Responded to a heating control issue for a homeowner. The first-floor zone was turning on by itself even though the Nest app showed it as OFF, and the basement zone damper was disconnected and stuck halfway open. We diagnosed a failing zoning control for the main floor and recommended replacing the full 3-zone system with updated smart thermostats for reliable operation. The customer was relieved to finally understand the cause and appreciated having a clear solution for long-term peace of mind.
