We have a 6-zone system. Zone 2, an Irritrol 2623 3/4" valve, does not open in the cycle, while the other zones (with same valve model) work correctly. This valve has a little screw for the bleeder valve. If I open the bleeder valve with the zone off, the sprinklers come on after a few seconds, and stay on until I close the bleeder valve. If I open the bleeder valve with the zone on (say, manual on for 20 minutes), the sprinklers come on. After a few seconds, I can close the bleeder valves and t...
