First, unless those recharge kits are specifically for R1234YF systems, as opposed to R134a (which I'm almost sure they are), you can't use them on your truck.
Secondly, it's customary on forums to try searching for your particular topic of interest before posting a new thread. We have no shortage of threads on the A/C problems, such as:
Well, dropped my Ram off at the dealer for a couple of issues this week, one of them was poor A/C performance. I realized I've had my A/C on "lo" temp and recirc almost since I bought it, which is not normal. I've also noticed that the air coming out of the vents when on non-recirc feels a bit...
5thgenrams.com
PLEASE! All of you with AC issues I implore you to hit up RAM Trucks on BOTH Twitter and Facebook! My dealer performed the “TSB” update to appease me but my issues still remain. Today I posted on both Twitter and Facebook. Please do the same! Collectively we may have a better chance at a...
5thgenrams.com
I know we've heard from those with AC issues but is there anyone that does not have an issue with the AC? Their truck blows ice cold air similar to other vehicles they've owned when it's warm/hot.
5thgenrams.com
Potential work-around discussed here:
Today I was able to get 36-38 degrees blowing out of both the drivers side and the passenger side ac vents. Previously I was getting 44 out of the passenger side and 50-52 out of the driver side. I installed a water shut off valve in the heater hose going from water pump to the heater core. It's...
5thgenrams.com
Cliff's Notes: There appears to be an issue with the blend door not completely sealing off airflow through the (always hot) heater core, resulting in warm air being mixed in. This usually manifests itself with higher vent temps on the driver's side compared to the passenger side - sometimes as much as 15 degrees difference.
Dealerships, by and large, are going by a manufacturer's spec. sheet that "allows" for these higher temps, pronouncing the system as "working according to spec.", and sending the owners on their merry way. Some members have taken it upon themselves to shut off the flow of engine coolant to the heater core, resulting in much colder vent temps. This is a viable, albeit temporary (some would say "hacky") solution to the problem in the hotter months.
Anyway, read up on the linked threads, have your dealership at least give your A/C a once-over (you may actually have a low charge in the system, rather than just experiencing the blend door problem), and go from there.