Whirlpool Biofilm / Bacterial Growth in Tub and Sump

Dishwasher has a strong musty or moldy odor when opened.

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Possible Causes

Food residue buildup, Infrequent use, Clogged filters, Standing water in sump

How to Fix / Troubleshooting

Safety First: Use only dishwasher-safe cleaners; avoid mixing chemicals.

  • Clean filters: Remove and thoroughly wash filters with hot soapy water.
  • Clean interior: Wipe door seals, corners, and the bottom of the tub with a mild bleach solution or dishwasher cleaner (follow label directions).
  • Run cleaning cycle: Run a hot cycle with a dishwasher cleaner or a cup of white vinegar placed upright on the top rack (no dishes).
  • Leave door ajar: After cycles, leave the door slightly open to allow drying and prevent odor buildup.
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Repair Difficulty

Very Easy 1/5
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