Climate control temp is off

[vincentw56]

I was fed up with mine (see my post above) and somehow it was magically fixed during my trucks stay at the dealer last week for an unrelated battery issue.

I took it in because twice in the past year I’ve had a dead battery, and twice they’ve told me nothing was wrong. Well last week it happened again and thankfully it stored two codes, an emissions code (P0456), and one for a module in the PCM not initializing correctly.

The dealer replaced my battery, reprogrammed the PCM, and now the climate control works flawlessly. I don’t know if maybe there was a software update done that the dealer didn’t note on the invoice, because I can’t imagine either of those actions would have an effect on the climate control. However, I’ve been driving the truck for three days with the system set to 68 degrees in auto and it’s been absolutely perfect. Not once have I thought about the temperature in the cab, which is the whole point of having climate control.

I don’t know if any of this is really helpful, but I would take the truck in and have it looked at because it can be fixed.

If the reprogrammed the pcm, that means they updated it. Since the climate control is controlled in software, that's probably what fixed it.

 

[Paulmug1]

Brand new truck, 500 miles. I have my climate control set to 68 however the truck pumps out massive heat for about 10-15 minutes. Then it seems to kick in and bring the temp to the setting I selected.

I’m talking, “dad why’s it so hot in here” type heat.

Does the truck need time to figure it out? Or is it possible that the dealer service center can calibrate?

I am having the same problem with my 2022 Longhorn, my old 2014 Ram 1500 worked perfectly.

 

[cevans6318]

This was mine this morning. 21 ram with 2000 miles. 66° outside, AC not an auto mode, temperature set to 75 both sides. Was blowing hot. Stuck my temperature gage in the vent, read over 100 degrees. Turned it all the way to low and within a minute gauge in vent read just under 50°. Turned it to 70°, gauge in vent read over 80°. Anything less than 70 it would blow cold anything over 70 will start blowing warm.

 

[HSKR R/T]

This was mine this morning. 21 ram with 2000 miles. 66° outside, AC not an auto mode, temperature set to 75 both sides. Was blowing hot. Stuck my temperature gage in the vent, read over 100 degrees. Turned it all the way to low and within a minute gauge in vent read just under 50°. Turned it to 70°, gauge in vent read over 80°. Anything less than 70 it would blow cold anything over 70 will start blowing warm.

It's going to blow warm until cabin temp reaches the setting on controls. If it only blew out air the temperature you have it set to, it would take forever to reach that temp, and if it's a big difference from outside temp, would never reach the set temp

 

[cevans6318]

It's going to blow warm until cabin temp reaches the setting on controls. If it only blew out air the temperature you have it set to, it would take forever to reach that temp, and if it's a big difference from outside temp, would never reach the set temp

I am NOT using auto mode. In auto, I would understand, in manual mode, it shouldn't do that. I have other vehicles and non do this.

 

[vincentw56]

This was mine this morning. 21 ram with 2000 miles. 66° outside, AC not an auto mode, temperature set to 75 both sides. Was blowing hot. Stuck my temperature gage in the vent, read over 100 degrees. Turned it all the way to low and within a minute gauge in vent read just under 50°. Turned it to 70°, gauge in vent read over 80°. Anything less than 70 it would blow cold anything over 70 will start blowing warm.

70 degrees doesn't mean it's going to blow 70 degree air. That's impossible for it to be that precise. In manual mode it works mostly like the old slider/dial that just showed a graphic on it.

 

[Paulmug1]

Mine is going to dealer today. In manual mode with AC on and temp set to 70, an instant read thermometer showed over 100 degrees. Truck was fully warmed up and had been running for about 20 minutes. To get cool, not cold, air out of the vents temp needs to be set to 64. Something isn’t right.

 

[cevans6318]

Mine is going to dealer today. In manual mode with AC on and temp set to 70, an instant read thermometer showed over 100 degrees. Truck was fully warmed up and had been running for about 20 minutes. To get cool, not cold, air out of the vents temp needs to be set to 64. Something isn’t right.

same exact issue with mine. I posted pictures above when it was happening. let us know the outcome.

 

[cevans6318]

70 degrees doesn't mean it's going to blow 70 degree air. That's impossible for it to be that precise. In manual mode it works mostly like the old slider/dial that just showed a graphic on it.

nobody said it will be precise but if my ac is set to 70 degrees and its blowing 100 out of the vents, there is a problem. That is common sense.

 

[Paulmug1]

Well here goes, dealer checked everything out and said everything was operating to specs. Couldn’t really check system out when I picked it up bc outside temp was 71 degrees vs 45 degrees this morning. With 71 degree outside temp, it seemed to be fine.

