PERFORMED A 13 POINT SERVICE CHECK-UP. CHECK HUMIDIFIER, ALL ELECTRICAL CONNECTIONS, GAS PRESSURE, FAN CONTROL, HEAT EXCHANGER, HIGH LIMIT CONTROL. CHECK THERMOSTAT, AIR FILTER, LUBRICATE ALL MOVING PARTS, CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK GAS PRESSURE AND FOR VENTING. EVERYTHING IS RUNNING GREAT.