Upon inspection, the furnace was found to be operational, but a dirty filter was affecting its efficiency. I began by replacing the dirty filter with a new one, which improved airflow and overall performance. Next, I cleaned the flame sensor to ensure it was free from soot and debris, which is crucial for proper ignition. Additionally, I cleared any blockages in the drains to prevent water buildup, which could lead to potential damage. These steps collectively enhanced the furnace's efficiency and reliability.
