I claim the ornamental design for a ceiling fan motor housing, as shown and described.
FIG. 1 is a front perspective view of a ceiling fan motor housing showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof.
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of portions of the ceiling fan motor housing is included for the purpose of illustrating environmental structure and forms no part of the claimed design.