ECOVACS Error 4 beeps — Low battery or main brush jam
DIRECT ANSWER
COMMON CAUSES · RANKED
Flashing red — battery ran out mid-clean MOST COMMON
The official fix is simply to place the robot on the charging dock by hand — it drained before it could get itself home.
Solid red — hair wrapped around the main brush
The manual maps solid red plus four beeps to the main brush and sends you to its cleaning routine — hair around the roller and its end caps stalls the motor.
Battery no longer holding a charge UNCOMMON
A robot that four-beeps minutes after leaving the dock has a worn pack — replacement is the fix once charging contacts are ruled out.
HOW TO FIX IT
Hold the multi-function cleaning tool by its grip — ECOVACS' manual warns its cutting edges are sharp — and cut wrapped hair away from your fingers.
Read the LED first
Flashing red — go to charging. Solid red — go to the main brush.
Dock the robot by hand
Place it on the charging dock so both charging contacts touch; leave it until the battery recovers.
Clear the main brush
Power off, flip the robot, press the two tabs to remove the brush cover, lift out the roller, and cut away wrapped hair with the cleaning tool.
Clean the brush ends and refit
Clear the end caps and bearings too, then click the roller and cover back in and restart.
Replace a worn battery
If a full overnight charge still ends in four beeps within minutes, fit a replacement battery — power off before opening the battery door.
COMPATIBLE PARTS
As an Amazon Associate, RoboFaults earns from qualifying purchases. Prices are shown on the retailer's site.
Main brush — N79 family & DEEBOT 500/600/601/661
ECOVACS' official schedule cleans the roller weekly with the multi-function tool (careful — its edges are sharp) and replaces it every 6-12 months; a solid-red four-beep alarm that survives cleaning means the bristles are done.
Compatibility and replacement details → Check price on Amazon ↗
Replacement battery — N79 family
ECOVACS does not sell N79 packs self-serve — the market is aftermarket only, so buy a known brand with real reviews. Switch the robot off before opening the screwed battery door, never fit a swollen or hot pack, and recycle the old one.
Compatibility and replacement details → Check price on Amazon ↗Sources
Verification
Last verified: 2026-07-07 · How we verify a fault code
Corrections
Spotted an error? Report a correction — fixes ship within 48h and are logged on this page.