8YR HEATING UNIT TO BE CLEAN AND CHECK UNDER 2ND SERVICE AGREEMENT. CHECK THERMOSTAT, AIR FILTER, HUMIDIFIER, HEAT EXCHANGER, HUMIDIFIER, ENERGY CONSUMPTION, FAN CONTROL, GAS PRESSURE, AND ALL ELECTRICAL CONNECTIONS. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CLEAN AND CHECK BURNERS AND BURNER OPERATION.