Indesit Biofilm / Bacterial Build-Up in Tub and Hoses

Washer-dryer has a persistent bad odour (musty or sewage smell) from the drum.

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Possible Causes

Frequent low-temperature washes, detergent residue build-up, stagnant water in sump or drain hose, blocked pump filter

How to Fix / Troubleshooting

Safety: Unplug before cleaning filters or internal hoses.

  • Clean pump filter: Remove and clean the drain pump filter of lint and debris.
  • Run maintenance wash: Run an empty 90°C cycle with a washing machine cleaner or white vinegar and baking soda to kill bacteria and dissolve residues.
  • Clean door seal: Wipe the door gasket folds with a cloth and mild detergent, removing black slime or mould.
  • Improve usage habits: Leave the door and detergent drawer slightly open between washes to allow drying. Use occasional hot washes.
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Repair Difficulty

Very Easy 1/5
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