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A/C Issues? Anyone else

I just found this discussion. I've been posting updates in the other discussions on the HVAC. Now there are at least 3 discussions going in parallel.

Fix for A/C issue??
www.hdrams.com

Fix for A/C issue??

I keep reading about the A/C issues on these trucks, and living in GA, staying cool is important. It is actually the thing that is holding me back from buying the Ram at this point. I read on one of the forums about people putting a valve in the heater hose on the 1500’s to keep the hot water...
www.hdrams.com www.hdrams.com

Constantly adjusting heat
hdrams.com

Constantly adjusting heat

I am having issues with my 2019 ram 2500 heating and air conditioning. As I am driving the temperature will not stay constant. The other day it was a little chilly outside but had to set the timpratue at 66 degrees and I could feel the passenger side was much cooler air blowing out as compared...
hdrams.com hdrams.com

A/C Issues? Anyone else
hdrams.com

A/C Issues? Anyone else

Curious as to what people are experiencing with the performance of their A/Cs. It's hot here and mine doesn't seem to blow very cold. Here's a video of comparing my 2019 Ram 3500 to a 2019 GMC sierra 1500. The GMC blows cold...
hdrams.com hdrams.com

There appears to be two possible problems:
1. I did an experiment that proves the hot engine coolant that always runs through the heater core reduces the effectiveness of the air conditioning. This may be a diesel-only problem; I don't know how the heater core loop is designed in the gas engine.
2. There seems to be a problem with the temperature sensors. This may be a problem that only affects vehicles with the dual-zone climate feature. At least 3 people, myself included, have confirmed that AlfaOBD shows the temperature sensors are not configured correctly. This could be a red-herring due to a bug in AlfaOBD, so more investigation is required.
 
Demaggg said:
55 to 60 degrees across the dash vents , dealer says he got 46? I tested it just the way he left it. 84 out side temp. My 14 Cherokee go’s right to 40. Waiting for a case worker to call me from Chrysler. Has any one had any luck?
Click to expand...
After contacting one of the RamCares people that pop up on here I was called by John today. John just kept repeating over and over that the dealer states the test results were with in factory specifications and that they stand behind the dealers test results. This was obviously a canned response. I asked him if 55 degrees at the vent was normal and just repeated him self. I called the dealer and asked them if they could show me how they measured the vent temp and he told me "no I cant do that" In his defense I didn't buy this truck from them so I'm sure it aggravated him to have me call back and question the results. Tomorrow I will show up cold to the dealer I got the truck from and ask for a tech to come out and tell me if 55 degrees is normal. I'm wondering if any one has been helped by these RamCare guys I see chiming in on the forums? There must be lots of 19 and 20 HD's with good A/C systems but god knows there are enough complaints on this forum and others as well as Face Book about poor A/C performance, that FCA must be well aware of the problem. Some have said that after an evac and refill (I suspect with a bit more Freon) their A/C blows colder. this was not offered. "John" from RamCares told me my case is now closed because my A/C is working as designed according to the dealer. I'm thinking it might be hard to get one dealer to contradict another but I'mac1.jpgac2.jpgac3.jpgac4.jpg going to try. I really like the truck but I would advise any one thinking of buying one to bring a A/C probe thermometer and make sure that sucker gets down to 46 degrees or colder because FCA is not helping people who have problems. From my conversations with them today, Ram most definitely does not care.
 
Same prob here I haven't measur7 but same response from dealer it's within spec gets down to 45
 
Mine blows cool at best. Dealer told me they got it down to 52 which was within spec... I told that dude he’s a straight up lier because using two different probes I never saw below 59*. This was on an 80* day, @RamCares let me down as well. So for now I’ve fixed it in my own. Sad that they don’t seem to give a ****.


Sent from my iPhone using Tapatalk
 
True they don't care mine today seemed ok but when it gets real Hoyt and it doesn't work sure a sh, t I'm going back and gonna perform test with them.
 
Cummins3 said:
True they don't care mine today seemed ok but when it gets real Hoyt and it doesn't work sure a sh, t I'm going back and gonna perform test with them.
Click to expand...

My advice to those taking their truck to the dealer, be sure to do the following:
1) Make sure the truck is at maximum engine temperature. Don't let them test the A/C when the truck has been sitting for a long time because the engine temperature is affecting the A/C temperature.
2) Insist they measure the temperature of the driver's side right vent. That is the vent that is the most affected by the engine temperature.
 
