Performed the level 2 furnace and fireplace cleaning. Furnace: Burners and flame sensor are clean. Heat exchanger looks good. Combustion readings were normal. No CO detected in the air. Drain is clear. High limit passed the safety check. Heat rise was 34°. Fireplace: I vacuumed out the dust from the upper and lower compartments. Pilot assembly is clean and lighting very well. Embers were replaced. Glass was very dirty when I started, however, I was able to clean Off the dust and smears. All equipment is operating properly.