eufy Error 4 beeps — Low battery or rolling brush stuck
DIRECT ANSWER
COMMON CAUSES · RANKED
Flashing red — battery drained flat MOST COMMON
The manual's flashing-red variant is simply low power — the fix is a manual charge of at least 5 hours.
Solid red — hair wrapped around the rolling brush
Solid red maps to a stuck rolling brush — eufy's fix cleans the brush, both of its ends, and the connectors on the vacuum.
Charging chain broken, so the battery never fills UNCOMMON
If four beeps return after every clean, check the base — white indicator lit, pins clean, and the robot docking within 6 feet.
HOW TO FIX IT
Read the LED first
Flashing red means charge the battery; solid red means clean the rolling brush.
Flashing red — charge for 5+ hours
Dock the robot (or plug it in), confirm the charging light breathes orange, and wait for solid blue before the next mission.
Solid red — clean the rolling brush
Turn off RoboVac, remove the brush guard and rolling brush, cut away wrapped hair — especially at the two ends — and clean the connectors.
Test without the brush if unsure
eufy's diagnostic — run the robot briefly on hard floor without brush guard and rolling brush — if the error stops, the brush or its drive was the jam.
COMPATIBLE PARTS
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Rolling brush — 11S, 15C, 25C & 30C RoboVacs
Clean both ends of the roller and the connectors on the vacuum when you service it — eufy's four-beep fix names those spots; replace the roller when bristles mat down.
Compatibility and replacement details → Check price on Amazon ↗Sources
Verification
Last verified: 2026-07-06 · How we verify a fault code
Corrections
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