I tried mine for the first time this weekend. 3500 limited with HO cummins. My 2018 Chevy Cruze Diesel will freeze me out of of the car on a 100 degree day.
I had the truck on Max Air with the fan on high and it was OK but definitely not cold. Looking forward to a fix from RAM.
 
Went to dealer #2 today,. Was told it would take an hour and a half to completely test the system. 1 half hour later they call me and tell me there is nothing wrong with the truck. 50 degrees out of the passenger side center vent. 62 degree out side temp and low humidity. The service manager documented as much on the paperwork as if it’s totally normal.
 
FCA will have to admit the AC is not working properly and figure out a fix., until then all the dealer will do is see if it is working within spec... if it is, there isn't much they can do expect document.
Hopefully we can get FCAs attention on this for a fix...
 
On my truck, I can see the evap temp with a diagnostic too. I would be very interested in them trying to explain why the evap temp sensor is reading 36*-39*, but we are seeing 55*-56* vent temps. That is nearly a 20* differential, which to me would indicate an issue...
 
Really?

I thought when we put to lowest setting, the AC should keep working.
But looks like system think it already down to the temp for a wrong sensor!
I tried in winter to set hottest and it blows for ever. I have a manual HVAC controller.
 
Last edited:
TXGeorge said:
Really?

I thought when we put to lowest setting, the AC should keep working.
But looks like system think it already down to the temp for a wrong sensor!
I tried in winter to set hottest and it blows for ever. I have a manual HVAC controller.
Click to expand...
Mine does the same thing, the air blows warmer when it’s set to the lowest setting. The recirculate light goes on automatically. Told the dealer as much . I’m tired of being told that it’s normal.
 
I have to say that spending the last few days in 90-100-110F weather at Lake Pueblo in Colorado, the AC has performed "OK" for me.

That said, it's nowhere near the coldness my 03 Audi can create. However, there's a lot more cabin space to cool.

I do wish it blew harder and colder but I don't know that we're ever going to see that from these latest gen HVAC systems.
 
Came across this on the NHTSA site tonight. Seems to be what I am experiencing with my AC, "Other HVAC issues". For me, the evaporator temperature sensor is reporting 36° to 39° temperatures, while the vent temperatures are anywhere between 55° and 60°. This leads me to believe it is not a compressor issue, but rather an issue with the blend door side of the system.
https://www.nhtsa.gov/vehicle/2019/RAM/2500/PU%252FCC/4WD#manufacturerCommunications

NHTSA ID Number: 10175614

"RAM HD/CC. For AC Compressor, If you detected any issue related with: The AC blows warm air, Not Cold, Not cold enough. There is an investigation in the HVAC system If you detected an issue in the HVAC system, follow the procedure "Heating and Air Conditioning Diagnosis and Testing (A/C PERFORMANCE)" Prior to replacement compressor please check first the Temperature on the Evaporator: at 5°C +/- 2 °C & compressor cycling. If you review it and the compressor gets the temperature & it cycling, please continue to your work in other possible HVAC issue. If you have any question or you need more information you can contact us by phone or email contact FCA Redacted Content or by email: FCA Redacted Content If no response in 15 minutes, proceed with repair."
 

Attachments

Like they did mine they will check further diagnosis and check everything within spec. Until there is a recall I don't think it'll b fixed. The problem isn't blowing warm air it's not cold enough at least for me but somehow it's within spec of FCA
 
Have an appointment tomorrow, will check with them.

2019_Ram said:
Came across this on the NHTSA site tonight. Seems to be what I am experiencing with my AC, "Other HVAC issues". For me, the evaporator temperature sensor is reporting 36° to 39° temperatures, while the vent temperatures are anywhere between 55° and 60°. This leads me to believe it is not a compressor issue, but rather an issue with the blend door side of the system.
https://www.nhtsa.gov/vehicle/2019/RAM/2500/PU%252FCC/4WD#manufacturerCommunications

NHTSA ID Number: 10175614

"RAM HD/CC. For AC Compressor, If you detected any issue related with: The AC blows warm air, Not Cold, Not cold enough. There is an investigation in the HVAC system If you detected an issue in the HVAC system, follow the procedure "Heating and Air Conditioning Diagnosis and Testing (A/C PERFORMANCE)" Prior to replacement compressor please check first the Temperature on the Evaporator: at 5°C +/- 2 °C & compressor cycling. If you review it and the compressor gets the temperature & it cycling, please continue to your work in other possible HVAC issue. If you have any question or you need more information you can contact us by phone or email contact FCA Redacted Content or by email: FCA Redacted Content If no response in 15 minutes, proceed with repair."
Click to expand...
 
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