Our LG dishwasher was getting the same LE error code. It turned out to be a simple fix, just a broken wire. To fix it, first remove all the screws along the perimeter inside the door. The front of door will come off, there will be some glue holding the insulation inside, just pull it off. You'll see a bunch of wire at the bottom of the door running through a white plastic guide. Just above that, a small grey wire and a blue thicker wire were kind of jammed into the tar-like coating of the inner door on ours. The thin grey wire was broken, the blue one slightly cut. The white plastic guide unclips to get access to both halfs of the wire. Just strip and solder the broken wire, wrap in some tape. Simple fix. I can't really see what would cause this problem. Hope this helps.