C-COOP Posted August 7, 2015 Report Share Posted August 7, 2015 My tub is having intermittent issues heating, would call for heat and the heat light would come on, but the heater would only come on very sporadically.This is my board:http://www.spaandpoolsource.com/lx10-spa-builders-circuit-board-sundance.aspxI started tracing the 240V with my meter and followed one line to a relay and on to the heater - this one was working fine. I traced the other line into 2 relays in series. The voltage was going through the first relay correctly and then never made it to the output of the second relay. So I pulled the wire off and bypassed the second relay and sure enough heater is working perfect now.I tested this setup and the heater is cycling fine with the thermostat and I even pulled off a wire from the flow sensor and that also turned off the heater correctly.Am I risking anything running like this? Not sure if the second relay was shot or whatever sensor that was connected to it was shot. Maybe hi heat sensor???All opinions welcomed. Quote Link to comment Share on other sites More sharing options...
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