Closing out this post with a big thank you to Ron, the Hunter expert. It was an electrical problem. He diagnosed it almost instantly. (I will try to explain it here as best I can) About 2 years ago, we had someone add a zone for some backyard plantings. When the zone was added, the wire used to connect the valves was a thin wire. The other wiring was thick wiring. Over time the thin wire lost contact; the reason it would work later in the day is that when the temperature warmed sufficiently, the warmth created expansion and then the wire would get contact. Ron wrapped the thin wire around the thick wire for constant contact.
Also a big thank you to all the other great minds on this thread and TOTV overall. This is the place where smart people, creative thinkers, and true experts come together to solve problems.
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