Garbage disposal turns on by itself intermittently or will not turn off even when the wall switch is in the OFF position.

Safety warning: This is an electrical hazard. Turn off the circuit breaker supplying the disposal before inspecting the switch or wiring.

• Step 1 – Verify switch operation: With power off, remove the switch cover plate and gently pull out the switch. Inspect for corrosion, burn marks, or loose wires.
• Step 2 – Replace faulty switch: If the switch feels loose, does not click, or shows damage, replace it with a new single-pole switch rated for the load.
• Step 3 – Check wiring: Confirm that the hot feed passes through the switch and that the neutral is not switched. Correct any miswiring according to local electrical codes.
• Step 4 – Inspect for moisture: If the switch box is in a damp area, ensure it is dry and consider installing a gasketed cover.
• Step 5 – Test operation: Restore power and verify that the disposal only runs when the switch is ON.
• Step 6 – If problem persists: There may be a wiring short in the wall or junction box. Contact a licensed electrician for further diagnosis.