Sewage pump runs continuously?

A pump is a pump. The pump does not know what it is pumping, or where it is pumping to. Most pumps have a "Float or a float switch" . When the liquid raises to the switch, the switch turns on the pump. The pump then pumps the liquid out until the float shuts off. If the Float gets stuck, for whatever reason ,,,it will pump forever or until it burns itself up. One thing is for sure.YOU had better start paying attention to this pump; or YOU are going to start paying $$$$$ for a new pump.