Willis WMI12MH16S Service Manual page 119

Steps
1.Remove handle and valve cover
Twist off the screws used for fixing the handle, pull
the handle upward to remove it.Loosen the screws
fixing the valve cover and then remove it.
2.Remove top cover
Remove connection screws connecting the top
cover plate with the front panel and the right
side plate,and then remove the top cover.
3.Remove front grill
Remove the screws connecting the
the front panel. Remove the
Procedure
front grill and
front grill.
front grill
handle
valve cover
top cover