Ioslation transformer must still have the secondary (the 120
volt side) connected back to the building safety ground. If
not, then the appliance will 'float' - can become electrically
hot. If the transformer is properly designed, then either it
has such a connection OR it has a dedicated grounding wire
terminal to make that necessary connection.

TJ Hertz wrote:
Yeah, I know, and that's probably what I'll do - I was just asking
if there were any ways of fixing it. Obviously if the problem
remains I will warn any buyer.
...