Super tone up performed today on a Ducane heat pump with air handler installed in 2024. All electrical connections are tight with no corrosion. PSC blower motor and capacitor are acceptable. Blower wheel and evaporator coil are clean. Compressor is acceptable. Vibrations are coming from the outdoor unit. Outdoor fan blade is out of balance and causing a humming sound. Condenser fan motor was checked and bearings are tight and amp draw is acceptable. Outdoor unit was washed and waxed. Refrigerant levels are in range.