Received my first call from my classified ad this evening. I felt pretty confident up until now in troubleshooting. First "job" jitters I suppose, since I've run plumbing before, installed kitchens/bathrooms, and even lived in a farmnhouse for a few years where the water was from a shallow well/cistern which I took care of. Elderly man just had knee surgery. Most likely a classic problem all of you would laugh at. Zone 1 valve problem. Won't always start and sometimes stays open. Isn't certain what type of valve he has. Bought the home and the system was already in. Some RB stuff, Toro stuff, "hodgepodge" he says. Somehow I feel a need to search for the thread where someone was talking about how to get off a property! Dude's a talker. Sounds like a check the electrical and swap a valve/solenoid. I was hoping for some simple head replacements to start out with though. Any words of wisdom to share? You guys have been a great help as I've read about every post here. tnx.