OK a buddy had a front clip from a 4th gen Sable lying around. Been sitting outside in the weather for a year or two. So I snatched the blend door actuator thing (looked a little rusty, and it was white plastic instead of my 3rd gen's black plastic housing). Installed it, now it does NOT click, but the air temp never changes when you cycle up & down from 60* to 90*....
I made a few observations:
- The buttons for defrost, vent, floor, etc all work. When I select a different one, it always changes, and from underneath I can see the little vacuum motors moving stuff.
- The blower fan works. It can really blast that ambient temp air.
- When I cycle from max a/c
to max hot, I expect that the blend door lever would move up & down. It does not move, or even try to move, when I change the temp setting.
I suspect that the replacement blend door actuator may just be faulty from age & sitting in the elements. Any other ideas to test stuff before I go buy a new one? Or is that definitely it? Thanks for any suggestions.