Completed furnace maintenance and inspection. I checked all components and amp draws. I tested airflow and temp splits. I cleaned up furnace and cleaned flame sensor. Inducer motor has 2 cracks in it and a hole. This causes an unsafe environment since exhaust can leak into the home from these openings. The pressure switch tube is dried out and cracking. With the holes found in the inducer casing and a dried and cracking pressure switch tube the systems performance could also be compromised causing the system to not run through the winter. I noticed the evaporator coil is rusted which can leak to refrigerant leaks possibly in the near future. I brought out field supervisor to provide in house confirmation on findings and help with solutions on what needs to happen from here.