Thats the problem, I can't make the controller SHOW zone 4 any more. Except in manual mode.
Have NELSON SmartZone EZ. Owned house 6 yrs, has worked perfect,4 zones. But lately controler doesn't list zone 4, nor does the zone come on. Checked inside, all 4 zone wires are connected. Also, not as concerned about but when sprinklers do work it runs the complete program (now only 3 zones) twice. Please help