Knocking sound in passenger side dash

You are correct that this is most likely an actuator. Unfortunately there is no way to know for sure which one this is unless one of them is not operating. Like if you are not able to change the temp then it would be the temp actuator. Or if you can't change position, it would be the mode actuator.

I at attaching the process below for the mode and temp actuators. they are basically in the same area so it is not that big of a deal if you are not sure. You can just access them and then put you finger on them when they are clicking to tell which one it is.

Also, here is a guide that talks about this as well:

https://www.2carpros.com/articles/replace-blend-door-motor

Run through this material and let us know what questions you have. Thanks

Thank you so much! I’ll let you know how it turns out.

Sounds great. Thanks for the update. We will wait to hear back. Thanks