Dual Zone

The HVAC control module has dual sliding temperature switches. The fuse block provides power to the right air temperature actuator through the ignition 3 voltage circuit.

When a desired temperature setting is selected, the HVAC control module outputs a voltage signal to the air temperature actuator over the control circuit of the air temperature actuator. A potentiometer inside the HVAC control module varies the voltage value on the control circuit based on the position of the air temperature switch. Based on the voltage value on the control circuit, the actuator positions the air temperature door to a to divert sufficient air around or through the heater core to achieve the desired vehicle temperature. Ground is provided by the ground circuit of the air temperature actuator.

The dual zone controls allows for maximum temperature offset between the driver and passenger. It is possible to divert maximum airflow around the heater core with one dual zone switch and divert maximum airflow through the heater core with the other dual zone switch. Each air temperature actuator is independent from the other and the passenger side is not limited in the range of temperature offset.