Levoit Core 400S how to clean the AirSight Plus Laser Dust Sensor
Every 3 months, or when the air quality ring stays red. More often in a dusty environment.
Steps
- Unplug the air purifier.
- Place the end of a vacuum cleaner over the sensor openings.
- Run the vacuum for at least 10 seconds to clear the dust.
Source: Care & Maintenance (cont.) Source: Care & Maintenance (cont.), p. 14
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 pre-filterEvery 2 to 4 weeks.
- 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.