Flotec intellipump Auto sensing may be hooped. Will not stop for its standard waiting cycle, it just keeps pumping. The intelliump pumps out the sump just fine but the motor keeps running. It has worked fine for six months or so. Have cleaned the anti airlock hole and checked the impeller, all seems fine. Circuit board?

SOURCE: My Flotec Model FPSC3200H-01 1/2hp

Well I know it a dirty job but someone has to did. Unhook the pump from the plumbing and take the pump out so you can see what fell into the sump pit and is lodged in the impellers.
If you have it out already turn the impiller backwords and see if that frees it up.