Levoit Core 300S smart air purifier
- Category
- Air purifiers
- Model number
- Core 300S, Core 300S-P
- Region
- United States
- Verified
- Error E1
- Check Filter Indicator
- Air purifier will not turn on or respond to buttons
- Airflow is significantly reduced
- Air purifier makes an unusual noise while the fan is on
- Strange smell coming from the air purifier
- Poor air purification quality
- Air quality indicator always stays red
- Air quality indicator always stays blue when the air is poor
- Purifier will not connect to the VeSync app
- Purifier shows offline in the VeSync app
- How to reset the Check Filter Indicator
- How to replace the filter
- How to clean the pre-filter
- How to clean the AirSight Plus Laser Dust Sensor
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Error codes
| Code | Meaning | Checks |
|---|---|---|
| E1 | The motor has malfunctioned. | Checks |
| Check Filter Indicator | A reminder to check the filter. It lights within 6 to 8 months of use, sooner with frequent use and later with light use. | 3 causes |
E1
Error code "E1" on the display. The motor has malfunctioned.
Levoit Customer Support Contact Levoit Customer Support: 1-888-726-8520 or support@levoit.com. Contact: 1-888-726-8520 or support.levoit.com.
Problems
- Air purifier will not turn on or respond to buttons2 causes in the manual. First: the purifier gets no power, or the power cord is damaged.
- Airflow is significantly reduced3 causes in the manual. First: airflow is significantly reduced.
- Air purifier makes an unusual noise while the fan is on3 causes in the manual. First: the filter is out of position or the purifier stands on an uneven surface.
- Strange smell coming from the air purifierStrange smell coming from the air purifier.
- Poor air purification quality3 causes in the manual. First: the room is larger than 219 ft² (20 m²). The air purifier may not be as effective in larger rooms.
- Air quality indicator always stays red2 causes in the manual. First: the AirSight Plus Laser Dust Sensor may need to be cleaned. Dust blocking the sensor affects its accuracy.
- 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 app4 causes in the manual. First: during setup the purifier must be on a secure 2.4GHz Wi-Fi network.
- Purifier shows offline in the VeSync app2 causes in the manual. First: the purifier is offline.
Strange smell coming from the air purifier
Strange smell coming from the air purifier. Source: Troubleshooting, pp. 15, 21
- Clean the filter, or replace it if necessary. See Clean the pre-filter.
- Make sure not to use the air purifier in an area with high humidity or while diffusing essential oils.
Levoit Customer Support If the smell continues, contact Levoit Customer Support: 1-888-726-8520. Contact: 1-888-726-8520 or support.levoit.com.
Air quality indicator always stays blue when the air is poor
The AirSight Plus Laser Dust Sensor detects airborne particles but cannot detect gas. Source: Troubleshooting (cont.), p. 16
- Check that no gas is polluting the air.
How-to
- 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 6 to 8 months.
- 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.
