2ND 13 POINT MAINT. TUNE-UP UNDER SERVICE AGREEMENT FOR HEATING UNIT. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK HEAT HIGH LIMIT CONTROLS. CHECK HUMIDIFIER, THERMOSTAT, AIR FILTER, AIR FLOW, COMPRESSOR DELAY SAFETY CONTROLS, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. PURCHASED IAQ ERSA. EVERYTHING IS RUNNING WELL.