The air quality light is red or purple too often and the PM 2.5 values shown in the app are very high all the time

Last updated 16/12/2021 11:12


  • The app shows high values too often
  • The ring on the air purifier lights up red or purple
  • My air purifier suddenly have the highest fan speed
  • The air quality light is red or purple too often

Applies to

  • AEG AX9 series air purifiers
  • AEG AX5/AX7 series air purifiers


Dust accumulated in the air quality sensor(s) can result in incorrect readings and affect the product performance. Use a vacuum cleaner with a soft brush to remove any dust that might accumulate in this area. Vacuum (at least) once a month if the product is used daily. Never use abrasive, harsh cleaning tools - this can damage the sensor.  

If the problem persists, even after multiple cleaning attempts, please contact an AEG/Electrolux service station for further guidance.

AX9 series sensor location

AX5/AX7 series sensor location


  • Dust can enter the sensor and cause the values for particles to be displayed incorrectly in the app and the air quality light to glow red on the air purifier
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