Furnace maintenance Inspected furnace and found 3 water leaks. Collector box is leaking, exhaust cap is leaking and condensate trap is leaking. Removed venter motor to inspect exhaust baffles and found them to be rusty. Performed a Combustion analysis and the result was 255 PPM. Explained to the customer this furnace will need to be red tagged. Provide furnace repalcement quote due to age.