CLEAN AND CHECK HT/AC. CHECK THERMOSTAT, CHECK GAS PRESSURE AND FOR PROPER VENTING, CHECK BURNERS AND BURNER OPERATION, CHECK HUMIDIFIER, CHECK HEAT EXCHANGER. CHECK CONDENSER COIL, CHECK FREON LEVELS, CHECK AIR FILTER, CHECK DRAINAGE. ADJUST BLOWER COMPONENTS, LUBRICATE ALL NECESSARY MOVING PARTS. EVERYTHING IS RUNNING GREAT. RENEWED SERVICE AGREEMENT.