I have a Saniplus pump connected to a basement loo and sink. A couple of days ago it stopped pumping and only emits a hum as though it is trying to get going. I turned it off, cleaned it out. Apart from the expected gunge and some silt at the bottom there was no sign of any blockage and the macerator blades turn freely. I'm really hoping the motor hasn't burned out and that it can be repaired. Oh, it's about 10 yrs old I think. Any help out there?