[Fix my robot](https://robotsforthat.com/fix/) / [Roborock](https://robotsforthat.com/guides/roborock-error-codes/) / Maintenance brush jammed ● Checked Nov 3, 2026 From Roborock support Roborock error 42 # Roborock Error 42: Maintenance brush jammed, and the fix Steps **4** Tools **None** Parts Maybe filter Works for Roborock robot vacuums (S, Q, Saros and Qrevo series). Short answer **What it means:** On the S7 MaxV Ultra, S7 Max Ultra and S8 Pro Ultra, the maintenance brush in the dock is jammed. **Quick fix:** Check where the maintenance brush stopped. ## Fix it in 4 steps - Check where the maintenance brush stopped. Done? - If it stopped on the left, remove whatever is jamming it. Done? - If it stopped on the right, clean the filter. Done? - Seat the filter properly and try again. Did it work? **Fixed when:** The dock brush moves freely without the alert. Great, it is fixed. Bookmark this page in case it comes back. **Still showing Maintenance brush jammed?** The error persists after these steps. Contact Roborock support. Contact Roborock support at 1 855 960 4321 (24/7 (US)). [Roborock support →](https://support.roborock.com/hc/en-us/sections/360007120351-Troubleshooting) ## Parts that fix this **Often linked to the filter.** A clogged filter cuts suction and makes the fan work harder. **How old is your Roborock?** [Fixes this · our kit 1 year refill kit for Roborock S8, S8+ and S8 Pro Ultra 2 rubber main rollers (1 set), 4 side brushes, 4 filters, 4 mop cloths. Free US shipping · Fit guarantee $16.99 See the kit →](https://robotsforthat.com/shop/roborock-s8-refill-kit/) [Just the filter For Roborock on Amazon Check price →](https://www.amazon.com/s?k=Roborock%20replacement%20filters&tag=robotsforthatai-20)[Just the charging dock For Roborock on Amazon Check price →](https://www.amazon.com/s?k=Roborock%20charging%20dock&tag=robotsforthatai-20) Check the part fits your model. Affiliate links: we may earn a commission at no cost to you. Remind me when parts are due (one free email) ## Why it happens - Something jamming the brush (if it stops on the left) - A blocked or badly seated filter (if it stops on the right) ## Other Roborock errors [7 Wheels stuck ›](https://robotsforthat.com/fix/roborock-error-7/)[12 Battery too low ›](https://robotsforthat.com/fix/roborock-error-12/)[14 Battery error ›](https://robotsforthat.com/fix/roborock-error-14/)[15 Wall sensor dirty ›](https://robotsforthat.com/fix/roborock-error-15/)[16 Robot tilted ›](https://robotsforthat.com/fix/roborock-error-16/)[18 Fan error ›](https://robotsforthat.com/fix/roborock-error-18/)[21 Vertical bumper pressed ›](https://robotsforthat.com/fix/roborock-error-21/)[22 Dock locator error ›](https://robotsforthat.com/fix/roborock-error-22/)[23 Cannot return to the dock ›](https://robotsforthat.com/fix/roborock-error-23/)[27 VibraRise mop lift stuck ›](https://robotsforthat.com/fix/roborock-error-27/)[28 Robot on carpet ›](https://robotsforthat.com/fix/roborock-error-28/)[Internal error ›](https://robotsforthat.com/fix/roborock-internal-error/)[Fan speed lowered ›](https://robotsforthat.com/fix/roborock-fan-speed-lowered/)[No go zone or virtual wall detected ›](https://robotsforthat.com/fix/roborock-no-go-zone-detected/)[Cannot cross carpet ›](https://robotsforthat.com/fix/roborock-cannot-cross-carpet/)[Dock light steady red ›](https://robotsforthat.com/fix/roborock-dock-light-red/)[All 28 Roborock codes →](https://robotsforthat.com/guides/roborock-error-codes/) ## Keeps happening? Compare before you replace [Roborock Qrevo Curv 2 Flow $650 · Roller mop robot for mostly hard floor homes at a midrange price](https://robotsforthat.com/robot/roborock-qrevo-curv-2-flow/)[Check price on Amazon →](https://www.amazon.com/dp/B0FXG2BDTJ?tag=robotsforthatai-20) [Roborock Qrevo 2 Pro $600 · Midrange mop washing robot with auto mop removal under $600](https://robotsforthat.com/robot/roborock-qrevo-2-pro/)[Check price on Amazon →](https://www.amazon.com/dp/B0GXF7ZQPY?tag=robotsforthatai-20) [Narwal Flow 2 vs Roborock Qrevo Curv 2 Flow Point by point](https://robotsforthat.com/vs/narwal-flow-2-vs-roborock-qrevo-curv-2-flow/) **Own a Roborock? Keep it running.** Add it to My Robots. See fixes for your exact model, get an email when parts are due, and ask us to find a repair if it breaks. Free · no password [Add my robot](https://robotsforthat.com/my/?add=1) ## Questions owners ask Which Roborock models show Error 42? Roborock lists it for the S7 MaxV Ultra, S7 Max Ultra and S8 Pro Ultra docks. ## Sources - [Roborock support: Error 42 maintenance brush jammed](https://support.roborock.com/hc/en-us/articles/6569168939033-What-should-I-do-if-the-robot-alerts-Error-42-Maintenance-brush-jammed) - [Roborock support: robot vacuum user manual (errors list)](https://support.roborock.com/hc/en-us/article_attachments/4416002300441) Black Friday is Nov 27 Get the Black Friday prices on robot vacuums, mowers, pool robots, 3D printers and kits the day they drop We check prices every morning and compare them with each model's 2026 low. One email when real deals land, plus our 5 minute Friday roundup. Unsubscribe anytime. HTML version: https://robotsforthat.com/fix/roborock-error-42/