[RayChez1]

I assume the black box is the box that is on the outside. Only way to get to it is by removing the vent cover on the outside? That is the only box I know off that has the mother board. It also has two or three fuses in there that blow out every once in a while. I had one blow on me like ten years ago while I was in Oregon. I called one of those RV mechanics that come around to the RV parks and he went straight to that box and replaced a five amp fuse.

But I do not remember what code was flashing inside the motor home. It might have been NO CO.