Spent most of Saturday messing around with my sprinklers, still aren't
working quite right.
First noticed that one of the circuits in the back yard wasn't popping
up when it turned on. Went and looked at the valve, noticed that the
solenoid was all cracked, split, and otherwise didn't look very good.
Replaced the solenoid - same thing.
Then I noticed that the other circuit had the same problem. It's
solenoid looked OK so I didn't replace it.
Both circuits will turn on fully if I open the bleed screw. There is
no manual flow control on the valve, so no need to check that.
Put an AC voltmeter across the terminals in the controller - 28VAC
when the circuit was on. Checked the voltage at the valves - still 28
Thinking maybe the common wire had gone bad, ran a new cable from the
controller to that set of valves, rewired all the solenoids. No joy.
The set of valves that control the front yard circuits, on the other
hand, work just fine, so I don't think it's anything common in the
controller. Different cable running to the valve manifold for the
front yard, so the only differences are the valves or the wiring.
Can't think of anything else electrically-related that could be
causing my problem. I have changed all the wiring from the controller
to the valve manifold, and verified 28VAC across the solenoid wires.
Any sprinkler gurus out there got any suggestions? Can those valves
get messed up inside? Both at once? Hmm, city changed our water meter
about a month ago - could the valves be clogged inside? Why only the
back yard valves and not the front? The valves have something like 8
or 9 screws on the top, should I open them up, is there anything user-
servicable in there?
Thanks in advance for any suggestions,