A/C blowing hot air out floor vents

[Sextondm]

Hey guys,
My wife's '03 X5 latest trick is to blow hot air on the driver's feet with the a/c on and blowing cold everywhere else. I've tried it in auto and manual, setting the dial all the way to blue on the center vents, changing the temp all the way up and down, all to no avail. Still blows full hot on the floor. I've heard that when the a/c is low on freon that you might get warm air from the center vents, but this feels like full hot air not just warm, and it's only from the floor vents. Not sure if the passenger side is doing it.
Any thoughts?
I did change the radiator the other day, but not sure that could be associated?