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My Philips Air Purifier does not improve the air quality

Updated on 11 July 2022
If the air quality does not improve or the air quality light does not turn blue when using your Philips Air Purifier, find out the possible causes and solutions here.

Note: All images shown below are generic representations only; there can be some differences among specific appliances.

Packaging material has not been removed

Packaging material needs to be removed from the filters of your Philips Air Purifier. Please remove all packaging materials as shown in the below picture.
Removing the packaging from your Philips Air Purifier

The standalone filters are not placed correctly

The filters need to be placed in the right order and direction for your Philips Air Purifier to function correctly. Please check the numbers and then place the filter back with the tag pointing towards you.

In the image below you can see an example of the filters our air purifiers contain (some do not contain filter B). Please check the User Manual specific to the model of you Philips Air Purifier to find out which filters it contains.  
Philips Air Purifier filters

The air quality sensor is dirty or wet

The air quality sensor in your Philips Air Purifier (indicated as figure 1 in the image below) should be dry and clean. Please check and clean it with a cotton bud if necessary.
Philips Air Purifier air quality sensor

Make sure pre-filter is clean

If your Philips Air Purifier contains standalone filters, please wash the pre-filter under a running tap. You can use a soft brush, if it is very dirty, to brush away the dust. If your Philips Air Purifier contains a cylindrical filter, please clean the pre-filter (filter surface) with a vacuum cleaner. 

You can also find step-by-step instructions specific to your model in the User Manual.

The windows are open

If the windows are open and polluted air continues coming in from outside, your purifier might not be able to improve the air quality. Please try to close all the doors/windows while operating the air purifier for at least four hours and select the highest speed mode. If PM2.5 level is more than 150, please use product in highest fan speed/turbo mode.

The room is too big

The room in which you use the air purifier is larger than the maximum size the appliance can effectively purify. Make sure the size of the room does not exceed the maximum indicated for your air purifier model.

New furniture in the room

When adding new furniture to a room, the air quality might become affected by gases it might emit. These gases should disappear gradually in the next weeks.

Check Sensitivity Mode (Applicable to AC4014 to AC4372 only)

Please operate the appliance in standard mode.



Did these steps not solve the issue? Please contact us for further assistance.

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