2ND 13 POINT MAINTENANCE TUNE-UP UNDER SERVICE AGREEMENT FOR 3 YR HT UNIT. RENEWED SERVICE AGREEMENT. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAD PRESSURE AND FOR PROPER VENTING. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL, FAN CONTROL, THERMOSTAT, AIRFLOW, AIR FILTER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS RUNNING GREAT.