MAINTENANCE TUNE-UP, FOUND BAD FAN MOTOR INSTALLED 3.5T HP AND AH. 12Y PNL.MADE SURE EQUIPMENT WAS INSTALL CORRECTLY AND WORK AREA WAS CLEAN WHEN FINISH. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, DRAINAGE, BURNER OPERATION, MOVING PARTS, FREON, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS RUNNING GOOD.