benhen Posted January 17, 2019 Report Share Posted January 17, 2019 i have a 2003 sweetwater bahia/w. a few weeks ago, the spa began humming... over the next week and a half, it kept getting louder and louder, but was working normally. around this time, it started turning on and off constantly and working erratically. now i throw the breaker, it clicks, starts the loud hum, display boots up, shows temperature, shows heat lamp, continues as normal (but still humming) for about 5-10 seconds, then everything turns off. sometimes in this cycle it will show “355” or “888” on the display in boot up or shut down. additionally, i can turn on JET 1 before it shuts down and it will run for an additional 10+ seconds before repeating the shut down process. whenever i hit JET 2, it shuts down immediately. i am unsure if replacing the board is what i need to do, and if so... if this model is the right one to buy “6600-288” (NOTE: NEW PART NUMBER BEING USED INSTEAD IS “6600-726”). Quote Link to comment Share on other sites More sharing options...
Jersey Hot Tub Repair Posted January 17, 2019 Report Share Posted January 17, 2019 Before you replace the board, I'd examine the interior and determine where the hum is coming from. A seized motor would hum and could also trip the breaker if it was wet from a leak. When replacing the board, go by the chip number - there will be an IC chip on the board with a small label with a number, that's what you use to find the correct board. But I've never heard of a board humming, my guess is you have a problem somewhere else. Dave Quote Link to comment Share on other sites More sharing options...
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