Suz Posted January 31, 2019 Report Share Posted January 31, 2019 I have a Balboa VS501z that has no heat. Meter testing to the heater had normal results, the red heat light on the control panel is on but heat never reads more than 50. We replaced the heater, and still have no heat. System goes through priming, heat light comes on but we get no heat. Pulled the circuit board, and there are no burns. Entire system appears pristine, but we have no heat. Please help solve this mystery! Quote Link to comment Share on other sites More sharing options...
jbover23 Posted February 11, 2019 Report Share Posted February 11, 2019 I have the exact same problem in my jacuzzi j345. I replaced the filters, heater, hi limit switch, and temp sensor. The only thing i can think of is the circut board is next? Quote Link to comment Share on other sites More sharing options...
Jersey Hot Tub Repair Posted February 23, 2019 Report Share Posted February 23, 2019 " Meter testing to the heater had normal results, " What Does that mean? What is the electrical service to the spa? How many volts across the two heater leads on the circuit board? How many volts on each individual lead to ground? For a 240V spa, you should get 240 Volts between the two heater leads. If you get 0 volts, and the heating indicator is ON, it probably means the circuit board is bad. For whatever reason, one of the heater relays isn't closing. Dave Quote Link to comment Share on other sites More sharing options...
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