error-42 Troubleshooting

Error 42 — maintenance brush jammed on the iRobot Roomba s9+

Source: iRobot support — Roomba troubleshooting Confidence: 85% Verified Aug 9, 2026

The maintenance brush is jammed and needs to be cleared.

How to fix Error 42 — maintenance brush jammed

Clear the maintenance brush

Remove the maintenance brush, clear any hair or debris, and reinstall it.

Source: iRobot support — Roomba troubleshooting Confidence: 85% Verified Aug 9, 2026
Difficulty: ★ Est. 5 min

Parts needed: iRobot s9+ Main Brush Roller, iRobot Roomba s9+ Cleaning tool, iRobot j7+ Main Brush Roller, iRobot j7 Combo Main Brush Roller, iRobot i7+ Main Brush Roller, iRobot i8+ Main Brush Roller

Replace the brush

If the brush is worn, replace it with a genuine one.

Source: iRobot support — Roomba troubleshooting Confidence: 85% Verified Aug 9, 2026
Difficulty: ★ Est. 5 min

Parts needed: iRobot s9+ Main Brush Roller, iRobot Roomba s9+ Cleaning tool, iRobot j7+ Main Brush Roller, iRobot j7 Combo Main Brush Roller, iRobot i7+ Main Brush Roller, iRobot i8+ Main Brush Roller

Replacement parts for the iRobot Roomba s9+

iRobot s9+ Main Brush Roller iRobot Roomba s9+ Filter iRobot Roomba s9+ Left side brush iRobot Roomba s9+ Right side brush iRobot s9+ Floor Cleaning Solution iRobot Roomba s9+ Brush guard iRobot Roomba s9+ Side brush set iRobot Roomba s9+ Cable organizer iRobot Roomba s9+ Cleaning tool iRobot Roomba s9+ Charging cable iRobot Roomba s9+ Remote control iRobot Roomba s9+ Dock base pad iRobot Roomba s9+ Drive wheels iRobot Roomba j7+ Filter iRobot Roomba j7+ Left side brush iRobot Roomba j7+ Right side brush iRobot Roomba j7+ Side brush set iRobot s9+ HEPA Filter iRobot s9+ Dust Bag iRobot s9+ Dock Filter iRobot j7+ Main Brush Roller iRobot Roomba j7 Combo Filter iRobot Roomba j7 Combo Left side brush iRobot Roomba j7 Combo Right side brush iRobot Roomba j7 Combo Side brush set iRobot j7 Combo Replacement Battery iRobot j7 Combo Main Brush Roller iRobot Roomba i7+ Filter iRobot Roomba i7+ Left side brush iRobot Roomba i7+ Right side brush iRobot Roomba i7+ Side brush set iRobot Roomba i8+ Filter iRobot Roomba i8+ Left side brush iRobot Roomba i8+ Right side brush iRobot Roomba i8+ Side brush set iRobot i7+ Replacement Battery iRobot i7+ Main Brush Roller iRobot i8+ Main Brush Roller iRobot s9+ Replacement Battery iRobot s9+ Side Brush iRobot s9+ Mop Pad iRobot s9+ Water Tank Filter iRobot j7+ Replacement Battery iRobot i8+ Replacement Battery

← All iRobot Roomba s9+ error codes

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