American Standard Foreign Object in Grinding Chamber

Disposal runs but makes loud rattling, clanking, or grinding noises not typical of normal operation.

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Possible Causes

Metal utensil dropped into disposal, Small stones or bone fragments, Loose screws or hardware inside chamber, Broken pieces of impeller or shredder ring

How to Fix / Troubleshooting

Safety first: Turn OFF the switch and shut OFF the breaker. Never reach into the disposal with your hand.

  • Visual inspection: Shine a flashlight into the American Standard disposal. Look for foreign objects such as spoons, bottle caps, or glass.
  • Remove debris: Use long-handled tongs or pliers to carefully remove any objects. Rotate the turntable with a wooden stick to expose hidden items.
  • Check impeller arms: Ensure the impeller lugs move freely and are not broken off.
  • Test briefly: Restore power, run water, and turn the unit on for a few seconds. If noise is gone, run for 30 seconds to flush.
  • Persistent harsh noise: If loud metal-on-metal noise continues with no debris present, internal components may be damaged and the disposal should be replaced.
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Repair Difficulty

Very Easy 1/5

Required Part

Grinding Chamber and Impeller Assembly
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