AC Problems

[krpenn71]

I have a 2022 Ram 2500 Tradesman gasser that has 7000 miles on it and the AC is not cooling it gets down to 60 if just sitting and only 55 when driving and goes back up to 60-62 when stopped at a light or in traffic. My other 2015 Ram 1500 gets much colder 44-45 much faster even when parked in full sun. I've taken it to 2 different dealers and the claim that everything checks out fine but it still doesnt blow cold. Anyone else have this issue?

 

[kdoublep]

Lots of threads on AC issues. I didn't think 22's had issues though. Maybe try the AC hack?

 

[BossHogg]

I have a 2022 Ram 2500 Tradesman gasser that has 7000 miles on it and the AC is not cooling it gets down to 60 if just sitting and only 55 when driving and goes back up to 60-62 when stopped at a light or in traffic. My other 2015 Ram 1500 gets much colder 44-45 much faster even when parked in full sun. I've taken it to 2 different dealers and the claim that everything checks out fine but it still doesnt blow cold. Anyone else have this issue?

The ambient temperature and humidity level directly affect the temperature from the cabin vents. When you are comparing the output of the 2015 against the 2022, is the ambient temperature the same?

A vehicle's air conditioner can only lower the incoming temperature so many degrees and your dealer should have shared that with you based on the ambient temperature during their testing.

 

[chri5k]

Comparing a R134a system to a R1234YF system. Two different refrigerants with different performance profiles. The latter is known to have performance issues. Studies show R1234YF 5-25% less cooling performance.

 

[krpenn71]

The ambient temperature and humidity level directly affect the temperature from the cabin vents. When you are comparing the output of the 2015 against the 2022, is the ambient temperature the same?

A vehicle's air conditioner can only lower the incoming temperature so many degrees and your dealer should have shared that with you based on the ambient temperature during their testing.

Sitting side by side minutes apart.

 

[krpenn71]

Comparing a R134a system to a R1234YF system. Two different refrigerants with different performance profiles. The latter is known to have performance issues. Studies show R1234YF 5-25% less cooling performance.

Actually the 2022 is R134a and the 2015 is 1234yf.

 

[BossHogg]

Comparing a R134a system to a R1234YF system. Two different refrigerants with different performance profiles. The latter is known to have performance issues. Studies show R1234YF 5-25% less cooling performance.

Can you reference those studies? I did a casual search and discovered that R134A and R1234YF offer similar results.

From: https://fjcinc.com/why-are-we-switching-over-to-r-1234yf-and-what-exactly-does-it-mean-for-techs/

"R-134a and R-1234yf do have many similar properties. That’s because R-134a is a hydrofluorocarbon (HFC) while R-1234yf is a hydrofluoro-olefin (HFO) refrigerant. Both are composed of hydrogen, fluorine and carbon atoms. The refrigeration cycles of the two refrigerants are similar because the pressure /temperature relationship of yf and R-134a are very similar."

 

[BossHogg]

Sitting side by side minutes apart.

If it were me, I'd be asking to see the reference the dealer used to say what they did, that old trust with verification thing. Based on what you are sharing, something is wrong.

 

[BossHogg]

Actually the 2022 is R134a and the 2015 is 1234yf.

I just went out and popped the hood on my two RAMs, the 2015 has a sticker indicating the refrigerant is R134A and the sticker on my 2022 says R1234YF. The 2022 was built in Michigan, the 2015 was built in Mexico. Do you suppose they use different refrigerants based on the assembly site? From what I've read, starting with MY 2021, all vehicles manufactured are required to use R1234yf.

As a note, I do not feel any differences in the cooling capabilities between the two trucks in a Michigan climate.

 

[crash68]

Comparing a R134a system to a R1234YF system. Two different refrigerants with different performance profiles. The latter is known to have performance issues. Studies show R1234YF 5-25% less cooling performance.

If the system being tested in is not specifically designed for that refrigerant then performance losses can be expected which happens in "standardized" testing.
Also a lot of the performance studies are energy consumption based, meaning if it takes more energy to produce *** amount of cooling then it has performance loss.
To the end user it comes down to the system BRU capacity on how well it cools. Manufacturers have learned with the R-12 to R134a change you can't just drop a new refrigerant in and expect the same performance. The performance difference between R-12 to R-134a was much greater than the change to R1234-YF.

