Upon arrival for service call on 1994 Trane furnace, furnace was not operational. After further diagnosis, discovered that the trap is clogged and holding water also noticed water leaking from the backside of the inducer motor. Took trap apart and blew out with drain gun also took flame sensor out and cleaned it. Furnace fired up and went through heat cycle with no faults or error but it is leaking water from the backside of inducer motor and if it makes it down to the circuitboard or the transformer it will fry the board. Performed combustion test and we may have a secondary heat exchanger, issue access air is over 300% and O2 at 16.3% and 1 to 6ppm. Offered customer a second opinion and recommended system replacement due to age and cost of repairs. Customer is definitely interested in a second opinion and possibly a system replacement. Furnace operational at departure.
