No cooling diagnostic. Turned the thermostat on then dropped the temperature to 70f. Inspect the indoor system then inspected the outdoor system, found system with 3 psig no refrigerant added some refrigerant then performed electronic leak search, found a major refrigerant leak at the evaporator coil.the evaporator coil is cover under parts warranty already verified with the vendor. Left power off to the outdoor system, diagnostic complete need to order a new coil * 3 ton complete system Extended parts and labor warranty fir basement system