Performed full maintenance on 2022 Lennox furnace and air conditioner. Both systems are operating well at this time. Maintenance checklist: Checked and replaced furnace filter (if required) Inspected blower assembly, wheel, and motor Checked temperature rise and airflow across heat exchanger Inspected burners, flame sensor, ignition system, and gas valve operation Verified heat exchanger condition and venting system Inspected condensate drain and trap Tested all safety controls and limit switches Inspected wiring, electrical connections, and amp draws Verified proper thermostat operation and calibration Inspected refrigerant pressures, superheat, and subcooling Cleaned and inspected condenser coil and outdoor unit Checked contactor, capacitor, and outdoor fan motor operation Verified indoor coil condition (where visible) Tested humidifier operation — unit is working properly Checked overall system efficiency and operation