Well, I learned that the problem is intermittent.

I stopped for a little bit in Little Rock Tuesday afternoon and the cabin heat soaked. I started it up and it quickly took the vent temp to 38 degrees. Then yesterday afternoon, with it heat soaked, it struggled to get the vent temp to 60 degrees even after several miles.

Anyone have any ideas about what could be operating intermittently? I think I am going to take out the glove box for awhile so I can look at the edge of the recirc door as Jim describes when the problem occurs again.

Any help is greatly appreciated.