First time user. I have a 12 years old system that runs off lake water via a pump and lake filter. I have 5 valves. Last year the center valve/zone 4 ran constantly while any of the other zones operated. So if each zone ran for 5 minutes, zone 4 then ran for a total of 25 minutes. This spring everything started up fine but in the manner described above. After about 5 weeks of operation, zone 4 will not work at all and neither will any of the other zones as a result. Any ideas? I've got Hardie (l...
