Properly Performed spring/fall maintenance on a whole home system. Replaced the air filter, checked the blower wheels for built up dirt/dust, cleaned flame sensors, cleared inducer ports, tested hot surface igniters, took delta Ts, cleared drain lines, tested safety switches, tested all electrical components, tightened all electrical connections, took running volts/amps, monitored systems operations. Dirty condenser cool Dirty air ducts Properly cleaned the condenser coil