Bosch Microbial Growth in Tanks and Hoses

Carpet cleaner leaves a musty or moldy smell during use

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Possible Causes

Dirty water left in tank, Damp machine stored without drying, Biofilm in hoses, Contaminated brush roll

How to Fix / Troubleshooting

Safety first: Unplug the unit and wear gloves when handling dirty water or moldy components.

  • 1. Deep clean tanks
    • Empty and wash both clean and dirty water tanks with warm soapy water.
    • Rinse with a mild disinfectant solution safe for plastics, then rinse again with clean water.
  • 2. Flush hoses
    • Fill the clean tank with warm water and a small amount of approved cleaner.
    • Run the unit briefly to flush solution and suction hoses, then empty the dirty tank.
  • 3. Clean brush roll and nozzle
    • Remove the brush roll and wash it thoroughly; allow it to dry completely.
    • Wipe the nozzle and underside of the machine.
  • 4. Dry thoroughly before storage
    • Leave tanks and covers open to air dry.
    • Store the machine in a dry, ventilated area.
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Repair Difficulty

Very Easy 1/5
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