Service call, homeowner says unit is not heating or cooling properly. Thermostat wire is frayed. Capacitor is the wrong size 4 mfd currently reading 3.8 and the motor calls for 5 mfd. Blower wheel is extremely dirty. There is biological growth on the evaporator coil. Furnace is from 1997. Clean flame sensor. Unit continues to short cycle in heat mode. Furnace control board is not displaying any sort of fault codes. Evaporator/AC is from 2006/2007. I found loose wire going to the Herm side on the capacitor. Quoted low-voltage repair and homeowner approved. Found leaky Schrader core for the liquid line. Quoted Schrader core replacement. Homeowner approved. No warranty on repairs. Recommended replacement of the system due to its age. With significant buildup on the blower motor, and the fact that the capacitor is the wrong size. The unit most likely cannot move enough airflow and it’s shutting off on high limit. The furnace control board more than likely as faulty due to no display of err