Customer stated that home got very hot last night, came to home to find air handler running but no call for heat, found basement thermostat which is wired into second floor thermostat with the fan set to on, turned fan to auto. Tested zone valve which opened and closed from second floor thermostat and air handler shut off as well, tested a few times boiler came on and shut down when told so by thermostat, as of right now system is operational, customer may have a issue with thermostat she will try it and let us know.