A method of controlling a power input to a compressor clutch, via an A/C clutch voltage controller, that selectively drives an A/C compressor in a vehicle HVAC system is disclosed. The method may comprise the steps of: determining a first electric power level needed to cause the compressor clutch to move to a full engagement position from a compressor clutch non-engagement position; applying the first electric power level to the compressor clutch to cause the compressor clutch to move to the full engagement position; determining a second electric power level, which is lower than the first electric power level, needed to maintain the compressor clutch in the full engagement position; and applying the second electric power level to the compressor clutch to maintain the compressor clutch in the full engagement position.