How do you fix a garbage disposal that is backed up?

1

Push the reset button. There's a red button on the bottom of the garbage disposal labeled reset. Push that, then turn the unit on at the wall switch. The disposal may work if enough of the clog has dissolved. If not, proceed to step 2.

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  Step 2
  Fit a hex key wrench into the hexagonal slot in the center of the disposal's bottom plate. This is a manual rotor designed for turning the impellers. Place the short end of the appropriate size hex key wrench into the slot.
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  Step 3
  Churn away the clog. Use the inserted hex key to turn the impellers to break trapped debris. Push the hex key wrench in a clockwise direction. Pull the wrench in the opposite direction. Move it back and forth if the rotor will not freely turn. The clog is actually in the disposal, which means it can be chopped apart by manually moving these impellers.
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  Step 4
  Push the wrench in alternating directions to break up the clog until a steady clockwise rotation can be established. Turn the rotor in several clockwise revolutions to be sure nothing is in the way of the disposal rotating under power. Standing water will begin to recede as the clog in the disposal clears.
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  Step 5
  Remove the hex key wrench. Run cold water into the sink. Turn on the disposal with the wall switch. The garbage disposal should work and keep the running water from collecting in the sink.