If it does nothing and no sound be sure outlet is hot, plug is good or pump switch is bad. If it makes noise but doesnt run it is frozen either the impeller or motor. You can free up pumps, a switch may be special order. New pumps are cheap and can give you a back up. If your in no flood danger work on it, pull it out to find where it is binding . You didn`t say you heard anything so it is likely electrical as you would hear it straining to move, humming. Usualy an easy fix but since it hasn`t run in a long time you can`t know till you try.
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19 years ago