• Remove the plastic wrap from the filter before using the air purifier. Operating the unit with the packaging still on will prevent proper filtration.

• Use in an appropriately sized room—not larger than the recommended capacity of 705 sq. ft.

• Allow for proper airflow—place the purifier where air can circulate freely around it.

• Maintain clearance—keep at least 4 inches (10 cm) between the unit and surrounding objects.

• Close doors and windows while the purifier is operating to prevent new pollutants from entering.

• Replace the filter when the indicator on the control panel alerts you—this is crucial for maintaining performance.

• Follow routine maintenance as outlined in your user manual.

• Make sure the device is powered on
• Plug in your air purifier and press the On/Standby button if it isn’t already running.
• Locate the On/Standby Button
• This is the power button, usually marked with a circle and vertical line (⏻) icon.
• Press and hold the On/Standby button for 15 seconds.
• Wait for Confirmation
• The display will blink or reset to indicate the factory settings have been restored.

• The device will forget all Wi-Fi and app pairings
• Display lock, fan settings, and Eco Mode (if enabled) will return to defaults
• You’ll need to reconnect via the Blueair app to use smart features again

• If the purifier is not responding to controls
• When changing Wi-Fi networks
• Before transferring ownership to someone else
• To clear persistent error states or connectivity issues

To keep your Blue Signature air purifier operating at peak performance, Blueair recommends a combination of routine cleaning, filter care, and safety checks. Below is a complete breakdown of the recommended maintenance tasks:

Frequency: Monthly or as needed

What to Do:

• Unplug the device before cleaning.
• Use a soft, clean cloth to wipe down the top and exterior surfaces.
• Avoid harsh chemicals, gasoline, or solvents, as these can damage the casing and electronics.

Frequency: Every 2–4 weeks (more often if you have pets or high dust levels)

What to Do:

• Vacuum using a soft brush attachment
• Or wash it according to label instructions and air dry thoroughly before reattaching

Frequency: Every 9–12 months, or when the filter replacement indicator turns red

What to Do:

• Follow the step-by-step replacement instructions in the manual.
• After replacing, reset the filter indicator by:
• Holding the Fan Speed button for 15 seconds, or
• Using the Blueair app

Frequency: If air quality readings seem inaccurate

What to Do:

• Power off the device
• Clean around the sensor vents with a dry cloth or low-suction vacuum
• Restart the unit

• Unplug the device, then inspect the power cable for any visible damage. If damaged, discontinue use and contact Blueair Customer Support.
• Plug the power cable firmly into a working electrical outlet.
• Press the On/Standby button or select a fan speed from the control panel (depending on your model).
• Check for:
• LED indicators lighting up.
• Airflow coming from the outlet (place your hand over it to feel for moving air).

• Try plugging the air purifier into a different outlet.
• Test the original outlet with another device (e.g., a lamp) to ensure it’s working properly.

• If your air purifier is Wi-Fi enabled, connect it to the Blueair App to ensure it has the latest firmware update.
• If using a power converter, confirm that the unit’s voltage requirements (see the rating label) match your country’s electrical standards.

• Press and hold the power button until all LEDs blink four times—this may take 15–30 seconds depending on the model.
• Wait—do not press any buttons. After about 5 seconds, all LEDs will blink twice to confirm the reset, including the red filter indicator.
• The unit will enter Standby Mode once the reset is complete.
• Re-connect the air purifier to the Blueair App, if applicable.