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Sense+ support

All the topics, resources and guides you need for your Sense air purifier.

If the night mode is not working, the time zone settings in your mobile phone might be incorrect. Go to the Settings menu in your phone and set the time zone so that it corresponds to your current location.

You can find instructions for the filter replacement timer in the user manual provided with your unit. All user manuals are available online under our Customer Support section.

Filter reset for Sense, Sense+

When the red circle on the display is shown, it is time to replace the filter. To reset the filter timer, switch on the unit and hold your finger on the red circle until it disappears.


Make sure that you have removed the plastic cover from the filter (not applicable to all models and filters).

Make sure that nothing blocks the air inlet and outlet.

Make sure that no object or dust is clogged around the filter. If there is, remove the filter and clean the purifier with a vacuum cleaner.

To remove the filter(s) to see if it is causing the noise:

  • Turn off your air purifier and unplug it.
  • Remove the filter(s).
  • Plug in the unit and turn it on. If the noise disappears, install a new filter. If the noise is still there, please contact the retailer where you bought the air purifier. They will help you according to their warranty conditions.

First few times you use your air purifier

As with any new device, an air purifier can release a ’newness’ smell. Don't worry, this odor is not dangerous or toxic! Run your air purifier non-stop for a few days and the odor should dissipate.

For optimal use, keep the air purifier on at all times. It uses less energy than a low-energy light bulb.

Time to change the filter?

A dirty filter can release a dusty smell. Filters absorb odors from, for example, cooking. To avoid this, always replace the filter when indicated.

If your air purifier doesn’t switch on, try this:

  • Most Blueair models have a detachable plug that can slip out when you move the unit. Place the unit on its side and push the plug back into the socket at the bottom of the unit.
  • Make sure that the filter of your air purifier is correctly inserted and that the door of the air purifier is closed.
  • Unplug the unit from the electrical outlet and plug it back in again.-Plug the unit into another electrical outlet.
  • Check the power cord. If it is damaged in any way, unplug it immediately. Contact your local Blueair team to learn about getting a replacement or repair.
  • Make sure that you have selected a speed level to start cleaning the air.
  • If you are using a remote control, make sure that the battery is charged. If it isn’t, replace the battery.

If your air purifier still doesn't start, please contact the retailer where you bought the unit.

To use auto mode, your air purifier must have built-in sensors, or be connected to the Blueair Aware standalone air quality monitor. Check the user manual for your air purifier in our Customer Support section. Your air purifier model is shown on a label at the bottom of your unit.

If your air purifier has built-in sensors, start auto mode manually by pressing the auto mode button on the unit display. On Classic units, you find the display under the lid on the top of the unit. If your air purifier is connected to the app, start auto mode from the fan control screen: Fan speed 0 -> 1 -> 2 -> 3 -> auto mode.

If your air purifier doesn't have built-in sensors, and you use an Aware air quality monitor, set the auto mode from the app. The air purifier and the Aware must be paired.

To pair your air purifier and the Aware:

1. Log in to your Blueair Friend app and tap the air purifier in the device list.

2. Select the linking symbol.

3. Select the Aware monitor you want to link to your air purifier:

  • If you have already added a Blueair Aware air quality monitor to your account, select the Aware from the list of available devices.
  • If you haven’t yet added the Aware to your account, select Add Blueair Aware and follow the steps in the app. When the Aware is added, select the Aware from the list of available devices.

4. A pop-up in the app asks if you want to activate auto mode directly. You can accept and enable the auto mode immediately, or at any time from the fan control screen: Fan speed 0 -> 1 -> 2 -> 3 -> auto mode.

Auto mode is triggered by the level of particles (PM) and/or gases (tVOC). The trigger options depend on your filter type:

Particle filter: Auto mode is only triggered from Particles values. SmokeStop™ filter (combined filter with Carbon): Auto mode can be triggered from Particles values or both Particles and gases values.

You set the auto mode trigger(s) in the device information screen in the Blueair Friend app.

If you are using an air purifier with sensors, you have the option to set the purifier on auto mode, via the app or on the unit directly, to trigger the airflow speeds automatically according to pollution levels.

If your air purifier automatically runs on the highest speed level, it means that the concentration of VOCs and/or particles in the room have increased and requires faster air cleaning. You can choose via the app if you want the auto mode to trigger on particle levels or particle and gas levels (Tap the information details (‘i’)).

