Garbage disposal turns on by itself or does not turn off when switch is flipped

Safety first: Immediately turn OFF the circuit breaker feeding the disposal. Do not rely on the wall switch alone.

• Step 1 – Verify switch operation: With power off, remove the switch cover plate and inspect the disposal switch for signs of burning or melting.
• Step 2 – Check wiring connections: Ensure hot and load wires are correctly connected and that no bare wires are touching.
• Step 3 – Replace faulty switch: If the switch feels loose, sticks, or shows damage, replace it with a new single-pole switch rated for the disposal’s amperage.
• Step 4 – Inspect air switch (if installed): For sink-mounted air switches, check the air tubing for kinks and ensure the air switch module is not stuck. Replace if defective.
• Step 5 – Restore power and test: Turn the breaker back on and test the disposal. If it still runs without the switch, disconnect the unit and consult an electrician, as there may be a wiring fault in the circuit.