The ornamental design for a powersteamerhead, as shown and described.
FIG. 1 is a perspective view of the power steamer head showing my new design.
FIG. 2 is a right side view of the power steamer head.
FIG. 3 is a left side view of the power steamer head.
FIG. 4 is a front view of the power steamer head.
FIG. 5 is a back view of the power steamer head.
FIG. 6 is a top view of the power steamer head; and,
FIG. 7 is a bottom view of the power steamer head.
Features illustrated with dashed lines are not considered features of the invention being claimed, but rather illustrate an exemplary environment for the claimed features illustrated with solid lines.