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I have a 2004 Sundance Bahia that worked fine last year. Filled it for the season this year and there was no power to the top side control. It was old and faded anyway so I ordered one and installed it. No change. We live far enough away from a repair shop that parts switching is cheaper than service calls so I ordered a new board and transformer. Installed everything and the tub came on. I pushed the high speed button on the controls and the GFCI tripped. I wired a standard breaker in the box (we weren't getting in the tub) and the pump made one heck of a noise and blew the 30 amp fuse to the board in about 5 seconds. I pulled the two speed pump and took it to an electric shop that is absolutely the best around. After dropping it off I continue to screw with the tub. I am very worried about safety so I ran all new wire (three wire tub) reinstalled the GFCI and powered the tub without the pump. It powered up and looked to be acting normal. Topside was showing trouble codes and no breakers, fuses or GFCI was tripping. However, nothing is ever as it seems. The heater must have kicked on because in the time it took to grab a coke I went back to a hot dry fire on the heater (the pump was with the motor at the electric shop so the tub was empty). Finally picked up the pump and they said it was in great shape and the problem was on my end. His advice was that I was potentially getting way more voltage to the pump than is required. I wired the pump motor outside of the tub to run down issues. The GFCI immediately tripped and when I reinstalled the plain breaker the 30 amp fuse blew again. Because I'm a parts switcher and not a tech I started pulling wires on the pump motor and checking the GFCI. The only time it wouldn't trip is when the black(low) wire was connected. Unfortunately the circ pump to the heater runs constantly when i have the tub turned on now. We have had the hot tub for years now and the only thing that I can recall that was weird from last season to this one is that I found the breaker reset in June or July this year. I'm sure I would have done that but for the life of me I couldn't remember why would power up an empty hot tub in the summer. If anybody has ideas or there is a sticky post somewhere I missed I appreciate somebody pointing me in the right direction! Like my username states I will be divorced if I don't get this fixed soon lol!