iRobot · Robot Vacuum Moderate
Error 9 — Bumper stuck or sensor dirty
The front bumper is stuck in the pressed-in position or its sensor cannot detect movement.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Easy
- Verified against
- homesupport.irobot.com ↗
How to fix it
- Tap the bumper firmly several times — you should feel it click and spring back smoothly.
- Use compressed air to blow out the gap around the entire bumper perimeter.
- Wipe the bumper edges with a slightly damp cloth and dry.
- For persistent issues, remove the top cover (model-specific) and clean around the bumper switch.
- Press CLEAN to test. If bumper feels loose or won't spring back, the bumper assembly needs replacement.
Why it happens
Typical signs: 'Error 9, tap Roomba's bumper to clean' · Bumper feels stuck or doesn't spring back fully · Visible debris around bumper gap
- Debris jammed in bumper gap Hair, dirt, or grit in the gap between the bumper and the robot body prevents free movement.
- Bumper sensor obstructed Dust on the internal bumper switch or sensor.
- Bumper spring damaged or detached After impacts the internal spring can break or come unseated.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
- Compressed air can Common replacementAmazon →
More iRobot robot vacuum codes
Charging Error 2 Charging Error 2 — Battery not detected Charging Error 3 Charging Error 3 — Battery won't charge Charging Error 5 Charging Error 5 — Charging system fault Error 1 Error 1 — Side wheel stuck / off ground Error 10 Error 10 — Drive wheel not turning Error 11 Error 11 — Bin full or airflow blocked
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: homesupport.irobot.com.