Garbage disposal causes noticeable shock or tingling when touching sink or faucet

Safety first: Immediately turn OFF the breaker to the disposal. Do not touch metal plumbing or the sink until the issue is resolved.

• Step 1 – Test outlet wiring: Have an electrician use a receptacle tester or multimeter to verify correct hot/neutral orientation and presence of a ground at the disposal outlet.
• Step 2 – Inspect grounding connection: For hardwired units, confirm the ground wire is securely connected to the disposal's green ground screw and to the house ground.
• Step 3 – Check for leakage: If wiring is correct, the disposal motor may be leaking current to the chassis. Replace the disposal.
• Step 4 – Verify bonding: Ensure the metal sink and plumbing are properly bonded per local electrical codes.

Warning: Shock or tingling indicates a serious safety hazard; do not use the disposal until inspected by a professional.