Hey Roger… So right you are… I believe I have narrowed my problem down to the heater. I was able to duplicate the problem and troubleshoot by doing this… I ran the “boost filter cycle” today, as the water was a little cloudy from being used all weekend. About 5 minutes into the cycle, the breaker kicked off. Since I was right there, I immediately went over and turned the breaker back on, and it tripped immediately. It tripped on me immediately about 5 times in the next minute, so I took the panel off the spa and started unplugging component, and seeing if the breaker would stay on. After unplugging pump 1, 2, and the blower, the breaker still tripped when I turned it on. I then unplugged the heater, and the breaker stayed on. So, I plugged everything back in to the board, and the breaker tripped when I turned it on. Then I unplugged the heater, and the breaker stays on. I tried the breaker with the heater plugged/unplugged three more times, and it tripped every time the heater was plugged in, but not when unplugged. I plan to call the dealer tomorrow, but it looks like the heater is causing a ground fault. I just wanted to follow up on this for all of you that provided help. Thanks again, and I will let you know if anything else pops up!!!