A heater controller to maintain a uniform temperature of a printhead is provided herein. The heater controller monitors the temperature of the printhead and controls the heating of the printhead. The heater controller enables at least two of a plurality of warming groups based on warming power requirements of the printhead. The heater controller alternates activation of the at least two of the plurality of warming groups by rotating each of the at least two of the plurality of warming groups between an on mode and an off mode to uniformly distribute heating power to the printhead.