Why is my Roborock E4 brush error?

Common causes include software issues, connectivity problems, and settings misconfigurations. Follow our guide to fix your Roborock E4.

How do I fix Roborock E4 brush error?

Start by restarting your device, checking connections, and updating firmware. Our step-by-step guide provides detailed instructions.

When should I call support for my Roborock E4?

If troubleshooting doesn't resolve the issue, or you encounter persistent errors, contact a certified Roborock technician.

Roborock E4 Brush Error

A Roborock E4 brush error can stop your robot vacuum mid-clean and leave debris behind on your floors. This common issue usually appears when the main brush becomes clogged with hair, tangled around bearings, or when the brush module encounters resistance it can't overcome. The good news: most brush errors on the Roborock E4 are fixable at home with basic cleaning and maintenance. This guide walks you through proven troubleshooting steps to clear the error and restore normal cleaning performance.

Common Causes of Roborock E4 Brush Errors

The Roborock E4 uses a single main brush with end bearings that can trap hair and fibers. When too much debris accumulates, the motor detects abnormal resistance and triggers a brush error. Other causes include worn brush bearings, foreign objects stuck in the brush compartment, or a brush that wasn't reinstalled correctly after cleaning. Understanding these triggers helps prevent the error from returning.

How to Fix a Roborock E4 Brush Error

Power Off and Flip the Robot: Turn off your Roborock E4 using the power button, then flip it over to access the underside. Place it on a clean, flat surface with the brush compartment facing up. This prevents accidental startup and gives you clear access to the main brush.

Remove the Main Brush: Locate the main brush cover between the two wheels. Press the two release tabs on the brush cover simultaneously and lift it off. Grasp the brush by its tab end, pull it straight out from the brush slot, and set the cover aside.

Clear All Hair and Debris: Use a pair of scissors to carefully cut away any hair wrapped around the brush bristles. Peel the hair off in sections rather than pulling, which can damage the bristles. Pay special attention to the brush bearings at both ends—hair often winds tightly around these spinning parts and is the leading cause of a persistent Roborock E4 brush error.

Clean the Brush Bearings and Compartment: Remove the small bearing caps from each end of the brush by pulling them straight off. Clean out any packed hair or dust inside the bearings using a cotton swab or old toothbrush. Wipe down the empty brush compartment with a dry cloth to remove accumulated dirt that could cause friction.

Inspect for Damage and Reinstall: Check the brush for cracked or flattened bristles, and spin the bearings by hand—they should turn freely without grinding. If bearings feel rough or seized, the brush needs replacement. Reinsert the brush with the tab end matching the slot orientation, press until it clicks, and snap the cover back into place.

Test and Reset: Flip the robot upright, power it on, and start a short cleaning cycle. Listen for smooth brush rotation without clicking or straining sounds. If the Roborock E4 brush error persists, remove the brush again and check for missed debris, or perform a factory reset through the Mi Home app under Device Settings > Factory Reset.

Warning: Never operate your Roborock E4 without the main brush installed—this can damage the brush motor and void your warranty. Always ensure the brush cover is fully latched before running the robot, as loose covers can trigger false error codes or allow debris into sensitive components.

Preventing Future Brush Errors

Regular maintenance keeps brush errors at bay. Clean the main brush weekly if you have pets or every two weeks for normal use. Replace the brush assembly every 6-12 months depending on wear. Empty the dustbin frequently so the vacuum doesn't work harder to pull debris through, which strains the brush motor. These habits minimize the chances of encountering another Roborock E4 brush error and extend your vacuum's lifespan.

Frequently Asked Questions

Why does my Roborock E4 keep saying "brush error" even after cleaning?

If cleaning doesn't resolve it, the brush bearings may be worn internally or the brush motor sensor could be faulty. Try a replacement brush first—if the error continues, the motor or mainboard likely needs professional diagnosis.

Can I use a third-party replacement brush for the Roborock E4?

Yes, many compatible brushes work well, but genuine Roborock brushes typically fit more precisely and have better bearing quality. Poorly fitted third-party brushes can cause binding and trigger false brush errors.

How often should I replace the main brush on my Roborock E4?

Replace the main brush every 6-12 months with regular use, or sooner if bristles appear flattened, bearings feel gritty, or the brush error returns frequently despite thorough cleaning.

Still Need Help With Your Roborock Device?

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