Our LG LDF6920ST dishwasher has started making a whistling noise while it operates. We have used it less than 1 year and it was previously very quiet. Everything else is working fine; dishes are clean and no other issues are apparent. Some research indicates the chopper blade is a bad design but I cannot locate a replacement. There is a you tube video of the same model making the same noise so it must be a common problem.
Can anyone help me with parts and repair?