My son-in law replaced a bad valve yesterday. The valve comes on as soon as power is turned back on (even though timer is not set to turn it on) and has to be manually shut off at the selenoid. We removed a good selenoid from another valve and put it on the problem valve. The valve still reacts the same way. The flow arrows are not reversed and the entire valve is new. The sprinklers in that area all come on when the valve is turned on manually, but the water pressure changes. Can anyone help us...
