Disposal runs but is extremely noisy with metal-on-metal grinding or rattling; some smart modules may show E7 for mechanical imbalance or loose components.

Safety first: Turn OFF the switch and shut OFF the breaker. Never attempt to catch or stop moving parts with your hand.

• Inspect chamber: Shine a flashlight into the disposal. Use tongs to remove any screws, coins, or metal fragments.
• Check impeller movement: With power OFF, use a wooden stick to gently move the impeller arms. They should pivot freely but not feel loose on the turntable.
• Listen for looseness: Gently tap the turntable with the stick. If it clanks or feels detached from the shaft, the internal mounting is compromised.
• Test briefly: Restore power, run water, and turn the unit on for 1–2 seconds. If loud metal-on-metal noise persists, shut it off immediately.
• Replace disposal: Internal grinding components on American Standard disposals are not designed for field replacement. A noisy, damaged grinding assembly requires replacement of the entire unit.