Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Lennox Harmony Zone Control Starting Boiler when it Shouldn't
I have a two-zoned home with a Lennox Harmony connected to a Lennox CBX32MV-036 with one Honeywell TH8320WF1029 per zone. Heat is provided via a hot-water coil (on the air handler) connected to a Lochinvar WHN-110. The zoning and heating work well, no issues there. But when I have the heat disabled (via the thermostats) and set the fan to on or circulate to move air around the house, the boiler starts up and house starts heating up. Any thoughts out there why this could be happening?