First check to see if there is suction at the motor duct. If not contact you local BISSELL Authorized Service Center at http://www.bissell.com/customer-support/
If there is suction,
Check if the small rounded window tabs on the Floor Nozzle are locked in
their mating slots and not inadvertently lifting the tank up out of place?
Check to ensure oval seal is in place at the top of floor nozzle window.
Check the diverter knob for proper setting and the diverter door opens and
closes properly. If no, and it does not appear to be broken, remove the floor nozzle window, open diverter door manually, keeping the flat
side of the door against the unit. Set the diverter knob on the tools setting.
Manually close diverter door until there is resistance, hold it in place while
turning the diverter knob towards the floor setting to lock it back in place.
Reinstall the floor nozzle window. (If diverter door will not lock back in place,
go to a BISSELL Authorized Service Center).
Check for the black foam gasket under the diverter door. Replace if
Check floor nozzle window to ensure it is screwed down properly. If there is
a ¼" gap between the window, where it wraps around to the side of the
unit, and the base on the slanted section, reinstall window.
This gap can be eliminated by installing the tabs at the top of the window,
hold it in place, then push up from the bottom of the window to bow the
window, push it against the unit and then evenly slide it down into place.
Check half moon window to ensure it is screwed down properly on
CleanView models. The floor nozzle window should be lower to the floor
then the half moon window.
Make sure tank is not full on the outside of the bladder.
Check the tank lint screen for debris. Remove it to check.
Check tank lid and tank for damage.
Check float and baffle to ensure they are properly installed properly. The
baffle should be even with the top of the tank