[HoosierDaddy]

I would think a short in the adapter would blow breaker at the supply post. Were you connected to 30 amp supply? Can u check the adapter for continuity between those prongs?.. I was suspecting W/D because there is vibration/mechanical movement that could damage wiring etc. inside the machine. Have you been able to thoroughly inspect inside the W/D or check for continuity between the case and the plug prongs? The receptacle could be suspect except that there is little chance for movement that would precipitate damage.