Ray M Farr West , UT May 31, 2021 Appliance: LG Washer WM3875HVCA Lg Washer Wm3875hvca: Stopped agitating/spinning. How to replace Washer Rotor Position Sensor Assembly. Replaced Rotor Position Sensor as most likely part. Extremely easy process after watching the video. Maybe 30 minutes max if you include hooking the washer back up for it's test run. I did need someone to hold the drum for me to remove (and again to install) the main bolt, but I rate this as "EASY". And we've run at least 40 loads through with no problems. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes