Maintenance
When to change the filter bag
Change the filter bag when the colored marker in the filter bag change indicator is completely red.
Miele dust bags are disposable. Dispose of full filter bags. Do not attempt to reuse.
Blocked pores reduce the suction of the vacuum cleaner.
Checking the filter bag change indicator
Attach the rug and floor tool to the vacuum cleaner. Other attachments can affect the function of the filter bag change 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 filter bag needs to be changed.
How the filter bag change indicator works
The filter bag change indicator is designed to show when the bag is full of common household dust and measures the amount of air flow through the filter bag. 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 filter bag may become blocked. The marker will indicate that the bag is "full" even when it is not. The filter bag 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 filter bag may still be high enough not to activate the marker to show maximum. The filter bag should still be changed.
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