Product review (4 stars): Samsung DW80F600UTS Blinking Smart Auto and Normal
I learned from a quick internet search that this meant the ECS sensor (high temp sensor) was throwing a code which basically paralyzed the dishwasher. I have taken this dishwasher apart a few times already and had to clean this sensor because it was covered in gunk.

I am very happy I found this sensor on Amazon Prime, although it was the highest priced out of all the ones I found online, after shipping and knowing I'll get it in 2 days I went with Amazon.

I am only giving 4 stars because it doesn't come with a replacement O-ring seal. I had to take the one off the bad one and reuse it because I didn't have a spare--make sure you put the seal on!!! I made the dumb mistake of not even noticing and put the whole thing back together only to have it blink Heavy and make a sucking noice - turns out that is a safety feature where it senses a leak (the water was leaking out the new sensor b/c I forgot seal) and crippled the dishwasher once again. I had to take the whole thing back out--I actually put a little bit of silicone around the outside of sensor (not inside the dishwasher side) to make sure it didn't leak because I didn't know how great re-using an o-ring seal really is.

If anyone has any questions on replacing this let me know--its actually very easy. Disconnect the hot water line, and the waste water line, hopefully you can leave the electric hooked up (turn off breaker!) pull dishwasher out, flip onto its front so you can get at the bottom. There are 2 screws that hold up a panel, remove panel, and you will see this the butt of this sensor sticking out the bottom. Disconnect from the control, and give this sensor a quarter turn and it should pop right out. Reconnect old one and make sure you have that o-ring on the new one, and pop back in. Reconnect everything. Done.