Levoit air purifier red light meaning
Cause 1 of 2The AirSight Plus Laser Dust Sensor may need to be cleaned. Source: Troubleshooting (cont.), p. 19
First checkClean the sensor.
Causes and checks
The AirSight Plus Laser Dust Sensor may need to be cleaned. Source: Troubleshooting (cont.), p. 19
- Clean the sensor. See Clean the AirSight Plus Laser Dust Sensor.
An ultrasonic humidifier near the air purifier: the sensor detects the large mist particles and the Air Quality Indicator may turn red. Source: Troubleshooting (cont.), p. 19
- Do not use an ultrasonic humidifier near the air purifier, or do not use Auto Mode.
All 2 causes checked. Contact Levoit Customer Support: 1-888-726-8520.
Service
If the checks above do not clear it, contact Levoit Customer Support: 1-888-726-8520, support.levoit.com. United States (Monday to Friday, 9:00 am to 5:00 pm PST/PDT). Source: Customer Support, p. 25
Other Core 600S problems
- Air purifier will not turn on or respond to buttons2 causes in the manual. First: the air purifier is not getting power, or the power cord is damaged.
- Airflow is significantly reducedThe filter is in its packaging, the fan speed is low, clearance is short or the pre-filter is clogged with hair or lint.
- Air purifier makes an unusual noise while the fan is onThe filter is not properly in place, the plastic packaging is still on it, or the purifier is not on a hard, flat, level surface.
- Strange smell coming from the air purifierA smell comes from the air purifier, possibly from the filter or from use in a humid area or while diffusing essential oils.
- Display stays dark or the purifier shuts off in a dark room2 causes in the manual. First: light Detection is on, so the light sensor switches the display off in a dark room.
- Poor air purification quality3 causes in the manual. First: the room is larger than 635 ft² / 59 m², so air purification takes longer.
- Air quality indicator always stays blue when the air is poorThe AirSight Plus Laser Dust Sensor detects airborne particles but cannot detect gas.
- Purifier will not connect to the VeSync app5 causes in the manual. First: the phone's Bluetooth is off, or the phone is connected to another Bluetooth device.
- Purifier shows offline in the VeSync app2 causes in the manual. First: the purifier is offline.
Sources
- User Manual, Core 600S-P smart air purifier (Core 600S series). Arovast Corporation. Document HEAPAPLVSUS0091A, revision A2-241014, 28 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.