Live here almost 12yrs and think this zone has never heated up because the green lever in picture is in closed position ? All othe similar levers are running in line and work .4 total zones. Should the green lever be turned in line to operate zone ??
Thanks ,
Chris
Ps I’ll fly you out to Colorado any time payed round trip, name a rate,ski a day . Just go over my system . So many “professionals” have no idea what they are doing !