iRobot Roomba · updated 2026-07-06

Error 6: Cliff sensors dirty or ledge

What it means

Cliff sensors are dirty, or the robot is stuck over a ledge or on a very dark floor.

The fix

Wipe the cliff sensors with a dry cloth, move the robot to a new area, and restart.

Applies to

All series

Source

Documented by established repair references (iRobot per-series charts are not directly linkable per code): https://vacuumist.com/roomba-error-codes-troubleshooting/

Fix didn't take? Charging-family errors that recur usually mean the battery — see the charging-errors guide. For anything deeper, here's who actually repairs Roombas in 2026, with published prices.