Inspected customer's 25-year-old furnace due to concerns about heat exchanger condition. Confirmed previous technician's findings of excessive rust, temperature stress, and wear where pipes connect to the manifold. Observed heat exchanger showing significant stress that presents a potential safety risk but does not yet warrant immediate condemnation. Tested and cleaned flame sensor which showed weak performance (1-1.7 µA). Scheduled service advisor for new furnace estimate and will provide separate estimate for heat exchanger and flame sensor replacement.
