The US WM4000 washer has a drain pump filter behind a lower-front cover. Its full ABWEMUS suffix matters when checking replacement parts.
What to check before buying
Model and installation
WM4000HWA identifies the white US washer; LG’s support entry adds the ABWEMUS suffix. Use the full label and serial number when matching a part. LG’s specification sheet also gives dimensions for checking the laundry space, hose clearance and door swing. A machine that fits the alcove may still need room for service access.
Drainage and service
LG’s WM4000 manual locates the drain pump filter behind a lower-front cover. Restricted drainage may be a filter-care issue before it is a failed pump. On a used washer, see a complete fill, drain and spin cycle and check the floor for leaks. If a component is suspected, get a part and labour estimate against the complete model code.