I have replaced the heater. I turn on the spa. It still trips the breaker. Once, it stayed on for several hours and then tripped the breaker.
NOW, I disconnected the heater, turned it on, it stays on flashes FLO, COOL, 79 degrees. then after a few moments kicks on #1 pump.
1. Why does pump #1 come on?
2. Does COOL mean it thinks the water is too hot?
I can see that the flow sensor is not making contact and I assume that is because when the heater is not attached the circulation pump doesn't run.
A little help.