 

[wsutard1]

Well here goes, dealer checked everything out and said everything was operating to specs. Couldn’t really check system out when I picked it up bc outside temp was 71 degrees vs 45 degrees this morning. With 71 degree outside temp, it seemed to be fine.

View attachment 120702

I

Well here goes, dealer checked everything out and said everything was operating to specs. Couldn’t really check system out when I picked it up bc outside temp was 71 degrees vs 45 degrees this morning. With 71 degree outside temp, it seemed to be fine.

View attachment 120702

that is my fear every time I take it to the dealer. “Could not verify”. I took this photo today to show them when I take it in. And I set a very early appointment.

 

[Idahoktm]

I

that is my fear every time I take it to the dealer. “Could not verify”. I took this photo today to show them when I take it in. And I set a very early appointment. View attachment 120722

You have the temperature set to 68° and the vent outlet temperature is 80°. I noticed it's 48° outside. What is the temp of your temperature sensor? If it's cold soaked and not at 68°, your truck will continue to blow hotter air until the sensor gets to 68°.

 

[wsutard1]

You have the temperature set to 68° and the vent outlet temperature is 80°. I noticed it's 48° outside. What is the temp of your temperature sensor? If it's cold soaked and not at 68°, your truck will continue to blow hotter air until the sensor gets to 68°.

Where is the sensor?
No vent was pointing at the thermometer. That was ambient temp in the cab.

 

[Idahoktm]

Where is the sensor?
No vent was pointing at the thermometer. That was ambient temp in the cab.

I'm not sure where the sensor is located, but if it's cold soaked, it will continue to command warmer inlet air. My truck does the same thing after it's been sitting in the airport parking lot for 4 days. I just run it in manual mode until everything is in equilibrium. As a matter of fact, the jet I fly does this too. I've seen 110° inlet air temperatures and cabin temperatures above 80°, even though I have the temp set to 72°

 

[DuckySaurusRex]

I'm not sure where the sensor is located, but if it's cold soaked, it will continue to command warmer inlet air. My truck does the same thing after it's been sitting in the airport parking lot for 4 days. I just run it in manual mode until everything is in equilibrium. As a matter of fact, the jet I fly does this too. I've seen 110° inlet air temperatures and cabin temperatures above 80°, even though I have the temp set to 72°

you are pilot? I am pilot! And yes I agree haha. I am always dicking with the hvac controls in the jet. Its like a game to me. We even take bets on how long it will take the flight attendants to call us about the temps.

 

[Idahoktm]

you are pilot? I am pilot! And yes I agree haha. I am always dicking with the hvac controls in the jet. Its like a game to me. We even take bets on how long it will take the flight attendants to call us about the temps.

It's a never ending battle.

 

[Paulmug1]

For what it’s worth I think it is a dumb way to operate a HVAC system. On my 2014 Longhorn that I traded for this one, it didn’t mater what the outside temp was, what the ambient temp was, if it was sunny or cloudy etc… if I set the temp to 70 then it blew at 70ish. I always run the AC and recirculate during summer (I live in Houston too much humidity). I prefer to make my own decisions and not have my truck decide for me .
Oh well I guess this old dog will need to learn a new trick.

 

[HSKR R/T]

Where is the sensor?
No vent was pointing at the thermometer. That was ambient temp in the cab.

Prety sure it's an IR sensor in the dash, so it shouldn't be effected by sensor temp itself.

 

[vincentw56]

nobody said it will be precise but if my ac is set to 70 degrees and its blowing 100 out of the vents, there is a problem. That is common sense.

We will have to agree to disagree. Good luck with the dealer, I bet every thing will check out fine since it is working properly.

 

[Idahoktm]

Prety sure it's an IR sensor in the dash, so it shouldn't be effected by sensor temp itself.

Looking at the parts diagram, it appears that the temp sensor is not an IR sensor in the dash. It appears to be conventional temp sensing unit.

https://store.mopar.com/oem-parts/mopar-temperature-cabin-air-sensor-55111178ac?c=Zz1haXItY29uZGl0aW9uZXJzLWFuZC1oZWF0ZXJzJnM9YWlyLWNvbmRpdGlvbmVyLWFuZC1oZWF0ZXItY29udHJvbHMmbD0xJm49U2VhcmNoIFJlc3VsdHMmYT1yYW0mbz0xNTAwJnk9MjAyMSZ0PWxhcmFtaWUmZT01LTdsLXY4LWVsZWN0cmljLWdhcw%3D%3D