SERVICE CHECK-UP FOR 3YR HEATING UNIT UNDER SERVICE AGREEMENT. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, HUMIDIFIER, HEAT EXCHANGER, HIGH LIMIT CONTROL, GAS PRESSURE, FAN CONTROL, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. ADJUST BLOWER COMPONENTS, AND LUBRICATGE ALL NECESSARY MOVING PARTS. CLEAN AND CHECK BURNERS AND BURNER OPERATION.