"Blower Fan" Next comes the development of servo motor module. Servo motor drive is part throttle and outlet temperature of the mixed mode of the door. Independent adjustable driver's and front passenger's seat of HVAC supply air temperature with three servomotor general, one in the passenger seat side, two on the side of the driver's seat. Independent left and right controls in two types of HVAC HVAC side arrangement of three servo motor requires its own drive circuit and wiring harness. The new HVAC newly developed servo motor module, using three servo motors on the basis of the motor drive circuit harness and blend in (a). b is the appearance of a servo motor module.