I've been cursed with my blend doors ticking for the past 4 months. First, my passenger side door went out and ticked continuously, so the dealer fixed it. I could make that door stop by changing the passenger side temperature settings. A few weeks later, my driver side started acting up but it was intermittent.

It ticked only when the cabin temp was stable and outside temps were between 50-55F. I could stop it by changing the driver side temperature. Several trips to the dealer and leaving the truck overnight yielded nothing. It was intermittent to the point the dealer couldn't reproduce it so they couldn't fix anything even though I showed them a phone recording the noise and what I did to make it stop. There appears to be 4 doors in the whole setup if I'm reading this right

Finally caught the damn thing doing it this morning while I was fueling. See where all that Climate Control Blend Door position status is bouncing around. BUSTED!
Now I can show the dealer the evidence.

I'm beginning to REALLY love this AutoEnginuity scanner. WOOT!

I stopped logging where there's a break, but decided to capture a few more seconds afterwards

 

Now that is pretty neat. Curious if they will accept that as enough evidence.