I use a 3 hp pump to fill the pond, a 2 hp out of the pond for the sprinklers, and a B&W 1500 liquid control relay to start and stop the fill system. The system worked fine for about 3 years. Now the well fills the pond nonstop. The first check was the start and stop diodes and the ground wire in the water. Everything was in place. I pulled the diode wires from the relay and it still runs. Does this eliminate the possibility of any problems with the diodes or the wiring from the relay to the diodes? What steps do I take to troubleshoot the relay? Thanks in advance for any help.