Garbage disposal hums but does not spin; some smart sink switch modules or under-sink control boxes may display E2 indicating a locked rotor or overload condition.

Safety first: Turn OFF the wall switch and shut OFF the circuit breaker. Never reach into the disposal with power on.

• Press the reset button: On most American Standard disposals, there is a red reset button on the bottom. Press it firmly until it clicks.
• Manually free the jam:
  • Insert a 1/4" Allen (hex) wrench into the hex socket at the bottom center of the motor (if equipped).
  • Turn the wrench back and forth to free the rotor. Do not use excessive force.
  • If there is no hex socket, use a wooden broom handle from the top opening to gently move the turntable back and forth.
• Remove foreign objects: With power still OFF, use tongs or pliers (not your fingers) to remove bones, metal, glass, or other debris from the grinding chamber.
• Test operation: Restore power at the breaker, run cold water, then briefly turn the switch ON. If the unit spins freely and the E2 clears, run water for 30–60 seconds.
• If humming persists: The motor windings or bearings may be damaged from overheating. In that case, replacement of the entire disposal is usually more economical than motor repair.