On this job I looked at both heat and cooling. The system works in heating. But it does not test intolernace in cooling. Heater has rust build up every where Evap coil is 20 years old and is rusted all over In cooling the superheat was 57 indicating the system is starved of refrigerant. The system will provide no cooling come summer time. After talk with Miss Nancy she is just not ready to replace it. Shes more likely to replace when the system produces no cooling 🪭