Upon completion of furnace and ac test and tune. Found a lot of corrosion on heat exchanger and failed smoke test and has high co2 reading of 130ppm going out chimney. ac evaporated coil is actively leaking and runs on R22 which is being phased out by 2020, ac compressor is starting to fail(20megohms). System is split and tied together by duct work. Blower motor for heater is belt driven, belt is about to break and blower wheel is filthy. Got Justine out to discuss unit replacement. Customer is working with warranty company for coverage on new system and will let us know what happens.