INVOICE SUMMARY Work Performed – Furnace Diagnostic - Performed full diagnostic due to strong exhaust odor and unsafe operation. - Inspected burners, inducer, venting, combustion air, and heat exchanger performance. - Combustion test showed extremely high flue levels, indicating severe combustion malfunction. - Findings are consistent with a severely plugged secondary heat exchanger, a known failure on this model. - Verified inducer operation; furnace is overheating and producing unsafe exhaust fumes. - Condition suggests restricted or failing secondary heat exchanger, which can cost thousands to replace. - Due to age, condition, and severity of the combustion issue, additional internal component failure is likely if only partial repairs are attempted. - Furnace shut down and red-tagged for safety. Results - Furnace is unsafe to operate. - Symptoms indicate a severely restricted secondary heat exchanger and possible additional internal failures. - We will check if any heat exchanger