Maintenance
| Task | When | Source |
|---|---|---|
| Clean the outer pre-filter with a soft brush or vacuum hose | Every 2 to 4 weeks | Source: Care & Maintenance, p. 13 |
| Replace the filter | Every 6 to 8 months, earlier in a polluted environment | Source: Care & Maintenance (cont.), p. 14 |
| Clean the AirSight Plus Laser Dust Sensor with a vacuum cleaner | Every 3 months | Source: Care & Maintenance (cont.), p. 14 |
| Unplug, then wipe the outside with a soft, dry cloth, or a damp cloth dried at once, and vacuum the inside. No abrasive chemicals or flammable cleaning agents. | Source: Care & Maintenance, p. 13 |
Settings
| Setting | Options | Notes | Source |
|---|---|---|---|
| Disconnect from Wi-Fi | Hold the On/Off button for 15 seconds until the Wi-Fi indicator turns off | Restores the default settings and disconnects the purifier from the VeSync app. To reconnect, add the device again in the app. | Source: VeSync App Setup, p. 8 |
| Auto Mode | Tap the Auto Mode button | Fan speed follows the air quality ring: blue Sleep Mode, green low, orange medium, red high. After switching on, the ring stays blue for 5 seconds while the sensor reads the air. | Source: Using your purifier (cont.), p. 9 |
| Quiet and Efficient Auto Mode | Choose in the VeSync app | Quiet Auto Mode never uses the highest fan speed. Efficient Auto Mode lets you choose the size of the area to purify. It uses the highest fan speed to clean the air in that area, then lowers to the fan speed best suited to the selected room size. | Source: VeSync App Functions, p. 11 |
| Sleep Mode | Tap the Sleep Mode button | Uses a fan speed lower than speed I and turns the display off after 3 seconds. | Source: Using your purifier (cont.), p. 9 |
| Timer | 1 to 12 hours on the purifier in 1-hour steps; 1 to 24 hours in the VeSync app | The purifier turns off when the timer ends. Tap the Timer button until the display reads --H to cancel. | Source: Using your purifier (cont.), p. 10 |
| Display Lock | Hold the Display Lock button for 3 seconds | Buttons do not respond to taps. Settings can still be changed through the VeSync app. | Source: Using your purifier (cont.), pp. 10, 11 |
Parts and consumables
| Item | Part number | Replace or refill | Specification | Source |
|---|---|---|---|---|
| Core 300-P-RF Levoit 3-Stage Original Filter | Core 300-P-RF | 6 to 8 months | Traps fine particles such as dust, pollen and pet dander and adsorbs common household smells. Best used for allergies, dust and light odors. | Source: Levoit Replacement Filters, p. 12 |
| Core 300-RF-PA Levoit 3-Stage Pet Allergy Filter | Core 300-RF-PA | – | Adds a High-Efficiency Activated Carbon Filter for strong smells, customized for pet odors and cooking smells. Best used for pet allergies and bad-smelling rooms. | Source: Levoit Replacement Filters, p. 12 |
| Core 300-RF-TX Levoit 3-Stage Toxin Absorber Filter | Core 300-RF-TX | – | Adds a High-Efficiency Activated Carbon Filter customized for air pollution, cigarette smoke, vehicle exhaust, toxic gases and fumes, VOCs and wildfire smoke. Best used for high air pollution and smoke. | Source: Levoit Replacement Filters, p. 12 |
Specifications
Smart air purifier for the VeSync app with an AirSight Plus laser dust sensor, a colour air quality ring and three fan speeds. One manual covers the Core 300S series and the Core 300S-P series. Source: Cover; Getting to know your smart air purifier, pp. 1, 5
The Check Filter Indicator is the filter-change light. It lights within 6 to 8 months of use and is reset by holding the Sleep Mode button for 3 seconds. Source: Controls; Care & Maintenance, pp. 6, 13
E1 on the display means the motor has malfunctioned. Source: Troubleshooting (cont.), p. 16
| Electrical | AC 120 V, 60 Hz, rated power 39 W, standby power below 2 W | Source: Specifications, p. 2 |
|---|---|---|
| Operating conditions | 14–104 °F (-10–40 °C), humidity below 85% RH | Source: Specifications, p. 2 |
| Noise level | 22–54.5 dB | Source: Specifications, p. 2 |
| Dimensions (W × D × H) | 8.7 × 8.7 × 14.2 in (22 × 22 × 36 cm) | Source: Specifications, p. 2 |
| Weight | 7.48 lb (3.393 kg) | Source: Specifications, p. 2 |
| Room size for normal purification speed | Up to 219 ft² (20 m²); larger rooms take longer | Source: Troubleshooting (cont.), p. 16 |
| Clearance | At least 15 in (38 cm) on all sides | Source: Getting started, p. 7 |
Recalls
No exact-model match for Core 300S in the U.S. Consumer Product Safety Commission recall database, checked . Recalls can name model families, so also check current recalls for Levoit.
Service 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. 21
Sources
- User Manual, Core 300S series and Core 300S-P series smart air purifier. Arovast Corporation. Document HEAPAPLVSUS0073A, revision A2-240918, 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.
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