Sounds like you popped a fuse to me too.
I have a FLo-Jet I do not use often.. Every time it blows the dang fuse. EVERY TIME, till I remember I need to clean and lube the stupid thing.
This time I did the clean and lube before I put it away and will check it before I plug in.
I understand both Flo-Jet and Sanicon use the same pump motor. .IF so then on the non-plumbing end should be a short shaft with a screwdriver slot in it.
Note which way the thing should turn (toward the discharge port) and try to turn that shaft using a flat blade screwdriver. If it's hard to turn, you need to clean and lube.