Is there water on the overflow sensor
Nice. Some of the replacement parts are pretty cheap, the sensors are actually free.
Having this issue now. If I click reset, pump does fill some. Top white sensor does trigger audio alarm when water level rises. But will not trigger pump when water goes below black low level sensor.If I raise the sensor above water level the pump will not start. Even if I press the reset button.
I just unplug it for a few hours and it resets itself.Past couple of years I've been getting the same thing, maybe once every 2 weeks or so.
I'm simply holding the outside magnet in place, then unplugging it and plugging it back in.
Seems to clear it for a few weeks.
Still don't know why it does it to begin with.
Also, did you clean the sensor in the sump? Mine didn't look dirty but was slimy.will try unplugging and replugging in.