Josef G Sheboygan , WI November 07, 2018 Appliance: Maytag Washer MVWB850YW1 Maytag Washer Mvwb850yw1 / : F51 error code. How to replace Rotor Position Sensor. I replaced the rps, rotor position sensor. After watching the YouTube video, made by appliancepartspro.com, I decided it was an easy fix. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes