The motor is trying to turn the macerating blade, but the blade is jammed. This is almost always caused by a hard object (like a toothbrush, small toy, or excessive clumps of paper) getting stuck in the impeller blades.
Have you owned a Saniflo? Did we miss your nightmare story (or success)? Drop it in the comments—we’re all ears (and rubber gloves). saniflo toilets problems
You flush, the water leaves the bowl, but the pump keeps running indefinitely until you unplug it. The motor is trying to turn the macerating