Quiet often the impeller doesn't look worn, because the wear is even. I bet if you compare the diameter of a new impeller to the old you would be surprised how much is worn off the magnet.
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Originally Posted by Biotech
I took it apart and the impeller does not look worn. The
pump, when plugged in, does not make any noise at all, so I doubt it is the impeller. I will get hold of another impeller and see what happens. Thanks for the suggestion.
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