I claim the ornamental design for a fan switch actuator, as shown and described.
FIG. 1 is a perspective view of a fan switch actuator, showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof; and,
FIG. 6 is a rear elevational view thereof.
The ceiling fan structure and the handle portion of the fan switch actuator depicted by means of broken lines in FIG. 1, form no part of the claimed design.
FIGS. 4, 5, and 6 have been shown with a symbolic break in length, wherein the appearance of any portion between the break lines forms no part of the claimed design.