CLEAN AND CHECK 5YR HEATING UNIT UNDER 2ND SERVICE AGREEMENT. CHECK HEAT EXCHANGER, AND HIGH LIMIT CONTROL. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, ENERGY CONSUMPTION, FAN CONTROL, HUMIDIFIER, AND ALL ELECTRICAL CONNECTIONS. RENEWED SERVICE AGREEMENT.