I have a sprinkler valve on my system that will only turn on with the timer if I turn the water supply to that valve off and then back on once the valve opens. My husband has already replaced the solenoid and opened the valve bonnet to make sure everything is clean and not clogged or damaged. The valve works fine by manually turning it on with the screw. It also will work with the timer if I turn the manual screw on then off while the timer is on.

I do have pretty high water pressure and am wondering if high water pressure could cause the valve not to open with the timer or if maybe there is some other reason involving the internal parts that I might not be seeing.

Anybody have any ideas? Thanks!