Willis WMI12MH16S Service Manual page 110

Steps
1.Remove top cover and rear grill
Twist off the screws used for fixing the top cover, pull
the top cover upward to remove it.
Twist off the screws used for fixing the rear grill, pull
the rear grill upward to remove it.
2.Remove front grill and front panel
Remove the screws connecting the
the front panel. Remove the
Remove the screws fixing the panel, pull it upward,
loosen the clasp on the right side, rotate it to the
left and then remove the front panel.
Procedure
front grill and
front grill.
top cover
front grill
rear grill
front panel