The Greek guy came at the appointed time. He went through a process of entering several "secret codes" that apparently stepped through all the modes looking for error codes. Then looked under the sink and noticed that the dishwasher plug wasn't fully plugged in due to interference with the garbage disposal plug. He got a 12" flat panel extension cord from his truck. It is rotatable so can be rotated so as to avoid interference with the other plug.
He gave us his direct line number and said to call him if the problem isn't solved. It didn't fix the problem, so I placed that called. I'll post again after his next visit.
He sent me 2 invoices, one billing me $40 and one showing $40 paid under the Total Service Plan. So, the visit and extension were free.
BTW, we've had several similar experiences for appliances bought from Best Buy. Furthermore, the Total Service Plan covers things NOT bought at Best Buy. I have an old laptop I bought at Fry's (remember Fry's?) that had developed some problems. They told me to schedule an appointment. I did, but before the appointment I solved the problem myself so cancelled the appointment.
In short, I'm a big fan of Best Buy and the Total Service plan.