diagnostic test:green light.
opened up the controller box, and dialed down the pump flow
turned it on, it started filling, and stopped when it reached the sensor.
so far, so good.
a little later, i hear the pump turn on again, and with the water touching the sensor, it just kept filling. i pulled the sensor out, wiped it clean/dry, held it touching the water, dunked it under water, but nothing stopped the pump.
i had to unplug it to stop the filling.
something isn't right
Roger, what's next?