CLEAN AND CHECK HT. CHECK THERMOSTAT, CHECK HUMIDIFIER, CHECK ALL ELECTRICAL CONNECTIONS, CHECK GAS PRESSURE AND FOR PROPER VENTING, CHECK AIR FILTER, CHECK HIGH LIMIT CONTROL, CHECK HIGH LIMIT CONTROL, CHECK HEAT EXCHANGER, CHECK BURNIERS AND BURNER OPERATION. LUBRICATE ALL NECESSARY MOVING PARTS, ADJUST BLOWER COMPONENTS. EVERYTHING IS RUNNING GREAT.