2ND 13 POINT MAINTENANCE TUNE-UP FOR HEATING UNIT. DUCT, INSTALLED ADC AND UV BULB. CHECK THERMOSTAT, HUMIDIFIER, AIR FILTER, AIRFLOW, ENERGY CONSUMPTION, COMPRESSOR DELAY SAFETY CONTROLS, AND ALL ELECTRICAL CONNECTIONS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK VOLTAGE AND AMPERAGE ON MOTORS. EVERYTHING IS RUNNING GOOD.