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