It is a 110V dedicated circuit that I installed 7 years ago, the last two times it was the high low switch on the main board (if I remember correctly). It has been running fine for several months after the last board change, it only happens when the power is interrupted and than reconnected. When I replaced the board I took pictures of all the wire connectors and did not deviate, the bad board showed no char marks. I have also replaced the relay about 5 years ago and the back of that board did have the tell tale signs of char marks.
It might be important to note that the switch inside the tub that controls the jets and lights has been acting up, you can press the button and nothing happens and then 10 minutes later out of the blue the jets come on. I'm not sure if the two issues could be connected? Can someone please share the tech bulletin on diagnosing the boards?