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Hi Hot Tubbers, I'm hoping that I can find and answer on here to a problem I have with my hot tub and here's all the info I think you'll need:-I purchased a Balboa Sports Deep hot tub in latter end of 2015 and we had 18 months of very happy hot tubbing without any problems at all. We then noticed a "popping" or bang sound coming from inside the hot tub, which definitely sounded electrical. The occurrence of this sound was rare, but after several weeks it popped again, which took out the main circuit breaker in the house! When trying to power it back on, it always took out the circuit breaker, so was shorting somewhere. The heater element resistance checked out ok. However, there were signs of electrical "flashover" between the live (UK 240V) and neutral. I tried again to power the hot tub on whilst observing the electrical connections and confirmed the electrical flash was present at that point. So I purchased a replacement GS500Z control board and this fixed the problem! Its been 13 months since fitting the replacment PCB and its unfortunately failed again in exactly the same way. We heard some popping a couple of weeks ago, then it failed over the weekend, again taking out the main house circuit breaker.I havent removed the PCB yet, but can see the same electrical burning marks. I've checked the resistance between the hot tub earth and main house earth and found this to be 1 Ohm, which I think is ok?I'm guessing that if I replace the PCB again, all will be fine, but dont want to have to do this again a year from now.Do any of you have any ideas what could be causing this, or is it a known issue with Balboa's with this PCB?By the way, the hot tub is left powered on 24/7.Thanks in advance.
Loose connections will cause problems. There are certain torque requirements for various connections. And over time, due to vibration, if the connection became loose(er) it could lead to 'arcing and sparking'. This may not at first be readily apparent even if not properly connected. But over time it can rear its ugly head. Also, over tightening of smaller wires can cause the same effect. >Loctite< Get a "qualified" electrician.