To make a comparison, the next day I drove my Altima with the thermometer in the drovers vent and after the same 5 mile drive, it was down to 50 (the Altima was parked in the garage and the outside temp was 80). Had it set to max ac also. after the same hour drive, I took it off max fan, and the temp dropped to 40.
Easy. They redesigned the HVAC system for the DT trucks. They removed Heater Control Valve (HCV) and went with Ducting/Blend doors ref AC/HEAT. Removing a valve allows all that 200 degree plus water to recirculate through yer Heater Core when AC running, so your system is fighting the Heater Core to cool truck. Really stupid, sorry azz design change. That is the issue, IMHO..... REPAIR: I do not see RAM putting in a valve, because it would have to be a solenoid type, that actuates, tied into TIPM/BCM/HVAC, and programming and such. It would be an amazement if FCA did ne thing, all IMHO.....That's because your Altima AC is working very efficiently, and the RAM unit isn't. Most correctly operating modern car ACs can get down to about 41-42 even in 100 F temps.
I'll be just as interested to know the cause of the issue with the new Rams as much as how they will repair the issue.
While it doesn't change the actual vent temperatures, you're absolutely right about keeping the vents open. My wife was always closing the passenger side vents, so I started playing with the Auto A/C settings until she didn't feel like she needed to close them anymore. With the driver's side at 70 and passenger side at 73, she's comfortable and I'm plenty cool. Win-win!I had an interesting observation over the weekend. I am another case of poor A/C performance and I'll typically close vents to areas of the cab that are not occupied. It was 100+ degree day I noticed the fan blower laboring a bit at speed 7. I decided to open all the vents and it was a night and day difference, ice cold temps and the bower was a lot quieter. It took 10 minutes to cool the cab down enough to lower the fan speed. My theory, just like residential HVAC you shouldn't close vents to unoccupied rooms as this will create a back pressure on the system and cause the A/C motor to work harder and less efficient.
I won't say that I am 100% happy with the A/C performance but it did improve it substantially. I'd be interested to see if folks who are having poor A/C performance are closing off vents in their trucks.
Anyone have issues with the rear vents not blowing very hard? any tips?
Mine is analogue not digital (knob not touch screen).
While it is not as strong as the front vents like turkeybird56 said, the rear vents are ducted from the dash line. The rear vents will blow strongest when on the dash only setting. Anything else and you are diverting airflow away from the rear vents and they will not blow nearly as hard.Anyone have issues with the rear vents not blowing very hard? any tips?
Mine is analogue not digital (knob not touch screen).
Those dealers that claim they don't know about AC complaints are LYING.
Time to find other dealers that are at least honest about the issue.
You may have changed. Lol. This summer has been just as hot if not hotter and the AC miraculously has been keeping up. No vent temperatures to compare but it is much better
Sometimes these forums have a way of making you see things as worse than they really are! Go get your truck, test it out, and make your decision then. You might be disappointed in the A/C, or you might find out that your truck is perfectly comfortable!Planning on pulling the trigger on a 2020 Limited thats currently 'in transit' to the dealer.... but I've read a few pages of this thread now and I'm concerned. I'm in Florida with an 8 month old baby. I'd really like to have an efficent A/C system if I'm spending 70k on a truck.
Its okay to be concerned but Id wait til your truck actually arrives and then test drive it on a hot day and see how it feels. Wouldn't hurt to bring a thermometer with you on the test drive. Some people get trucks that have good AC, others dont. Me and my buddy are 0 for 4 on new 5th gen trucks with good AC, but you might get lucky.Planning on pulling the trigger on a 2020 Limited thats currently 'in transit' to the dealer.... but I've read a few pages of this thread now and I'm concerned. I'm in Florida with an 8 month old baby. I'd really like to have an efficent A/C system if I'm spending 70k on a truck.