Today I came out for 2 system inspection. Josh is selling the house on Monday and wanted me to do full inspection on both systems. Both the main level and upstairs furnaces have cracks in the heat exchanger. I did a carbon monoxide test and both floors have up to 4ppm of carbon monoxide leaking throughout the house. Both furnace capacitors are failing. Both blower wheels are extremely impacted with dirt and debris on fan blades. Both condenser coils are heavily impacted with dirt and debris. On of the outdoor fan motors is deteriorating on top. Both AC units come on and cool. I did a full inspection, but given the ambient air temperature is below 40 degrees I was unable to get any refrigerant pressure readings.