Do you mean the "bag"? If so you have a clog. The first thing is to check is the on board tool hose. Remove the hose from the machine and check suction at the end of the hose. If you have no suction there the clog is between the end of the hose and the bag. Open the bag door and remove the bag. You will have to use a coat hanger wire, make a small turn at one and slowly put it though hose to unclog. If you have suction there, check the section of hose between there and the head of the vacuum with coat hanger wire. If nothing there, then remove the base plate and check the inlet for the dirt there. You should also check to make sure the belt still turns the brush roller, if not replace it.
Answers & Comments
Do you mean the "bag"? If so you have a clog. The first thing is to check is the on board tool hose. Remove the hose from the machine and check suction at the end of the hose. If you have no suction there the clog is between the end of the hose and the bag. Open the bag door and remove the bag. You will have to use a coat hanger wire, make a small turn at one and slowly put it though hose to unclog. If you have suction there, check the section of hose between there and the head of the vacuum with coat hanger wire. If nothing there, then remove the base plate and check the inlet for the dirt there. You should also check to make sure the belt still turns the brush roller, if not replace it.