Product review (5 stars): Easy, cheap, 20-minute repair for the "LE" error code and a "growling" tub that won't spin properly
This part is exactly what I needed to fix my LG WM2010CW front-load washer when it started making a "growling" noise and struggled to rotate the tub. It also repeatedly rinsed and drained, and cycles got stuck without finishing. A quick Google search led me to suspect the rotor position sensor had failed, even though my washer didn't display the classic "LE" error code until a few days later.

It is a very easy repair, and there is a great video (https://www.youtube.com/watch?v=Hc8lM3B05n0) from AppliancePartPros on how to replace it with only a socket set and screwdriver. You remove the back panel, unscrew and pull off the rotor assembly, then just swap the new sensor for the old one. It snaps on easily and is almost impossible to screw up. Save yourself the service call and try replacing this yourself first. My washer is back to working like new for less than $20 and 20 minutes of work.