Call for system freezing up, on arrival system was running, checked pressures, psi 47/176, SH49, SC5, system is low on charge 1 to 3lbs of R22, blower is dirty and covered in micro biological growth that is negatively affecting system performance, Evaporator Coil is leaking, rusted and deteriorating, system is in overall poor condition and it is recommended to consider replacing and upgrading system due to age, condition, efficiency, and the fact the system is leaking R22 refrigerant that has been phased out as of January 1, 2020. Pictures Attached.