Temperature difference accross vents with AC on

I started to have some problems with AC not cooling well at higher temps and while idling. Do a lot of that in DFW in the evening. The air out of the passenger side vents felt warmer but I wanted to confirm. I brought my IR thermometer with me this morning and confirmed what my hand felt. 8 - 12 degree difference starting from the drivers side and increasing. I would not think the 2013 Tacomas have dual systems like some. So wondering is some difference is normal. I am going to check the temps when the truck is warm this afternoon and see if I get different temps with just fresh air.

 

Recharge fixed it. Now consistent 50 degrees or lower at all vents in 96 degree heat.