 

[RamDiver]

I have a 2022 Ram 2500 Tradesman gasser that has 7000 miles on it and the AC is not cooling it gets down to 60 if just sitting and only 55 when driving and goes back up to 60-62 when stopped at a light or in traffic. My other 2015 Ram 1500 gets much colder 44-45 much faster even when parked in full sun. I've taken it to 2 different dealers and the claim that everything checks out fine but it still doesnt blow cold. Anyone else have this issue?

Regardless of the type of refrigerant used in the system and the fact that 2 dealers have presented 'no problem found' results, do we have confirmation that the condenser fan is running properly?

If while sitting at idle and you engage the Max AC, does the condenser fan start immediately and continue to run?

.

 

[krpenn71]

I was surprised when I saw that the 2022 was R134A but it seems

I just went out and popped the hood on my two RAMs, the 2015 has a sticker indicating the refrigerant is R134A and the sticker on my 2022 says R1234YF. The 2022 was built in Michigan, the 2015 was built in Mexico. Do you suppose they use different refrigerants based on the assembly site? From what I've read, starting with MY 2021, all vehicles manufactured are required to use R1234yf.

As a note, I do not feel any differences in the cooling capabilities between the two trucks in a Michigan climate.

that in the 3/4 ton that is what they're using and the 1/2 tons are 1234yf.

 

[chri5k]

Can you reference those studies? I did a casual search and discovered that R134A and R1234YF offer similar results.

From: https://fjcinc.com/why-are-we-switching-over-to-r-1234yf-and-what-exactly-does-it-mean-for-techs/

"R-134a and R-1234yf do have many similar properties. That’s because R-134a is a hydrofluorocarbon (HFC) while R-1234yf is a hydrofluoro-olefin (HFO) refrigerant. Both are composed of hydrogen, fluorine and carbon atoms. The refrigeration cycles of the two refrigerants are similar because the pressure /temperature relationship of yf and R-134a are very similar."

Radware Bot Manager Captcha

 

[Tulecreeper]

Wow, I certainly read a lot of posts complaining about the lack of A/C chill. On my 2023 2500, it pumps out cold enough that half the time I have to turn the vents away from me because it's too cold. And that's on a 100 degree day when it's super humid.

 

[RamDiver]

Wow, I certainly read a lot of posts complaining about the lack of A/C chill. On my 2023 2500, it pumps out cold enough that half the time I have to turn the vents away from me because it's too cold. And that's on a 100 degree day when it's super humid.

I have to agree. There does seem to be a huge variability in how well the AC functions with Ram trucks. My '21 Warlock could be a rolling meat locker, even when the outdoor temperatures are hot.

Then again, we don't usually get near the temperatures of Arizona, Florida, or Texas.
Sometimes we see about 104F, but rarely. Last year I measured 32F out of the vents when it was 90 something outside. I did have the recirculation enabled, though.

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[Tulecreeper]

I have to agree. There does seem to be a huge variability in how well the AC functions with Ram trucks. My '21 Warlock could be a rolling meat locker, even when the outdoor temperatures are hot.

Then again, we don't usually get near the temperatures of Arizona, Florida, or Texas.
Sometimes we see about 104F, but rarely. Last year I measured 32F out of the vents when it was 90 something outside. I did have the recirculation enabled, though.

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Recirc will definitely help. But I heard that the new trucks will only let it stay at that setting for so long, and then it automatically changes it without any input from the operator. I think it has something to do with the temp + relative humidity in the vehicle.

 

[kdoublep]

Yes it definitely does something. I don't pay much attention anymore but I get the "air" noise from passenger vent after running recirc for a bit.

 

[RamDiver]

Recirc will definitely help. But I heard that the new trucks will only let it stay at that setting for so long, and then it automatically changes it without any input from the operator. I think it has something to do with the temp + relative humidity in the vehicle.

That would be horrible.
I already find it annoying that my Ram often (but not always) resets the recirc to off during restarts.

I'm hoping to find something in AlfaOBD to correct that foolishness. I was able to fix the default recirc to on with my Tundra and a cooperative dealer using Toyota Techstream.

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[Tulecreeper]

Yes it definitely does something. I don't pay much attention anymore but I get the "air" noise from passenger vent after running recirc for a bit.

I think it also has something to do with the system trying to keep the driver from passing out from CO2 poisoning, breathing the same air over and over.

 

[Tulecreeper]

I think it also has something to do with the system trying to keep the driver from passing out from CO2 poisoning, breathing the same air over and over.

Hey, that's one of the reason I read about it. That, and the methane poisoning after a huge meal at Taco Bell.