F50 = Motor Stalled
The motor is stalled first thing to check is that there is nothing stopping the motor in between the tubs under the unit at the stater motor. If every thing check ok the rps sensor will most likely be at fault. This is located under the unit to the right of the stator motor. Im sure you have researched this and have found this to be a common issue! The manufacture has come out with a kit for the f-50 f-51 error code. The kit is a new control board,wire harness,and sensor.