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
