Escobar, do you mean the circuit breaker that provides power to your outlet, or the safety reset button on the K8 relay on H82?
On a side point I was working on my H82 today also, it had developed a fault so that when the thermostat reached set point to switch heat on or off, the heat control / pressure gauge would oscillate crazily on and off multiple times per second for 3-5 seconds before settling on being on or off. Eventually tripping the safety cut off. Replacing the thermostat control unit and the return side temperature sensor with a one I bought on ebay a couple of weeks ago seems to have solved the problem, it now reaches set point and switches on or off and has about a 3 degree swing between on and off set points. The new control unit from ebay is listed as
H82 HEATER CONTROL 8720694-1 and was priced at under $20, best money I have spent on this heater so far.
p.s. this new controller seems to be a newer revision of the controller that was in my H82, has Phillips head screws vs flat heads on the terminal strip, etc.