David L Posted March 7, 2021 Report Share Posted March 7, 2021 I have a Hotsprings Jetsetter model JJ. S/N: JJ2H1322. I think it’s a 2006 or 2007 model. I have replaced lots of parts in attempt to get the heater working, without any success. I have replaced the circulation pump, the heater itself, the high temperature sensor and the control sensor. I have also replaced the 3 water filters and put the jumper on the motherboard where the old pressure switch connector was attached. The heater LED lights up when the jets are turned off, but I still get no heat. I’ve now measured the voltage on the heater board at the terminals for the heater when the LED light is on, and I get no voltage. I am guessing that the relays on the heater board are defective. I CAN, of course, heat the water by running the jets continuously, but obviously this is not the desired method. I have read here about bad heater boards and bad relays. Any advice on where to go next with this? I plan on replacing the heater board unless someone pipes up and has a different suggestion.... Thanks in advance! David Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted March 8, 2021 Report Share Posted March 8, 2021 The newer relay boards seem to be problematic. If you can, I would suggest you have the old one rebuilt. 1 Quote Link to comment Share on other sites More sharing options...
David L Posted March 8, 2021 Author Report Share Posted March 8, 2021 This morning, after unplugging the unit, and then disconnecting the heater black and white wires, and then plugging the unit back in, I measured the voltage at P3 and P2 with the heater light on, and only got 5 V. I then unplugged the hot tub again, and removed the relay board. Heat damage immediately became obvious. The pictures of the relay board are attached. I will be attempting to purchase a new one this morning as I can not find a used board or a place to repair this one. I guess I will take my chances with a new board... Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted March 8, 2021 Report Share Posted March 8, 2021 Where are you located? Quote Link to comment Share on other sites More sharing options...
David L Posted March 8, 2021 Author Report Share Posted March 8, 2021 I am in Santa Clarita, CA. This is about as far north as you can get, and still be considered to be in the Los Angeles area. thanks! David Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted March 8, 2021 Report Share Posted March 8, 2021 https://www.a1spacontrol.com/contact-us In Riverside.CA. Not sure about their quality of work but It's a simple fix and might save you a few $$ 1 Quote Link to comment Share on other sites More sharing options...
David L Posted March 11, 2021 Author Report Share Posted March 11, 2021 I replaced the heater relay board and the hot tub is heating normally now. I’m going to hang onto the old heater relay board. If the new one fails within a short period of time I’ll see about getting the old one repaired thanks for all you help! david Quote Link to comment Share on other sites More sharing options...
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