System has 7 zones. I can start the dial and run through all zones but the same zone comes on. Maybe zone 4. There was a leak in the main line (on that zone that is staying on)that I repaired so there may be dirt in the lines, however I cannot find the valve for that particular zone. I couldn't even find it with a 521 valve locator. I pulled the panel off of the control box and the wiring is not original. I put the panel back on and turned the box on and now no signal is getting to the zone(s). ...
