● Checked Nov 3, 2026From Roborock support
Roborock error42
Roborock Error 42: Maintenance brush jammed, and the fix
Steps4
ToolsNone
PartsMaybe 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 →
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 kit1 year refill kit for Roborock S8, S8+ and S8 Pro Ultra2 rubber main rollers (1 set), 4 side brushes, 4 filters, 4 mop cloths. Free US shipping · Fit guarantee$16.99See the kit →Just the filterFor Roborock on AmazonCheck price →Just the charging dockFor Roborock on AmazonCheck price →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
7Wheels stuck›12Battery too low›14Battery error›15Wall sensor dirty›16Robot tilted›18Fan error›21Vertical bumper pressed›22Dock locator error›23Cannot return to the dock›27VibraRise mop lift stuck›28Robot on carpet›Keeps happening? Compare before you replace
Roborock Qrevo Curv 2 Flow$650 · Roller mop robot for mostly hard floor homes at a midrange priceCheck price on Amazon →
Roborock Qrevo 2 Pro$600 · Midrange mop washing robot with auto mop removal under $600Check price on Amazon →
Narwal Flow 2 vs Roborock Qrevo Curv 2 FlowPoint by pointQuestions owners ask
Which Roborock models show Error 42?
Roborock lists it for the S7 MaxV Ultra, S7 Max Ultra and S8 Pro Ultra docks.