AC Discovery - Is this normal?

[red]

I have a 2020 3500 SRW with the Cummins. Build date is 07/20.
I thought I had a weak AC system like other owners have reported. I have knobs only for controls in my Bighorn. With the AC running, and the knob in the dash/floor position, the air discharging from the dash is cool but certainly not cold.
This is how I had it set on a 70f day and it barely kept the cab cool. When I pulled up at home, I was thinking I had to take it to the dealer to get checked out when I reached for the control knob and turned it to the full dash position, The AC air discharge temp instantly dropped by about 10 degrees. Turned it back one notch to blend to the floor and dash, the discharge temp instantly went up. It seems like the AC system only works when the selector knob is in the dash position only.
Is this normal? I recall my 13 Ram 1500 was ice cold in the dash/floor position.

 

[Rockcrawlindude]

The ac sucks in these. It’s normal suckage. You can let the dealer rip your truck apart and it might get marginally better.

AC Fix TSB (Pre 8/20 build trucks)

TSB #24-001-20 UPDATED TSB: The current TSB is 24-013-21 (new parts list) https://hdrams.com/forum/index.php?threads/a-c-issues-anyone-else.573/post-44758

hdrams.com

I put ceramic tint on my truck I think it’s the best bang for the buck to help keep your truck cool.

 

[red]

The ac sucks in these. It’s normal suckage. You can let the dealer rip your truck apart and it might get marginally better.

AC Fix TSB (Pre 8/20 build trucks)

TSB #24-001-20 UPDATED TSB: The current TSB is 24-013-21 (new parts list) https://hdrams.com/forum/index.php?threads/a-c-issues-anyone-else.573/post-44758

hdrams.com

I put ceramic tint on my truck I think it’s the best bang for the buck to help keep your truck cool.

Thing is the discharge temp sucks in the blend position but is bitterly cold when in the dash only position.

 

[Brutal_HO]

Thing is the discharge temp sucks in the blend position but is bitterly cold when in the dash only position.

I wish mine was "bitterly cold" in any position,

Like @Rockcrawlerdude said, marginal even after the fix.

I had a 4runner rental earlier this week that you could hang meat in.

 

[Gondul]

I just had the TSB done and yeah.. the fix is a marginal improvement.
Looking at probably putting in the valve to close off the line during 'summer'... pretty crappy thing to do to the truck, but that seems to be the only thing that really works.

Had a Fleet Durango at work, that thing was a meat locker.

 

[Zrojas]

The TSB to fix the A/C is for all trucks built on or before July 30, 2020.

Sent from my SM-G988U1 using Tapatalk

 

[Millmutt]

I feel my system in my 2020 works just fine. Here is my technique on how I use the system. I hit the auto button and let the system decide where the airflow goes, then I over ride by adjusting the temp and or fan but I rarely touch the airflow distribution.
Use the same methodology in my other vehicles as well, seems to work for me.

 

[H3LZSN1P3R]

mine is not to bad but with the a/c on head and feet with max a/c on and recirc on it can get pretty cold in the truck