A boiler control method and system. alternatives, radio frequency communications alternatives, optical communications alternatives, and hard wire communications alternatives. The male latch member is comprised of an arbor with a planar handle at its proximal end and a catch apparatus at its distal end. In another mode, a DC signal of a third voltage is produced, which causes the motor to produce a third armature current. The controller sets the first set temperature to be higher than the second set temperature in one of the time periods and sets the second set temperature to be higher than the first set temperature in another of the time periods.