Hi,
It sounds like the mode door actuator isn't fully working. They have a plastic gear in them, and it is very common for the teeth to strip causing a clicking sound.
Based on your description, my first suspect is the actuator needs to be replaced. I attached directions below for actuator replacement. However, I can't recall if you are able to access it from under the dash without removing the entire instrument cluster carrier. I need you to do some inspecting to determine if you can reach it.
Let me know what you find.
Joe
See pics below.
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Tuesday, November 1st, 2022 AT 8:54 PM