CAME OUT FOR CLEAN AND CHECK ON 20 YR HEATING UNIT. INSTALLED 5 TON HP PK 12Y PNL. ERSA. MADE SURE SYSTEM WAS INSTALLED PROPERLY, AND WORK AREA WAS CLEAN WHEN FINISH. CHECK BURNERS AND BURNER OPERATION. CHECK VOLTAGE AND AMPERAGE ON MOTORS. CHECK THERMOSTAT, HUMIDIFIER, AIR FILTER, AIRFLOW, COMPRESSOR ON DELAY SAFETY CONTROLS, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS, EVERYTHING IS RUNNING GOOD.