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Starting Member


Tuesday, July 24th 2018, 11:28am

One zone stays on when the master valve is on

I have a 7 zone area and when that master valve is engaged the designated zone turns on along with zone 3. No mater what zone I turn on zone 3 also come on. This doesn't happen if I disconnect the master valve wire leading to the pump. Any thoughts?



Posts: 2,424

Location: USA


Wednesday, July 25th 2018, 2:41am

There's a problem with the zone 3 valve? Yep, find the valve and replace or repair it or maybe just adjust it. Depends.


Active Member

Posts: 42

Location: Washinton


Wednesday, July 25th 2018, 8:49pm

If zone 3 is coming on all the time, then the master valve wiring is connected to it somehow. Either a short, bad splice, is there an extra wire in the controller you can wire zone 3 to?



Posts: 2,424

Location: USA


Wednesday, July 25th 2018, 11:18pm

Does number 3 come on if you turn the master valve on manually at the valve? By opening the bleeder screw or turning the solenoid?
If yes there's a problem with the valve.


New Member


Tuesday, June 25th 2019, 3:05pm

Most likely a ruptured diaphragm on zone 3 valve is allowing water to get through to that station whenever you have any water pressure applied to your system.

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