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Supreme Member

Posts: 5,257

Location: Metro NYC


Sunday, June 3rd 2012, 3:40pm

throttle down the flow controls on the zone valves ~ if your zone valves do not have flow controls, buy new valves (that have flow controls)



Posts: 2,234

Location: USA


Sunday, June 3rd 2012, 5:57pm

Could you have messed up the wiring to valve 4 when you changed valve 2?

Are you sure you changed the correct valve?

Try disconnecting the wires at the valve. If valve 4 still runs then there's a problem with one of the valves.

Also do what Boots said...

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