Have one zone that is giving me fits. Valve will open if I open the bleed, but not with the solenoid. The sol (a new one) works. I get 28v at the wires and I can hear water moving thru the sol bleed when activated. I also see water seeping from the heads when the valve is elecrically activated. It appears that not enough water is flowing to release the pressure above the diaphram. I have removed the guts several times and made sure the diaphram is ok and all passages are clear. I can simulte the prob by opening the manual bleed slowly. The valve will not open until the bleed is almost completely unscrewed. Has anyone run into this before? I would rather not have to replace the valve body as it is in a bad location for digging.