Levoit Core 400S how to clean the pre-filter
Every 2 to 4 weeks.
Steps
- Unplug the air purifier.
- Clean the outer pre-filter with a soft brush or a vacuum hose to remove hair, dust and large particles.
- Keep water and other liquids away from the filter.
The Main Filter and the Activated Carbon Filter cannot be cleaned.
Source: Care & Maintenance Source: Care & Maintenance, p. 12
Used for
Other Core 400S procedures
- How to reset the Check Filter IndicatorAfter replacing the filter while the indicator is lit, or after replacing it before the indicator lit.
- How to replace the filterWhen the Check Filter Indicator lights and the filter is clogged, noisy or loses airflow, or every 12 months.
- How to clean the AirSight Plus Laser Dust SensorEvery 3 months, or when the air quality ring stays red. More often in a dusty environment.
- How to disconnect from Wi-Fi and restore defaultsTo restore the purifier's default settings and disconnect it from the VeSync app.
Sources
- User Manual, Core 400S smart air purifier. Arovast Corporation. Document HEAPAPLVSUS0162Y, revision A1-241202, 24 pages, en-US. levoit.com (PDF). Listed on the manufacturer's support page. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.