Maintenance and care
When to change the dustbag
Change the dustbag when the colored marker in the airflow indicator fills the display.
Miele dustbags are disposable and made to be used only once. Do not attempt to reuse.
Checking the airflow indicator
Attach the standard floor brush (depending on model) to the vacuum cleaner. Perform this test with the standard floor brush only, since other attachments can affect the function of the airflow indicator.
Turn the vacuum cleaner on and select the highest power setting.
Lift the floor brush slightly off the floor. If the marker completely fills the indicator window, the dustbag needs to be changed.
How the airflow indicator works
The airflow indicator is designed to show when the bag is full of common household dust and measures the amount of air flow through the dustbag. Normal household dust is a mixture of dust, hair, carpet fluff, threads, sand, etc.
However, if fine dust, such as drill dust, sand, plaster or flour is vacuumed, the pores of the dustbag may become blocked. The marker will indicate that the bag is "full" even when it is not. The dustbag should be changed as the suction power is greatly reduced.
If the bag is bulging with pet fur, hair, carpet fluff, etc. the indicator may not register "full". This is because the air flow of the dustbag may still be high enough not to activate the marker to show maximum. The dustbag should still be changed.
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