Roborock · Robot Vacuum Moderate

Error 15 — Wall sensor dirty

The side wall-following IR sensor is dirty or blocked, preventing the robot from cleaning along walls.

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

How to fix it

  1. Locate the wall sensor — a small IR window on the right-front side of the robot.
  2. Wipe it gently with a dry microfiber cloth.
  3. If smudged, use a slightly damp cloth and dry thoroughly.
  4. Remove any packaging stickers nearby.
  5. Restart cleaning.

Why it happens

Typical signs: Voice prompt 'Wall sensor is dirty' · App shows Error 15 · Robot won't follow walls · Robot bumps walls hard repeatedly

  • Dust on wall sensor lens Side-facing IR window collects dust.
  • Sticker or label covering sensor Packaging residue on the side panel.
  • Sensor failure Internal IR LED or receiver damaged.

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.