I had the same problem, SAMSUNG did not want to tell me how to fix so I jumped in with research I found that after you remove the power supply, i.e. plug, 1) you need to remove the dishwasher and turn it upside down. 2) There is a white sensor tray; 12x12 approx. ont he bottom held in with two screws, remove the screws and use a flat head screwdrider to undo the clips holding the tray in place. 3) Dry the tray and sensor tips with a towel and replace the tray. Bammmm, you have just fixed the LE code error. Why is it so hard for SAMSUNG to tell us this.
SAMSUNGHATR, February 2010