- Robot vacuums
- Robot vacuum
Error 3
eufy Error 3 on robot vacuum: side brush stuck (RoboVac)
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
RoboVac Error 3 means the side brush may be stuck. Turn off the robot, use a Phillips screwdriver to unscrew the side brush, unwind any hair or string wrapped between the main unit and the side brush, wash it with water and let it dry completely before reuse.
Safety first
Stop and check this first
- Always turn off RoboVac and unplug the adapter before unscrewing or cleaning the side brush, and only use the side brush when it is completely dry after 24hr of air-drying.
- Disassembling the device should be done by a qualified professional; do not open the robot housing beyond official eufy support instructions.
Safe checks you can perform
- Clear cords, small objects, and rug tassels around the side brush
- Unscrew and clean the side brush with a Phillips screwdriver
- Replace the side brush if bent or visibly worn
- Check for a clicking sound when turning by hand and restart the X8
Leave these tasks to a qualified professional
- Do not attempt this professional task: Side brush motor replacement or official eufy diagnosis
- Do not attempt this professional task: Supply of an official replacement side brush for your RoboVac series
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Side brush motor replacement or official eufy diagnosis
What they doIf Error 3 continues after cleaning and replacing the side brush, or if rotating the brush manually produces a clicking noise, eufy support or service evaluates replacing the side brush motor.
They must show youthe shaft rotation check and whether the clicking noise or jam comes from the side brush motor.
In writingthe Error 3 diagnosis, the part reference for the replaced side brush motor, and warranty coverage.
Supply of an official replacement side brush for your RoboVac series
What they doWhen the side brush is bent or worn and you have already used the spare included in the box, eufy support confirms the exact replacement part for your model.
They must show youthat the replacement side brush matches your X8, LR20, LR30, or L35 series robot.
In writingthe official part reference and the price or warranty coverage.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Clear cords, small objects, and rug tassels around the side brush
- Who:
- you, with RoboVac turned off and the adapter unplugged.
- How:
- check whether the side brush has caught a power cord, small object, or tasseled rug edge. The X8 manual advises organizing wires with the 5 supplied cable ties and folding tasseled rug edges underneath.
- Result that matters:
- the area around the side brush is free of cords, tassels, and foreign objects.
- If a cord or tassel was caught:
- free it gently and also inspect underneath the side brush.
- If nothing is visible from the outside:
- proceed to unscrew the side brush to clean the shaft.
- Evidence to keep:
- a photo of the object or cord caught in the RoboVac side brush.
Evidence: X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution · RoboVac X8 Owner's Manual
Unscrew and clean the side brush with a Phillips screwdriver
- Who:
- you, with the device powered off on a stable surface.
- How:
- following the X8 manual, use a Phillips screwdriver to unscrew the screw on the side brush, remove the brush, and carefully unwind and pull off any hair or string wrapped between the main unit and the side brush. Clean the brush with water for 1 min and air-dry completely for 24hr before next use.
- Result that matters:
- the shaft and side brush are free of hair and string and completely dry.
- If wrapped hair or string comes off:
- wait until the side brush is completely dry, screw it back on, and test Error 3.
- If the side brush is bent or damaged:
- replace it with the additional side brush included in the box.
- Evidence to keep:
- a photo of the side brush shaft before and after removing wrapped hair.
Turn off RoboVac before using the Phillips screwdriver, and only use the side brush when it is completely dry.
Evidence: X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution · RoboVac X8 Owner's Manual
Replace the side brush if bent or visibly worn
- Who:
- you, with a Phillips screwdriver and the robot turned off.
- How:
- if the bristles are bent or damaged after use, unscrew the screw with a Phillips screwdriver, pull off the old side brush, snap the new one into place, and screw down the screw, as the X8 manual instructs (clean once every month, replace every 3-6 months).
- Result that matters:
- the new side brush is fastened with its screw and turns without rubbing.
- If the new side brush turns smoothly and Error 3 clears:
- keep cleaning it once every month.
- If you hear a clicking sound when turning it by hand or Error 3 stays:
- check manual rotation and restart.
- Evidence to keep:
- a photo comparing the old bent side brush with the newly installed replacement.
Do not force the shaft or overtighten the side brush screw when fastening the replacement brush.
