Built-in dishwasher with the door open and racks pulled out
Generic photo: Castorly Stock · Pexels License

Dishwasher noisy (grinding, humming, thumping)

Grinding is usually debris at the pump or chopper; loud humming is a stalled or starved pump; thumping is spray arms hitting items.

Cross-checked ~45 min moderateBrands: All

Before you start

  • Power off before reaching into the sump

Diagnostic steps

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work.

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Dishwasher noisy (grinding, humming, thumping) · OnCall Tech