Debris can be thrown back when the bin is full, suction path is blocked, brush direction is wrong for the floor, or large pieces cannot enter the head. Empty the bin fully and test on a small amount of debris.
What this covers
- Vacuums · floor head
What it does not cover
Differential
Likely causes of “Vacuum spits dirt and debris back onto the floor”, and how to tell them apart
- 1
The bin is overfull and debris is pushed back through the inlet
What separates it Debris drops out when the machine stops and the bin is at or above the fill line.
How to confirm Empty the bin fully and test on a small amount of debris.
- 2
The airway is blocked so debris cannot travel to the bin
What separates it Debris is thrown ahead or to the side of the head and the suction feels weak.
How to confirm Clear the neck, wand and hose one section at a time.
- 3
The floor head is too low or too tight for the debris
What separates it Larger pieces are pushed instead of lifted, on a bare floor.
How to confirm Use the correct floor setting for the surface and pick up large items by hand.
- 4
A flap, seal or housing is cracked
What separates it Debris leaks from a seam or the inlet and the cracked part is visible.
How to confirm With the machine off, look over the bin seal, inlet flap and brush housing for a crack or gap.
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether debris exits from the front of the head or from the inlet.
- The floor setting in use and the size of the debris being picked up.
- Whether it happens only after the bin is more than half full.
Try in this order
0 of 4 completedObserve before changing anything
ReversibleNote whether debris exits the front of the head or falls from the inlet when power stops.
Isolate the failing boundary
ReversibleEmpty the bin, clear the neck and wand and choose the correct floor/head setting.
Apply the narrow correction
ReversibleTest slowly over a small controlled debris area with all seals latched.
Verify the result and stop at the boundary
ReversibleService is appropriate for a cracked airway, broken flap or brush housing.
Stop boundary
When this stops being a self-service repair
- !A cracked airway, broken flap or brush housing needs the specified replacement part before further use.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does debris fall back out when I switch the vacuum off?+
When the motor stops, loose debris near the inlet can drop. A full bin or a worn flap makes it worse, so empty the bin and check the flap.
Why does it spit debris?+
A full bin or blocked path.
Is brush direction relevant?+
Yes.