Actuator doors not working ?

Hello, because the HVAC A/C Heater Module controls all of the actuator doors, and in both the Auto AC and Manual AC systems, the control module is on the CAN B Network, (which is going to be a body data network, I would see what data comes out of the module using a capable scan tool. It will be able to see if there are any trouble codes stored in the module, if you dont have any of the door actuators working, if the control module isnt down, it should have codes stored in it.
Also under live data for the HVAC system, you could see if any of the temperature sensors or pressure sensor are reading something within range.
I dont think you should go through the trouble of replacing any actuators if the system is down completely.
Here is a guide you can try, resetting the heater system and see if there is any change,

https://www.2carpros.com/articles/step-by-step-guide-to-reset-your-cars-hvac-system-an-essential-for-every

https://www.2carpros.com/articles/can-scan-controller-area-network-easy