Philips Air Purifier Not Changing Color

My philips air purifier does not improve the air quality.
Philips air purifier not changing color. Air purity indicator is not changing color not turning in blue. Device 1 my philips air purifier s airflow is weak and the light is not blue. Please clean pre filter with dry brush vacuum cleaner.
Indication lights 2 my philips air purifier s air quality ring color does not change. Clean air quality sensor. Please clean pre filter with dry brush vacuum cleaner.
A light is flashing in my philips air purifier. Please clean pre filter with dry brush vacuum cleaner. If the quality of the air outside is bad make sure to close all windows so the air that is purified does not become polluted again.
My philips air. Indication lights 1 my philips air purifier s air quality ring color does not change. Performance 2 my philips air purifier does not remove odors properly.
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. My philips air purifier s filter replacement indication stays on. When polluted air continues entering your room then the air that has been cleaned your air purifier will be replaced by new polluted air.
My philips air purifier is too loud. Indication lights 1 my philips air purifier s air quality ring color does not change. If the air quality does not improve when using your philips air purifier there might be some possible causes.