Steve B Lascassas , TN December 06, 2016 Samsung pos dishwasher with smart auto and heavy light blinking We have two dishwashers and they are both two years old. One has worked fine but this is the third time I've had to work on this one. Every time, it's the same error. The first two times, I was able to change the $43 ECS sensor and fix the problem. This is crazy in itself as the sensor was less than four months old. This time, I replaced the same sensor and got the error anyway. Having two dishwashers allowed me to remove the mother board from the one that was working and install it on the one that wasn't to see if that was the problem, and it was. I ordered the new mother board and swapped it out and now they both work.............again............temporarily. We have five Samsung appliance all bought new two years ago. Every one of them except the stove has required at least two repairs each. This part came really fast and was what I needed. I like this site and company. I don't like Samsung. I'm hoping AppliancePartsPros will also sell replacement parts for the dishwashers I replace these two with! 11 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes