Philips Support

What to do when the Air Purifier Air Quality Indicator does not turn Blue

Published on 04 April 2023

Air purity indicator is not changing colour/is not turning blue

  • Please clean the pre-filter with a dry brush/vacuum cleaner
  • Clean the air quality sensor
  • Reset the filter
  • Make sure that the filters are placed facing the correct direction (all filters have numbering and direction tags on them. Make sure that the tag is facing forwards)
  • If the PM2.5 level is higher than 150, use the product on the highest fan speed/in turbo mode
  • Try to keep all doors/windows closed while operating the air purifier
  • Check sensitivity mode (applies to AC4014 TO AC4372 only). Keep the product in standard mode
  • Make sure that packing material (polythene) is removed from all of the filters

How to reset the Filter

Attachment - How to reset the Filter

How to change sensitivity

Attachment - Changing Sensitivity

The information on this page applies to the following models: AC1215/70 .

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