Bosch Uneven Brush Contact / Contaminated Nozzle

Carpet cleaner leaves streaks or dirty lines on carpet after passes

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Possible Causes

Worn or uneven brush bristles, Clogged suction slot, Warped nozzle plate, Incorrect brush height setting

How to Fix / Troubleshooting

Safety first: Unplug the unit before inspecting the cleaning head.

  • 1. Inspect brush roll
    • Check for flattened or missing bristles.
    • Replace the brush roll if bristles are worn unevenly.
  • 2. Clean suction slot and nozzle
    • Remove any lint or debris from the suction slot.
    • Wipe the nozzle plate to ensure smooth contact with the carpet.
  • 3. Adjust height (if available)
    • Set the cleaning head height appropriate for your carpet type.
    • Too high or too low can cause streaking.
  • 4. Slow down cleaning passes
    • Move the cleaner more slowly to allow proper agitation and extraction.
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Repair Difficulty

Very Easy 1/5

Required Part

Brush Roll Assembly
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