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:
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Unplug the device before cleaning.
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Use a soft, clean cloth to wipe down the top and exterior surfaces.
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Avoid harsh chemicals, gasoline, or solvents, as these can damage the casing and electronics.
2. Pre-Filter Maintenance
Frequency: Every 2–4 weeks (more often if you have pets or high dust levels)
What to Do:
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Vacuum using a soft brush attachment
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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:
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Follow the step-by-step replacement instructions in the manual.
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After replacing, reset the filter indicator by:
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Holding the Fan Speed button for 15 seconds, or
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Using the Blueair app
5. Sensor Care (Air Quality Sensors)
Frequency: If air quality readings seem inaccurate
What to Do:
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Power off the device
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Clean around the sensor vents with a dry cloth or low-suction vacuum
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Restart the unit