Check the joker valves in the pump body for hair etc. Make sure the fuse isn't blown and then take the sump apart and clean the crap off the electronic float switch. You can try dropping a gallon of vinegar down the drain and let sit a few hours with power to pump off. These new electronic float switches get messed up with conditioner and soft soap. If not, take the switch out and clean the slime off of the cover. I replaced all the electronic switches with the old "float" type because the "sensor" style kept failing. Adding a washer between the switch and the sump tank works for a while but it's not permanent fix.