Re: heatrae water boiler
http://www.heatraesadia.com/hs/heatraes.nsf
check out hear there is some helpful advise on there & details of how to get parts etc, i’ve had a few problems with their boilers before but nothing a set of thermistors wouldn’t cure, if the button needs to be reset it means that the control thermistor or control thermostat is not functioning properly, BOTH thermostats have to be changed, High limit cut-out & control one, from memory, best of luck..