The pores in the dust-bag of your Philips Vacuum Cleaner may become clogged (i.e. after vacuuming ashes, fine sand, lime, cement dust or other similar substances).
If you have checked the above-mentioned possibilities and the appliance still indicates the bag is full, please replace the disposable dust bag or empty the reusable dust bag, even if it is not full yet.
Did these steps not solve the issue? Please contact us for further assistance.