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I have a WM GV boiler with five zones. Today is a 60 degree day and I noticed that two rooms are blazing hot, even though the T-stat is set at 65. I removed the T-stat to see if that was the problem, but this one zone is still circulating, with the burner firing intermittently. All the other zones are fine.
How do I stop this until a service person can come. There are four wires to the zone valve. Is the issue the zone valve?
Any help would be appreciated.
Steve in Denver
Steve from Newton, MA