You Tube to the rescue! Several other Great Souls videoed the entire repair that had the same problem I had. Fingers crossed I ordered the sensor and the install is very easy. Just like the video. I've run several cycles through now and the dishes have never been cleaner. Out of curiosity I cut or smashed the old sensor apart and there was two very small blue coated metal tabs. Maybe micro circuit of some kind. Quickly called Samsung and cancelled my repair appointment. Good Luck! Ronnie in Seattle,WA