13 POINT CHECK-UP FOR 5YR HEATING SYSTEM. DID NOT PURCH SERVICE AGREEMENT. CHECK HUMIDIFIER, ENERGY CONSUMPTION, AIRFLOW, THERMOSTAT, AIR FILTER, FAN CONTROL, HIGH LIMIT CONTROL, HEAT EXCHANGER, AND ALL ELECTRICAL CONNECTIONS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. ADJUST BLOWER COMPONENTS AND LUBRICATE ALL NECESSARY MOVING PARTS. CHECK MANIFOLD GAS PRESSURE AND PROPER VENTING.