Identified multiple issues with system 1. Fan speed is too high, resulting in reduced temperature drop across the coil. Reduction of fan speed is possible, but reducing the fan speed will causing additional motor windings to energize. The motor is 21 years old, the possibility of motor failure after changing fan speeds in older motors is high 2. Refrigerant ( R22 ) pressures and temperatures are elevated. Amp draw on compressor is slightly elevated 5.1 , with a 6.0 RLA. Possibly R407C has been added to the system Homeowners request a comfort specialist for free quote