KitchenAid Biofilm and Mold Buildup

Washer has a strong musty or moldy odor, especially from the drum or door area.

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Possible Causes

Detergent residue on drum and tub, standing water in door bellow folds, infrequent hot washes, clogged drain causing residual water

How to Fix / Troubleshooting

Safety First: Unplug the washer before cleaning internal rubber parts. Avoid mixing cleaning chemicals.

Step-by-step cleaning:

  • Clean door bellow: Wipe the gasket folds with a cloth soaked in a 1:1 solution of white vinegar and water or a manufacturer-approved cleaner. Remove all visible residue.
  • Run cleaning cycle: Use the washer's "Clean Washer" cycle if available, with a washer cleaner tablet or 1 cup of white vinegar (no clothes).
  • Clean dispenser: Remove and wash the detergent drawer and housing to remove buildup.
  • Improve ventilation: After each use, leave the door and dispenser drawer slightly open to allow drying.

When to replace: If the door bellow is heavily stained or retains odor even after cleaning, consider replacing it. Also address any drain issues that leave standing water.

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Repair Difficulty

Very Easy 1/5

Required Part

Door Bellow (Door Gasket)
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