•  The A/C amplifier calculates the air mix actuator stop position (airflow temperature) by adding the correction input from the ECT sensor and evaporator temperature sensor to the target temperature that was calculated based on the set temperature and input from each sensor, operating the actuator.

•  The actuator stop position moves towards MAX COLD as the input temperature (heater core temperature) from the ECT sensor increases, and it moves towards MAX HOT as the input temperature from the evaporator temperature sensor (evaporator temperature) decreases.

•  The A/C amplifier maintains the actuator at the stop position calculated based on the position signal from the potentiometer inside the air mix actuator.

•  When the set temperature is at MAX HOT^*1, the air mix actuator becomes MAX HOT, when it is at MAX COLD^*2, it becomes MAX COLD.