Service Call Fee: 29 years old Furnace, pilot will not stay lit, diagnosed failed thermocouple. replace thermocouple. system operating at this time. performed combustion analysis on system, system passes with 100ppm in exhaust, 50ppm or less in each chamber. spoke to customer about efficiency and safety concerns that come with age, system is a natural draft furnace running at 75% efficiency, customer uses propane, advised that a newer high efficiency furnace could save them cost on propane. customer would like an estimate to consider replacing
