Pool and Spa
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Ok, so if you disconnect the two leads going to the heater, and then try the breaker again. Does the breaker stay on with the heater disconnected?
Well, if the breaker doesn't trip when the heater is unhooked, then that means the heater is shorted, it shouldn't have anything to do with the board if that solved the breaker issue. So with the board installed, and heater still unhooked, everything works except for heat, correct?