got one of these in for repair. fills to level, starts circulating & heating ok.
after a short time the circ pump stops but the heater stays on, after 30 seconds or so the circ pump starts back up then stops again & so on.
as the water in the heater has no movement at times it boils.
power to the the motor is cut, there are no breaks in wires.
could someone confirm that this is a control board fault.
a part number would be usefull as there apears to be two possibles.
serial number is 31712648