This washer design which came out in 2010, has been very problematic. The first thing I would check is the nut that holds the drive pulley. These have been coming loose which causes the pulley to drop which causes problems with the splutch engaging for spin mode. You have to tilt the machine to access underneath to get to most components. If the nut is loose, apply loctite blue 242 threadlocker before retightening. The shift actuator which shifts between agitate and spin mode is a high failure item as well as the lid lock. Check that all connections are fully plugged in. This includes at the motor, shift actuator, pump, capacitor and control unit behind the control panel. There have been many reports of broken wires and faulty connections. Due to the many problems with this design, a website was set up with detailed information including service manual. The same manual should be inside the front of the washer cabinet.

Eric