe..ran the washer for 2+ hours…OOPS~:p sigh…no hot water…again.