CLEAN AND CHECK HEAT UNIT. INSTALLED 12 YR PREM GAS PACK WITH UV. MADE SURE EQUIPMENT WAS INSTALLED PROPERLY AND WORK AREA WAS CLEAN WHEN FINISH. CHECK BURNERS AND BURNER OPERATION. CHECK HEAT HIGH LIMIT CONTROLS. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, HUMIDIFIER, COMPRESSOR DELAY SAFETY CONTROLS, AND ALL ELECTRICAL CONNECTIONS, CHECK VOLTAGE AND AMPERAGE ON MOTORS. EVERYTHING IS RUNNING GREAT.