So I live in Arizona, where it’s 100+ every single day. My 2019 Civic has been puzzling me with why the ac could be acting up. If I go to drive the vehicle in the morning, the a/c is ice cold. However when I go to drive it during the day after it has been sitting outside for a little bit, the a/c never truly gets cold. I went to get the A/C checked out, it blows 39 degrees while driving and 45 degrees while idling. It was looked at by the mechanic at about 9 am. The interesting thing is that during the day when I am having the A/C issues, the passenger side vents are significantly colder than the luke warm air that blows out of the driver side vents. Any insight on what could be causing my issue or what I should look at?

 

sounds like a low charge to me

 

check the compressor, it sounds like the compressor is weak. Try a test by reving at about 3k rpms and see if it gets colder.