Dispatched for furnace tune-up. The components that are tested during the tuneup are heat exchanger, flame sensor, igniter, blower wheel, inducer, temp split and combustion in the heat exchanger. All components of the kitchen/ family room furnace are with in range of manufacture specifications. The system that is for the bedrooms has a couple of concerns. The first main concern is the Heat Exchanger. The heat exchanger has several heat stress on the out side of the chambers and corrosion on the inside where the stress marks are at. This is high indication of a heat exchanger that is about to fail. With a failed heat exchanger it can cause harmful gases to enter in to the living areas. At this time during the inspection a CO test was performed in the ambient air. There was no indication of CO at this time. The other concern is the inducer motor is over amping. The inducer motor is the component that pulls the harmful gases out of the heat exchanger and pushes the gas outside through