Roomba Error 9 — Bumper Stuck Fault

What Does This Error Mean?

Error 9 means the front bumper is stuck in the pressed position — the Roomba thinks it's permanently colliding with something.
Tap the bumper a few times to free it.
If it stays stuck, debris is wedged in the bumper rails or the bumper sensor has failed.
Most cases clear with a quick tap.

Affected Models

Roomba i7
Roomba j7
Roomba s9
Roomba 980
Roomba 692

Common Causes

Bumper physically stuck — debris wedged in the rails behind the bumper
Bumper sensor (one of two infrared switches) failed in the pressed state
Bumper deformed from a previous hard collision
Hair wrapped behind the bumper preventing free movement
Internal connector to the bumper sensor loose

How to Fix It

Tap the front bumper firmly several times.

Press in and release the bumper four or five times — it should move freely with a small click on each press.
If it feels stuck or sluggish, debris behind it is the cause.
Most Error 9 events clear with this single step.
Look at the gap between the bumper and the body.

The bumper should sit a millimetre or two away from the body when at rest.
If you see the gap closed on one side, debris is wedged behind it pushing it inward.
That's what the sensor is reading as a permanent collision.
Clear debris from behind the bumper.

Use compressed air or a soft brush to clear hair, dust, and small particles from the rails behind the bumper.
If you can pop the bumper off — most models have it on simple clips — clean the area and snap it back on.
Restart on a flat surface.

Set the Roomba on the floor away from any walls or furniture.
Press Clean.
The Roomba runs a self-test that includes pressing the bumper sensors briefly.
If Error 9 returns, the bumper sensor itself has failed and needs service.

Frequently Asked Questions

Why does Error 9 happen mostly after the Roomba bumps something hard?

Hard collisions can deform the bumper or push debris into the rails.
Either way, the bumper stops moving freely and the sensor reads it as permanently pressed.
Most modern Roombas have impact sensors that slow them before collision, but corner-on hits and high-speed encounters with table legs can still happen.

Can I replace the Roomba bumper myself?

On most models, yes.
The bumper assembly comes off with a few clips and one connector.
iRobot sells replacement bumpers for $15–$30.
Total time is about 10 minutes once you've watched a model-specific replacement video.