Heater/AC blowing hot air at 60 or higher

[khokhonutt]

I've got the same problem others have described. If the temp is set to something in the 60s, as soon as the engine comes up to temp I get extremely hot air out of the vents. The only way to "fix" it is to run it all the way to LO, then slowly bump the temp up 60-61 for a few minutes, then bump it up a degree or two, wait, bump it up a degree or two, wait and hope you get to a temp that won't give you 3rd degree burns.

I sucks to have a new vehicle with these issues, especially when the 2017 RAM I traded in had HVAC issues the entire time I had it. After many trips to the dealer I finally gave up and got rid of it, so now it's someone else's problem. I guess I'll be part of the problem and not contribute to the official numbers because I don't have the time to take it to the dealership only to have them do nothing. As a long time Jeep owner it's just sad to see they continue on the path of doing nothing until the problem becomes big enough to force them to do their jobs and fix problems.

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[teneck83]

I have no issues with this....but I also use the auto mode in my Mopar's....

Using AUTO isn’t the fix. Sure, it may maintain the temperature you desire. However, a car built in 2019 that cannot allow the user to manually adjust the desired cabin temperature is a pure disappointment.

Before you jump to conclusions that your HVAC is operating as designed, fiddle with manual mode than report back. If it is indeed a software issue, I can guarantee your gladiator performs as the rest of them. Hot Air

 

[MoparDave]

Using AUTO isn’t the fix. Sure, it may maintain the temperature you desire. However, a car built in 2019 that cannot allow the user to manually adjust the desired cabin temperature is a pure disappointment.

Before you jump to conclusions that your HVAC is operating as designed, fiddle with manual mode than report back. If it is indeed a software issue, I can guarantee your gladiator performs as the rest of them. Hot Air

All I am saying, and you apparently also, is the Auto mode works just fine.

In that case I say thats "the fix", unless you MUST do manual cabin temp changes.

I got a 6 speed manual because I wanted to do my own gear changes, because its fun, but I prefer to let my Gladiator adjust the cabin temp, and it does a great job at that.

For" craps and grins" I will test out the manual temp adjustment settings.

 

[khokhonutt]

All I am saying, and you apparently also, is the Auto mode works just fine.

In that case I say thats "the fix", unless you must do manual cabin temp changes.

I got a 6 speed manual because I wanted to do my own gear changes, because its fun, but I prefer to let my Gladiator to adjust the cabin temp, and it does a great job at that.

For" craps and grins" I will test out the manual temp adjustment settings.

But does Auto also run the A/C all of the time? I noticed the light goes out for the A/C when I switch to Auto. This may not apply to all areas, but I pretty much run A/C all year round, even when I'm wanting warmer temps in the cabin. I do this because the A/C dries the air and keeps the windshield clear. This is not an issue when it's hot and A/C is on or when it's cold and full heat is on, but in moderate temps, like we see most of the year, it can sometimes be humid enough to require A/C to clear the windows.

I'd agree with the previous post that Auto is not so much a fix as it is a workaround. A fix would mean it works in both modes, which it obviously does not for those who have posted having the issue on this thread. A workaround is something you can try until an actual fix is in place.

 

[ShadowsPapa]

But does Auto also run the A/C all of the time? I noticed the light goes out for the A/C when I switch to Auto. This may not apply to all areas, but I pretty much run A/C all year round, even when I'm wanting warmer temps in the cabin. I do this because the A/C dries the air and keeps the windshield clear. This is not an issue when it's hot and A/C is on or when it's cold and full heat is on, but in moderate temps, like we see most of the year, it can sometimes be humid enough to require A/C to clear the windows.

I'd agree with the previous post that Auto is not so much a fix as it is a workaround. A fix would mean it works in both modes, which it obviously does not for those who have posted having the issue on this thread. A workaround is something you can try until an actual fix is in place.

Most modern vehicles run the AC when in defrost mode - for the reason you mention.
Even back in the 90s, maybe prior, systems used the AC to dehumidify the air. And the TSM test sequences mentioned this as well. They tell what to check and look at or for with each mode test. When you go to xx mode they say check this door, check operation of that motor, see that AC compressor is running and so on.
So unless this system is drastically different, in defrost/defog, AC would run.
Auto is meant for passenger comfort and not defrost so may not run AC except to mix air and moderate the temperature. For normal vehicles AC operates in manual or defrost mode only. Not typically auto - that's passenger comfort mode. If the windows fog, don't use auto unless these vehicles are different and without the technical service manuals - which will never be a reality these days for any vehicle, I can't say.
I dropped my huge mitchell subscription years ago as I specialize in cars prior to 2000 and couldn't justify the cost.
What I have noticed is that in auto mode it doesn't generally fog up but then it's winter in Iowa, so......... and I move to defrost mode at first sign of the windows fogging inside or out.

 

[Rubicon Bob]

On mine, I have noticed the cooler air also. Not ready to say mine is bad. On a long road trip, I felt the cooler air after the temp was set. But, it never let the interior temp go cooler than what it was set at. The wife had her side set warmer than my side. I reached over and could feel the warmer air coming out while my side was still cooler. Maybe that is why mine was cooler. When alone, I keep the temp the same on both sides. I think the temp setting is for the interior temp. It warms up by blow super hot air, then cools down the air to maintain temp. Just my opinion. Maybe right maybe wrong. But, I have not seen anyone post that they have used some type of thermometer to measure temperature of the air coming out of the vents. I currently do not have that capability, otherwise I would check it out myself.

