In reply to Barry.

And one more. After dropping off the grandson I then picked up one of my sons to take him to pick up his car in the shop. When I mentioned the AC was not working well he said it felt OK to him. By then it was not hot in the car so I just figured he wasn't noticing the not cold enough temperature exiting the vent.

Yesterday I thought about that. I never put my hand in front of the vents on the passenger side, only on the driver side. While the AC is working just fine at the moment, there is a perceptible difference in the driver side temperature and the passenger side. The passenger side is definitely cooler and maybe it was working OK the day I had the problem. There are separate blending doors for each side, so I'm leaning towards that as the issue.

Just another thing to fix...