Question
I have 4 stations.  All 4 stopped at same time.  Changed valves on all 4 but only 2 (front) are working.  The two (back) have a clicking sound but won't sprinkle water.  Changed solinoids, unplugged & plugged in controller to delete former memory, but still no water.  Water comes through with no clicking sound only when I manually turn the screw at the top of the valve unit.  Any ideas?  My gardner and I are stumped!  Thanks!

Answer
Thanks for your question. Sorry for the delay of replying I've been busy with work.
Have you checked the voltage from the controller to the valves? From the COM terminal and any zone terminal, you should get 23-27 volts. If this checks out OK, then your problem is wiring in the field. A tiny nick in the wire insulation can cause this. Finding it is not easy. Has anyone or you been digging in the yard lately?
Good luck.

Matt