How to Fix / Troubleshooting

Safety first: Keep the robot away from stairs until the issue is resolved.

Step-by-step:

Clean cliff sensors: Thoroughly wipe all underside cliff sensor windows with a microfiber cloth.
Test on safe ledge: Place the robot near a low step or dark tape line while supervising. Start cleaning and see if it stops or turns away.
Check environment: Avoid direct sunlight on the sensors and highly reflective floors that can confuse IR readings.
Advanced repair: If the robot still fails to detect drops, open it and inspect the cliff sensor module and wiring. Replace the module if defective.

When to stop: Do not use the robot near stairs until cliff detection is confirmed working.

Robot vacuum does not detect or avoid stairs and may approach edges dangerously.

Possible Causes