I installed an osmolator back in April and it's been working fine until today. The level sensor is completely above the water line but there's a green light on the unit and there's no water pumping out. When I unplug the unit and then plug it back in, the pump squirts water for about 1 second and then the green light comes back on and the unit thinks that the water level is fine. I removed the water level senso to make sure it's clean of algae but this has had no effect. Any suggestions?