Furnace Maintenance: Inspected the coil, it needs cleaning as does the blower wheel. Recommend cleaning in the spring. 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. A.C is currently out of commission.