Complete 1 System 3 Zones Lennox 80% Gas Furnace: AHS Heating Maintenance.Checked tstat and air Checked tstat and air filter. Checked Blower Motor amp draw and run cap. Checked electrical connections. No CO detected. Burners are clean. Flame sensor is clean. Checked amparage on draft motor. All safety switches are on great condition. System is running great at this time. $0. Made sure all motor dampers were working properly. Checked Blower Motor amp draw and run cap. Checked electrical connections. No CO detected. Burners are clean. Cleaned Flame sensor. Checked amparage on draft motor. All safety switches are on great condition. System is running great at this time.