1950s Montrose bungalow with original 2019 Trane XR14 3-ton AC unit showing reduced cooling capacity and unusual cycling pattern during recent heat wave. System struggles to maintain 75 degrees when exterior hits 95 degrees and above, runs constantly but does not achieve setpoint temperature. Need TACL-licensed technician to perform comprehensive diagnostic including refrigerant charge verification (R-410A), condenser coil inspection, blower motor amperage check, and ductwork assessment for leak...