WM9998HBA is LG’s flagship WashCombo: a single 30-inch drum that washes and then dries the same load without anyone moving it to a second machine, using a heat pump instead of a resistive element or an external vent. It is genuinely a different appliance from a washer with a dryer stacked on top — there is one drum, one door, and one bearing assembly doing both jobs, which changes where a fault actually lives.
The unit has its own documented fault code, dHE, that appears specifically during the heat-pump dry cycle and does not exist on any of LG’s separate dryers. Because wash and dry share the same drum and bearing, a fault that shows up only in the dry phase after a normal wash — rather than from the start of the cycle — usually points at the heat-pump condenser or its lint path, not at anything mechanical shared with the wash side.
Key Features
- LG SIGNATURE badge with a heat-pump ventless drying system
- Single drum washes and dries the same load without moving it
- AI DD load sensing for both the wash and dry portions of the cycle
- No external vent required — the heat pump condenses moisture internally
Most Common Issues on This Model
dHE fault code, specific to this unit's heat-pump dry cycle
OE drain fault on the wash portion of the cycle
Extended dry times as lint builds up in the internal heat-pump condenser rather than an external vent
UE unbalance fault carrying over from the wash phase into the dry phase