I have been looking for a mysterious reset button to no avail. My hot tub is a Hotsprings Vanguard and the heater is a 240v 6000 watt no fault heater. The heater has a black box with two metal tubes coming out of one side, and two hoses coming out also. the other end of the metal tubes have a much smaller black box. I felt all around and could find no button, and the one sticker I found on it I completely removed and still saw no button. The hotspring website offers little help. Any ideas on where this reste button lives?

Do you have a tri-loop or Titanium heater? Based on your description, you don't have a "No Fault 6000" anymore... if you once did, it has been replaced with the tri-loop.... Or, if your hot tub is new enough, it has the "Titanium" hetaer that has no reset/sw.

Anyway, if you have a "Tri-loop" the reset button is under a round peice of rubber on the side of the heater, on the end where the power cord attaches. Could be on the side facing away from you. It *should* have a sticker on the side with an arrow pointing down to the button, but not always. Impossible to see if positioned away from you. It's on the side, not the end... but the side of the end with the power cord.... ok, that makes it sound really confusing..... hope it helps