Evidence: X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution · RoboVac X8 Owner's Manual
Check for a clicking sound when turning by hand and restart the X8
- Who:
- you, with the side brush installed.
- How:
- rotate the side brush manually to check whether there is a clicking sound from the side brush motor, as eufy's support article describes. Then press and hold the button for 3 seconds to turn RoboVac off, wait 3 seconds, and press and hold for 3 seconds to turn it back on.
- Result that matters:
- the side brush turns without clicking and RoboVac cleans without repeating Error 3.
- If there is no clicking noise and it cleans normally after the 3-second restart:
- the jam is resolved.
- If the motor makes a clicking sound or Error 3 returns:
- contact eufy support.
- Evidence to keep:
- a short video showing the sound when turning the side brush manually and the Error 3 voice alert.
Evidence: X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution · RoboVac X8 Owner's Manual · What if my RoboVac has a clicking noise in the side brush?
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Robot vacuums
- Brand
- eufy
- Product type
- Robot vacuum
Known code variants
- ---3
- A side brush is stuck
- Cepillo lateral atascado
- Código de error 3
- El módulo de cepillado lateral es anormal
- Err 3
- Error 3
- Error 3 cepillo lateral
- Error 3 side brush
- Error Code 3
- Error de memoria
- eufy Error 3
- eufy RoboVac Error 3
- eufy side brush stuck
- Falla en la memoria Fleck
- Fleck ---3
- Fleck 5600SXT Error 3
- Fleck Err 3
- Fleck Error 3
- Hay un cepillo lateral atascado
- Memory Error
- RoboVac Error 3
- Rowenta error 3
- Rowenta Error S3
- Rowenta Error W3
- Side brush stuck
- The side brushing module is abnormal
- X-plorer error 3
What it means
In eufy's voice alert table for the X8, LR20, LR30 and L35 series, and in the RoboVac X8 Owner's Manual, Error 3 means the side brush is stuck. eufy instructs you to clean the side brush and try again, or replace it with a new side brush if bent or damaged; it also lists Error S3 separately for checking whether the side brush is caught on an unknown object before restarting. In eufy's support article on side brush clicking noises, a clicking sound when turning the side brush by hand points to the side brush motor. Error 3 by itself never proves that the side brush motor or brush is defective.
Warnings and stop conditions
- Mediumsource verified
Always turn off RoboVac and unplug the adapter before unscrewing or cleaning the side brush, and only use the side brush when it is completely dry after 24hr of air-drying.
Evidence: RoboVac X8 Owner's Manual
- Lowsource verified
Disassembling the device should be done by a qualified professional; do not open the robot housing beyond official eufy support instructions.
Evidence: RoboVac X8 Owner's Manual · What if my RoboVac has a clicking noise in the side brush?
Symptoms and causes
Probable causes · in order
- Hair or string wrapped between the main unit and side brushCommon
The RoboVac X8 manual explains that foreign substances such as hair or string easily get tangled in the side brush and wrapped between the main unit and the brush.
Evidence: X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution · RoboVac X8 Owner's Manual
- Power cords, small floor objects, or rug tasselsPossible
The manual warns that power cords, small objects on the floor, tasseled rug edges, or rugs thicker than 1.02 in/26 mm can entangle RoboVac during cleaning.
Evidence: X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution · RoboVac X8 Owner's Manual
- Side brush bent or worn after extended usePossible
Both the voice alert table and the X8 manual advise replacing the side brush when it becomes bent or damaged; the manual recommends replacement every 3-6 months.
Evidence: X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution · RoboVac X8 Owner's Manual
- Side brush motor fault or internal clicking noiseLess common
According to eufy's support article, if you hear a clicking sound when rotating the side brush manually or Error 3 persists after cleaning and replacement, the side brush motor may need replacement.
Evidence: X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution · What if my RoboVac has a clicking noise in the side brush?
Virtual technician
Does Error 3 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
X8/LR20/LR30/L35 Series RoboVac Voice Alerts and Solution
eufy · 2026 · official_doc
- 2
eufy · 2026 · official_doc
- 3
What if my RoboVac has a clicking noise in the side brush?
eufy · 2026 · official_doc
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