Performed furnace clean and tune; inspected the exhaust and intake PVC ensuring all connections were secured, removed and cleaned the burners along with the flame sensor, cycled the furnace on and checked gas pressures, as well as performed a combustion test verifying no CO in the airstream. Holly did request that we replaced the #35 aprilaire water panel. I did notice the damper for the humidifier was in the summer position because of this the system was not operating. This system is currently operating normal at this time job complete