So, we had some severe weather with numerous power "blinks". My Octopus pum on my Recirc 150 wont power up when I plug it in. Think it seized up? just over heated??
take the impeller out, first thing see if the ceramic shaft is stuck, if so, soak in vinegar, etc (something you should do anyways).
Second look at the magnet itself, do you see stress lines running the same direction as the shaft? If they overheat the magnets can bulge outward. No fix for this other than replacing the impeller.
regular vinegar soakings of ANY pump are usually recommended to break down any build up of calcium and/or alkalinity material. (every few months at most)