A/c repair call for the main system. Found evaporator coil rusted and corroded and leaking refrigerant. The blower wheel is slightly dirty. The filter is good. Drain line clear. The system has no backup water safety to prevent water damage to the furnace. The outdoor system has low pressures. The system will freeze up. Electrical components outside are ok. Due to age and efficiency. Suggest replacing the full system. Having comfort advisor come out to give a quote.