Performed the level 2 furnace and fireplace cleanings. Furnace: Burners and flame sensor are clean. Heat exchanger is rusty, however, no cracks located at this time. Excessive air levels were a little high, but, nothing at a concerning level currently. No CO detected in the air. Drain is clear. Heat rise was 43°. Unit is heating properly. I recommended us returning annually to monitor the heat exchanger. Fireplace: I wiped down the upper and lower compartments for dust. Cleaned the pilot. Inspected the logs, they’re good. Cleaned the glass. Cycled the fireplace. Unit is heating properly.