Thanks for the reply. I don't think that is the problem. The controller is located right at the valves (maybe about 5 feet away on the wall adjacent to the valves, and all the valves are ganged together at the same location). The wires from the controller have a very short run to the valves.
I have a Hunter Pro-C controller with 8 zones. It came equipped for zones 1 - 3. I added expansion modules and have 8 total zones connected. The system is about 2 years old. About a year ago, zone 1 stopped turning on. There has been no change to the programming or anything else related to the installation. I already replaced the solenoid at the valve. I now operate that zone manually by turning the solenoid, but obviously this is not ideal (the dead grass in that zone can vouch for that). What ...
