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Issue is solved, thx Valveman. The problem was in the irrigation control box. There was no output to the valves at all, should have been 24 volts. We took the box apart, there was 24v output from the transformer, none after the circuit board. My son resoldered all the joints, it now works! I...

Correct. It tries to open the valves in turn, just get a click. If I manually open the valves, the pump cycles between 28 and 50 psi every 60 seconds with the controller turned off.

I'll try to clarify. The sprinklers run when I manually open the valves. If they are closed manually, I hear the click when the system tries to open them, no flow. The shattered pipe I mentioned was because of the 25 year old pipe, first startup of the year. That is when I replaced the check...

This is a 25 year old irrigation system, I have had it for 4 years. I replaced the check valve (outside near the pump) last year after the old pvc pipe shattered. Worked fine the rest of the year. When I started it up again last month, I would get small water flow through the sprinklers with...