Furnace Maintenance: Replaced the media filter with a homeowner provided media filter for optimal air flow. water damage found under the collector box plug added Teflon tape secured and successfully tested without any new water. 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