Jack J
New Member
I have a Weil McLain go 90+ gas boiler controlled by a taco 406 Zvc my problem is the tstat circulator light is staying on when there is no call for heat on any of the four heat zones or on the indirect tank. I’m guessing the end switch on the controller is stuck closed but that’s a guess. Went over the wiring schematic from taco and everything looks correct. Please note the boiler worked fine until a recent issue with the icb which I changed. After change this issue started. Any advice would be greatly appreciated
