@cmiller83
There is a motor in the washer see [https://www.searspartsdirect.com/model/5jsukwyyr4-001482/samsung-wf42h5200ap-a2-00-washer-parts|part #3-2 Tub and drum diagram]
The hall sensor is connected to the 4 pin white plug on the [https://www.manualslib.com/manual/1264207/Samsung-Wf42h5200ap.html?page=36#manual|inverter pcb] and here's a another link from the service manual that shows the possible causes for a [https://www.manualslib.com/manual/1264207/Samsung-Wf42h5200ap.html?page=21#manual|3E error code]