Air Distribution

In automatic mode, to control air distribution within the passenger compartment, the IHKA module signals the servomotor controlling the distribution flap in the heater assembly to move the flap to the appropriate position. When a specific temperature selection is set, air distribution is determined from the target air outlet temperatures. For higher target air outlet temperatures, air distribution is set to footwell only. For lower target air outlet temperatures, air distribution is set to face level only. For intermediate target air outlet temperatures, air varies the bias between the footwell and the face level outlets, in three stages, to provide a gradual transition of air distribution from footwell only to face level only. Position and movement confirmation is received from a feedback potentiometer in the air distribution servo motor.