Air purity indicator is not changing color / not turning in blue
* Please clean pre filter with dry brush / vacuum cleaner.
* Clean air quality sensor.
* Reset the Filter.
* Check filters are placed in correct direction ( All filters are having numbering and direction tags on it – make sure tag is placed in front direction)
* If PM2.5 level is more than 150 use product in highest fan speed / turbo mode.
* Try to close all the doors / windows while operating the air purifier.
* Check sensitivity mode (Applicable to ac4014 to ac4372 only ).... Keep product in standard mode.
* Check packing material (polythene ) is removed from all filters .