my vacuum cleaner, the motor is running, the hose and bag are clear but it is not picking up, there seems to be no suction. I am not sure what make and model it is.
if your sure that there is no blockage in the pipes (if it is a flexible pipe try dropping a marble or something like down the tube) then check all the filters, dyson and panasonic use a foam filter that really does get cloged and needs washing out. Also if it is an upright vac remove the beater bar and check the inlet tube from that end
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix vacuum cleaners.