a warming chamber defining a heated internal cavity is presented having a door that may be opened or closed to provide access to the cavity for the storage of , for example , food products . the chamber includes a temperature sensor that sends signals to a control regarding the sensed temperature within the cavity . the control then activates heating elements when necessary to maintain the cavity at a predetermined temperature . the control further senses when the door has been opened , and supplies a power boost to the heating elements in anticipation of a cooling effect even though a temperature drop within the cavity has not yet been sensed .