Hey There. I was just given a Hot tub that I am close to getting to work. I just bought a new heater element from here which was the last piece i needed. (sorry at work and dont have the model of the tub) But it is a Jacuzzi tub, with a balboa tube style element, with a r576 (i believe) circuit board. When I take the side off the hot tub that grants me direct access to the circuit board and heat element, I then see two pumps. One closer pump that seems to feed directly into the heater, and one further back that goes around the heater and into the octopus of jet hoses. When I turned the hot tub on last night for the first time, the low speed motor turned on like normal, but I dont think the right motor turned on. It was the far motor that was running as the low speed, not the one that directly passes through the heater. So I was writing to double check that my thinking is correct. because on low the heater does not come on, but when i turn it on it does come on (because it finally has water pressure in the heater. So should I swap out the two motor wires so the low speed motor is the one close the the circuit board that feeds the heater?

Thanks for any tips and advice!!! I feel I am finally close to getting to enjoy the tub!!!!

If by low speed pump you mean the circulation pump it woould be the small one whioch feed directly thru the heater.

Alternatively if by low speed pump you mean the low speed jets (vs the high speed jets) your large motor (or 2) should be a 2 speed motor. Does this help?