A/C temp

If its blows colder with less air flowing from your motor then your core might be clogged. I had the opposite happen with a heater core years ago. With the fan on the lowest speed the air would be hot but as it moved more air it god cooler and cooler. Took out the core and it was plugged up with all kinds of gunk. I wouldnt think it would happen with freon or 134a but I thought I would throw it out there.