 

[ShadowsPapa]

On mine, I have noticed the cooler air also. Not ready to say mine is bad. On a long road trip, I felt the cooler air after the temp was set. But, it never let the interior temp go cooler than what it was set at. The wife had her side set warmer than my side. I reached over and could feel the warmer air coming out while my side was still cooler. Maybe that is why mine was cooler. When alone, I keep the temp the same on both sides. I think the temp setting is for the interior temp. It warms up by blow super hot air, then cools down the air to maintain temp. Just my opinion. Maybe right maybe wrong. But, I have not seen anyone post that they have used some type of thermometer to measure temperature of the air coming out of the vents. I currently do not have that capability, otherwise I would check it out myself.

You gave me an idea - I have the thermometer I used when servicing automotive AC as well as several others I use to monitor the temps in my plating and passivate baths - I could have a thermometer in at least 4 places in the JT and compare.

 

[MoparDave]

For "craps and grins" I will test out the manual temp adjustment settings.

Well I tested mine out manually.

It works just like my other Mopars = Fine.
No issue.
No problems.
No "blowing hot air at 60 or higher."

When my Gladiator was warmed to 75 degrees (via AUTO) it blew COLD air at MANUAL 60, and WARM air at MANUAL 80.

its a non issue for my Gladiator.

Hope you guys get it sorted out, but it's not across the board.

 

[WXman]

Well I tested mine out manually.

It works just like my other Mopars = Fine.
No issue.
No problems.
No "blowing hot air at 60 or higher."

When my Gladiator was warmed to 75 degrees (via AUTO) it blew COLD air at MANUAL 60, and WARM air at MANUAL 80.

its a non issue for my Gladiator.

Hope you guys get it sorted out, but it's not across the board.

Same here. Tested today. Blew hot until truck was up to full temp then went to set temperature after that. No issues on manual mode.

 

[ShadowsPapa]

Same here. Tested today. Blew hot until truck was up to full temp then went to set temperature after that. No issues on manual mode.

MAYBE what you and MoparDave are talking about it what I am REALLY feeling - it's blowing the hot air until it reaches temp - then when ti does, it backs off to maintain that temp. It may just be taking that long to get up there. It's possible because the temp inside the cab never DROPS, it never gets cold, you just are used to the warmer air blowing then suddenly it cuts back and it's on cruise as far as HVAC goes.
Anyone who has a heat pump in their house may be able to relate - warmer air until the compressor kicks off then the fan inside keeps running until the coil cools down to less than the temp you want, then the fan gradually ramps down to off.
Forced air GAS will blow HOT air until it reaches temp then shuts off. Heat pumps never get as hot as forced air gas furnaces so you get used to cooler air than maybe your neighbor has.
The mini-split in my shop actually kicks out slightly warmer air than the Trane in the house, but then it's digital newer technology, too.

Anyway, I'll check mine but I bet it's actually ok in the end.

 

[Rubicon Bob]

On mine, I have noticed the cooler air also. Not ready to say mine is bad. On a long road trip, I felt the cooler air after the temp was set. But, it never let the interior temp go cooler than what it was set at. The wife had her side set warmer than my side. I reached over and could feel the warmer air coming out while my side was still cooler. Maybe that is why mine was cooler. When alone, I keep the temp the same on both sides. I think the temp setting is for the interior temp. It warms up by blow super hot air, then cools down the air to maintain temp. Just my opinion. Maybe right maybe wrong. But, I have not seen anyone post that they have used some type of thermometer to measure temperature of the air coming out of the vents. I currently do not have that capability, otherwise I would check it out myself.

I forgot to add that I have never used Auto mode. Only manual mode.

 

[futzin']

It's starting to sound as though Jeep designed the manual mode to operate very similarly to the auto mode. Certainly not what would be my preference, but as long as the auto works properly I could prolly live with it. WXman certainly isn't happy with his auto hvac though.

Kind of another instance of cars now doing things for us, rather than us doing them for ourselves.

 

[ShadowsPapa]

It's starting to sound as though Jeep designed the manual mode to operate very similarly to the auto mode. Certainly not what would be my preference, but as long as the auto works properly I could prolly live with it. WXman certainly isn't happy with his auto hvac though.

Kind of another instance of cars now doing things for us, rather than us doing them for ourselves.

Auto mode is what I generally run in and can't say I have complaints. I tried to use manual mode tonight while going to pick up a pizza. Unfortunately the place is only 3 miles away so the trip was short. But it was in the low 20s out, and the JT engine was operating temp before I got there. IT blew hot air for the whole trip there, and almost the whole trip back but I noticed that after I set the temp down from my wife's 71 degrees to a more reasonable 68 degrees, the hot air moderated. I have to suspect had I driven a couple more miles it could have settled down fine. The air coming out when I parked it under the lean-to for the night wasn't as hot as it was when I was driving there or back home.
Will try more things next time I get to drive it more or longer.

 

[Mr._Bill]

I don't have any issues with mine. I never use the Auto setting. I have the AC and Recirc on and the temp at 67 with air coming out just the vents. When it's hot outside, I get cold air out of the vents. When it's cold outside, I get warm air out of the vents. The air out of the vents is hot until the cabin temp stabilizes, then it moderates. I vary the fan speed between 1 and 3 and the temp between 66 and 68, depending on how warm the cabin is and how cold it is outside. I have noticed the system will periodically let fresh air in, and I can feel the colder air coming from the passenger side under the dash. If it goes on too long, I turn the recirc off and then back on again. I turn off the recirc when I park, and wait for the flap to open, so the cabin has some venting while parked. I usually remote start and give it 5 to 10 minutes to get comfortable before I depart.

 

[Gatorized]

You gave me an idea - I have the thermometer I used when servicing automotive AC as well as several others I use to monitor the temps in my plating and passivate baths - I could have a thermometer in at least 4 places in the JT and compare.

The manual indicates that the upper vents will provide cooler temps while the foot vents may be warmer... so if you have the thermometers it might be good to get the readings from high and low vents.

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