I have a hotspring spa with a no-fault 6000 heater. It is not heating. Everything else seems to work. the manual states to reset the heater thermal cut off may have tripped.... how do I reset this ? It states "simply locate the red button on top ot the heater ahd push down on the button".... I can't find that silly red button!!!

If it's the "trombone" shaped one, with a couple of loops of stainless, put your hand over the bottom black plastic base and find the button on the back side. You will feel it, not see it. Push! It pushes in extremely hard and the click is almost imperceptible. But if you got it and then turn the spa on you will feel some warmth from the heater...