Furnace Maintenance: Reccomend changing media filter for optimal air flow. UV bulb needs to be replaced, recommend changing for added uv anti bacterial benefits. Adjusted second stage gas from 3.6 to manufacture requirements of 3.5. Flushed the condensate P-trap and drain lines to maintain clear, efficient flow. Checked pressure switch tubing to ensure reliable performance. Cleaned and polished the flame sensor for optimal ignition. Ran full diagnostics to confirm the system is running smoothly and efficiently.