I've had to hand'start the impeller for the past several months, especially if I turn it off for feeding & then turn it back on. Now I can't even start it by hand. The magnet does have some scrapes in it but can easily turn by hand--just won't keep turning when I plug it in. As a matter of fact, when I plug it in, it flips the breaker.
I found a new one on Amazon for $79.