Furnace Maintenance: Tightened the bolts connected tto the ventor motor flue exhaust. Media filter was in good condition so kept it as is. 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. Noticed some built up corrosion on the hot water tank, hot pipe.