The ornamental design for a transfer switch face panel, as shown and described.
FIG. 1 is a front elevation of the transfer switch face panel, according to one embodiment of our new ornamental design.
FIG. 2 is a side elevation thereof; and,
FIG. 3 is a perspective view thereof.
Any elements shown in broken lines do not comprise part of the claimed subject matter, and are shown for environmental purposes. The large annular feature at the top center of the face panel surrounds a recessed opening, the interior of which is not part of the claimed invention. The two rows of cylindrical structures are at least partially clear, translucent or transparent. The two cylindrical segments at the opposed end of the upper row of cylindrical features are at least partially clear, translucent or transparent.