LG lists the AS401VSA0 as a air purifier. The most common service call on this unit is: filter-change light staying lit after a genuine replacement filter is fitted. LG’s own US product page flags this exact model discontinued (read 24 September 2026); it is out of production but not out of the field, and it is exactly the kind of model that has nowhere else to turn for support.
Service calls on this air purifier most often trace to one of a short list: filter-change light staying lit after a genuine replacement filter is fitted, fan not responding to the automatic speed setting, or new rattling or grinding noise from the fan assembly at higher speeds. We confirm which one applies against the model and serial number before ordering a part.
Key Features
- Filter-change indicator light
- Multi-stage filtration ahead of the fan assembly
Most Common Issues on This Model
Filter-change light staying lit after a genuine replacement filter is fitted
Fan not responding to the automatic speed setting
New rattling or grinding noise from the fan assembly at higher speeds