Here is a little more information. Model number RD600-EXT, Serial 366616. Input 120Vac, Output 24Vac. The display now constantly blinks - thinking its definiately the controller - you agree? I tried listening for the valve. I couldn't tell because the water pipes thumping was pretty loud - hard to hear.
I have a Rain Dial controller - sorry, don't know the model. But I have one zone, and one zone only that rapidly turns on and off - it basically is acting like a pump. I need to know if this is a valve or controller issue. The funny thing is, is that if I manually turn on the zone - it works fine. Even works if I turn the bad zone plus another and it works. I have changed the schedule time, just to see if the scheduling works, and it works fine. But if I set this zone for 6am, I wake up hearing ...
