Disposal makes a humming noise but does not grind, and the sink begins to fill with water.

Safety first: Turn off power at the switch and breaker. Never put your hand into the disposal.

• Clear standing water: Remove as much water from the sink as possible using a jug or sponge.
• Free the jam: Insert the correct size Allen key into the hex socket on the bottom of the McAlpine unit and work it back and forth to free the rotor.
• Remove debris from above: From the sink opening, use pliers or tongs to remove any visible bones, utensils, or hard objects.
• Reset and test: Press the reset button, restore power, run cold water, and test the unit with a brief on/off pulse.