Error message

My Oasis He Washer keeps displaying the F51 Code Model 110.27082602, type 580 please help as this is driving me crazy.  The sears tech told me that I am not balancing my clothes properly.  I think their is more to this.  I have leveled the washer and tried balancing loads and nothing works.  HELP

F51 error code is beacause the computer board did not receive input from the motor on the bottom. Unplug the washer, pull the machine forward and tilt the machine back. On the bottom you will see a large white wheel with a silver allen screw in the middle I think it is a 6mm allen wrech that takes it off. Once you remove the screw and drop the white wheel, there will be a large coil of wires with 4 5/16 screws holding it on, remove these scres and drop the coils. On the right hand side you will see a connector with three wires , unplug it. Use sand paper or a scraping tool to clean all 3 male sides of the connectors. Reverse process to re-assemble.