Levoit core 400s filter replacement
When the Check Filter Indicator lights and the filter is clogged, noisy or loses airflow, or every 12 months.
Steps
- Unplug the air purifier.
- Turn the air purifier over or onto its side and remove the filter cover.
- Remove the old filter.
- Vacuum any remaining dust or hair from inside the air purifier with a vacuum hose. Do not use water or liquids.
- Unwrap the new filter and place it in the housing.
- Replace the cover and plug in the air purifier.
- Reset the Check Filter Indicator. See Reset the Check Filter Indicator.
Source: Care & Maintenance (cont.) Source: Care & Maintenance (cont.), p. 14
Used for
- Check Filter Indicator: A reminder to check the filter. It should turn on at about 12 months, sooner if you run the purifier frequently and later if you do not use it often.
- Airflow is significantly reduced
- Air purifier makes an unusual noise while the fan is on
- Poor air purification quality
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 clean the pre-filterEvery 2 to 4 weeks.
- 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.