Ac quit blowing air

is air coming out the defrost or floor vents?

This morning it worked better than it has in a week and blew lots of cold air This afternoon on my way home it didn’t work at all and I couldn’t feel any air at the defrost or feet

I drove again this evening and the ac worked just fine I’m starting to wonder if it from sitting out in the sun all day while I’m at work that makes it stop working I mean I know that’s not the cause but maybe getting too hot makes it worse and what that would mean for what’s causing it

Did you ever figure this out? Mine just started doing this. It’s a 2013