There is a thread here that concluded the part (link to pic below) (part number DD97-00256A) is the problem, that many have this issue, I do too now and am out of the normal warranty period.
Sadly in my research of repair places I have been assured by all of them Samsung makes the worst dishwasher on the market, live and learn.
I wonder what it is gonna cost me to replace this part, I have a local repair place coming in 2 weeks. Even though my appliance is only 2 1/2 years old, purchased at Costco, I am actually thinking of just junking it and getting a Bosch which I am told is the best by far.
If I knew what this was gonna cost before I paid them $115 to tell me, I might just do that, anybody know?