We have a Frigidaire front loading washer (ATF6000ESO) that keeps shutting off automatically. Usually before it even starts, but some times during washing. Lights just go off and unit either does not even start or stops in the middle of a washing cycle. I have tried shutting off main power for 30-min. and it still happens. I need to determine if this is a sensor, switch, or the main control panel. Any ideas would be helpful. Thanks.