I need help to diagnose a problem. I have 6 valve system. The system has no problem running off the timer if the ground is wet. Yet if the ground is dry it will not run. Example. I can try to run the system through the timer after several dry days and the timer will cycle through but not sprinklers will come on. If I go and turn each valve on indivdually and run them the system will run off the timer after the ground or inside valve boxes are wet. They will run after it rains. But if it doesn't ...
