Clicking nightmare HVAC systems?

This issue was addressed in the article explaining why clicking is a common problem with HVAC systems in many cars.
I researched this topic and decided this is the problem with my car and ordered the parts.
As I was attempting to locate the actuators I found the first one on the passenger side and behind the glove compartment and removed it. While I was trying to find a way to install a replacement I heard the clicking and located the actuator creating the noise but it was not the one I had removed but a different one on the drivers side and up behind the steering column. Very difficult to get to but definitely the noise maker. I was finally able to remove it and open it expecting to find a broken part but didn’t really see a problem inside.
Instead of replacing it with a new one I reinstalled the original but was only able to get one of the two screws in to hold it in place.
Since my attempts to resolve the problem I now can’t get any heat into the car but a/c is working and the clicking continues usually when the cold air is starting.
What now?