Your air purifier should gradually lower the airflow speed as soon as the air in the room is clean again.

What does it mean if the air purifier continues running on high speed?

Most of the time, it means that some dust is clogged on the filter or on the sensors. Here is what you can do:

  • Make sure you have replaced the filter in the last 6 months.
  • Make sure that the auto mode settings in the app are adapted to your type of filter (if you are using a Particle filter, the auto mode trigger in the app should be set to ‘Particles’ only. If you are using a carbon filter, the auto mode trigger should be set on both ‘Particles' and 'Gases’).
  • Check that no dust or any item is blocking the inlet and outlet grids of the air purifier. Vacuum the air purifier from the outside. Don’t forget to vacuum where the sensors are located. The sensors are two circular arrays of holes on the side or at the bottom of the unit.
  • Open a window and air out the room. If high levels of VOC (gases) are causing the full speed, the room might be filled with a gas which cannot be removed by the air purifier (tVOC sensors can sense thousands of different gases, including harmless ones which cannot all be removed by the air purifiers).
  • If auto mode and child lock are activated, deactivate them from the app. Try to change the fan speed from the app or manually.
  • If you are using an air purifier from E-series (models 270E, 450E, 550E, 650E etc.).
  • Use a can of compressed air (like the one you use for keyboards) to clean the sensor area. From the outside, give the sensor area a couple of 3 seconds blasts.
  • The sensors are two circular arrays of holes on the side of the LED display, one will be arranged like a flower; the other, a circle.
  • If cleaning the sensor area doesn't help, reset the software on your air purifier. This resets the filter timer and the sensor: link to how to reset the E-series settings.

If you need any help, do not hesitate to contact the place where you bought the unit or Blueair directly.

Your device has lost its Wi-Fi connection temporarily.

If you haven’t changed any the Wi-Fi settings on your router, the device should be able to reconnect by itself within a few minutes.

If necessary, try the following troubleshooting tips to reconnect the device:

  • If you changed a Wi-Fi setting on your router, you must update your app with these settings. Tap ‘+’ in the top right corner of the app and re-add your device.
  • Unplug and plug the router.
  • Make sure that VPN is off and that you are not using Firewalls (for more information about, check below the Wi-Fi network requirements: 'What Wi-Fi does Blueair smart products support?').
  • Place the device closer to the router.
  • Check to see if the Wi-Fi is busy with other devices.

What Wi-Fi does your Blueair product support?

2.4 GHz standard Wi-Fi access point (b, g or n).

All standard signal encryptions: WEP, WPA, WPA2, TKIP, AES.

Un-encrypted wireless connections (i.e. Open) Please note: Professional versions of the protocols which require a certificate are not supported. This can be the case for company networks.

Captive portals are not supported. This is when you need to enter a username and password to access internet, such as in airports or public places.

An access point that broadcasts multiple SSIDs networks or on multiple channels simultaneously may create problems of data packets being lost. This is especially the case in pairing products to the app.

Make sure that no firewall blocks outgoing connections (blocking inbound connections is OK) or any restrictions on protocols such as http/https or sockets.

If your air purifier is connected to wi-fi, you can control the light on your device in the app.

For more information, please see the User Manual in our Customer Support section.

  • Place your Blueair device and your phone in the same room as the router.
  • Ensure that the Wi-Fi is functioning (turn off/on Wi-Fi from your phone).
  • Make sure that the Wi-Fi signal is strong from your phone.
  • Make sure your Wi-Fi is not busy with many other connected devices or downloads.
  • Reboot the router and try to connect your Blueair device to the Wi-Fi again.

If you’ve tried all those approaches and you are still having connectivity issues, try to connect your Blueair device to your phone’s private internet connection (hotspot). Go to the settings of your phone, activate the hotspot. Then go to the Blueair app add your device.

Sense+ user manuals
Certifications and other documents

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Email Phone

+632 8821 2275


Makati Showroom

1028 Arnaiz St, Pasay Road Makati City (beside Western Appliance).

Monday - Sunday 10:00 - 19:00


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Monday - Sunday 11:00 - 19:00

Level 4, Shangri-La Plaza, EDSA Mandaluyong City

+632 8643 3456

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