Upon arrival customer showed location of thermostat and furnace located in the basement. Inspected blower motor amps and inspected cleanliness which the wheel was. Inspected the coil which was clean free of debris no leaks found at this time. When making way to outdoor unit found the coil clean free of debris. When testing electrical connections found all clean tight and secure. When leak searching outdoor unit found system leaking at the suction valve. Inspected condenser motor found oil residue from shaft notified customer and provided options to address it.