Roborock · Robot Vacuum Moderate

Error 26 — Wall sensor / cliff sensor obstructed

On newer models, this groups multiple obstacle-sensor obstructions including the bottom cliff sensors and front sensors.

Keep using it?
Yes, with caution
DIY difficulty
Easy
Verified against
global.roborock.com ↗

How to fix it

  1. Flip the robot upside down.
  2. Wipe all sensor lenses on the underside with a dry microfiber cloth.
  3. Wipe any front-facing IR windows on the bumper.
  4. Test on a normal floor.
  5. Add no-go zones in app for problem rugs.

Why it happens

Typical signs: Voice prompt 'Please clean the sensor' · App shows Error 26 · Robot stops repeatedly in same area

  • Dirty cliff sensors Dust accumulation on underside lenses.
  • Reflective floor Highly polished floor confuses sensors.
  • Black or dark rug Sensor reads dark surface as a drop.

More Roborock robot vacuum codes

Error 1 Error 1 — LDS laser distance sensor blocked or stuck Error 10 Error 10 — Filter blocked Error 11 Error 11 — Magnetic strip / no-go interference Error 12 Error 12 — Battery low, returning to dock Error 13 Error 13 — Charging error / contacts dirty Error 14 Error 14 — Battery error

All Roborock codes → All robot vacuum codes →

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: global.roborock.com.