A: There is no bag inside.
B: Defective bag safety switch.
C: Loose connection somewhere.
D: Motor has worn carbon brushes or an open winding.
E: Problem with air valve (if equipped)
Problems B thru E will require dismantling the unit and testing of components. A good vacuum shop with the proper knowledge can find the root of the problem for you. If you need more help or parts, our email is arctic@worldlynx.net
www.vacuumcleanerhelp.com, February 2007