Hi Gary,
I'm sure it's the valve, nothing else. I have a backup that I put on the system and it works fine. I'd have to hook it up again to see how long it is between regenerations. I first noticed that my ice cubes were getting a crust on them and tasted very salty. Then, my neighbor came over and told me that he was home during the day and noticed that my well kept cycling on and off all day long. I noticed I had a huge wet area where I put the drain pipe. I unplugged the valve and waited until the weekend when I could watch it and see what happened. I plugged it back in and it ran through the cycle. I didn't stand there and watch it of course because it takes a while. I went back a while later when I heard the pump running and, sure enough, it was starting another backwash cycle. It may not have been a couple of hours between cycles, can't be positive about that part. But that bad boy just keeps on cyclin'!
I found my manual and in the troubleshooting section it says 10. Control Cycles Continuously. Cause: Faulty Timer Mechanism. Correction: Replace Timer.
Does that sound logical to someone, such as yourself, who knows a heck of a lot more about these bad boys than I?
Wayne