Official support source
Four beeps + solid red: Rolling brush stuck
eufy · RoboVac models covered by the linked article · reviewed 2026-09-03
What it means
The rolling brush cannot rotate normally.
Safe checks from the manufacturer
- Remove the rolling brush and side brushes and clear both brush ends and connectors.
- Reinstall them after charging the RoboVac fully.
Open the official support page
Stop if the error returns
Do not open a battery, charging dock, motor or sealed electrical assembly. Use the manufacturer support route.