A power control device for an electrically powered appliance may selectively switch off one 110-volt input (of two separate 110-volt input lines) of a 220-volt power supply to the appliance during certain periods of operation, in response to a demand-response request. This may adjust operation of one or more components of the appliance, thus adjusting an amount of power consumed by the appliance. A determination of which one, of the two, 110-volt input lines to be switched off may be made based on an analysis of the amount of power consumed by each of the two 110-volt input lines during operation of the appliance. The power control device may be provided at any point between the electrically powered appliance and a power distribution panel distributing power from an external source.