3 of 4 zones don't work, please help!
Hi, I'm a homeowner trying to figure out why 3 of my 4 zones will not work suddenly. I have a rainbird controller, and system divided into 4 zones - 3 for the front and 1 for the backyard. The backyard zone works, but the front zones won't. The solenoid for the front seems to be completely buried by mud and I can only see a valve with a tiny screw on top/in the middle of the valve for manual operation, and 4 wires (2 sets of connected wires). I can turn on the front zones manually by twisting the tiny screw on top of the valve but then water starts coming out of the valve and floods the control box, drowning the 4 wires.
I checked the voltage at the wires using my voltmeter and can read voltage there, so it does not appear to be a wiring issue or a plumbing issue since all sprinklers seem to work when I switch them on manually.
I'm a complete newbie so will appreciate any help you could provide. Thanks in advance!!