Heat comes on while in AC mode

[ShadowsPapa]

Produce the bulletin or bulletin number, simple as that...........

Someone did post a quote from it a while back.

That's what I keep referring to in all of these threads. I should have made a copy of that post seeing people still won't accept it.

Sponsored

 

[rayvonp]

I can’t believe it’s not butter

 

[DreamedofaJeepSomeday]

I can’t believe it’s not butter

I think this might be funny if I knew what you meant.

And, yes, I do remember the commercials. I just don't get how the reference applies here.

 

[NC_Overland]

I have noticed if the outside temperature is only a few degrees higher than the temperature setting, it blows warm air until i lower the set temperature somewhat. Don't know if this is defect or just the way it works.

Yes. That’s in agreement with the point that I was trying to make. That’s not normal! I had back to back to back to back an Audi, Mazda, BMW, and a GMC before this (and a few before that) that all had auto climate control and none of them acted like that. It was set it and forget it. I’m stubborn and try to use it, but my fiancée hates it and puts it on manual. It’s so bad that I was thinking today that I prefer the manual climate control of her car.

 

[Ted Striker]

That was pointed out as a normal thing in a message a couple of weeks or so ago - how every xx minutes it would do that by design. But seems some won't accept that explanation either.
Just because OTHER vehicles don't do this doesn't mean it's not part of the JT's HVAC. Doesn't matter how many other vehicles you've driven or owned that did not do this. It simply means they handle things differently - not that they are correct or right, or wrong. Just different.
I tried to ask people to track the timing but so far, no one but the person who posted the explanation they found that said something like 40 minutes, I believe. And it was indeed to introduce fresh air.
Everyone is an engineer and knows better than the Jeep engineers, of course. If they don't like it, then it's wrong, period.

I leave mine in auto mode and set to about 69 in the summer, about 69 or sometimes 70 in the winter.
My wife is the only one who ever changes it and she doesn't understand auto mode - so doesn't like it (sounds familiar)

Yep. No matter how many times this comes up or how many posts have been made without using the search function, there are still people that you can't convince that this is just the way it is.

Everyone has a solution:

• Use Auto and it won't do it (wrong)
• Don't use Auto and it won't do it (wrong again)
• The drain plugs are not installed letting hot air in (wrong)
• It only happens on 75 degree days with a relative humidity of 67% and 20" of barometric pressure facepalm: )
• Set the temperature to 67 degrees or below and it won't do it (wrong)
• etc., etc.

Bottom line is, right or wrong, engineering design or engineering flaw, it happens. I've had my JT for over a year now and this happens all the time, no matter what it's set at, no matter if it's freezing cold outside or 8000 degrees outside, it just happens and if you take it to Jeep, they're going to ignore you and tell you it's working as designed.

 

[DreamedofaJeepSomeday]

Yep. No matter how many times this comes up or how many posts have been made without using the search function, there are still people that you can't convince that this is just the way it is.

Everyone has a solution:

• Use Auto and it won't do it (wrong)
• Don't use Auto and it won't do it (wrong again)
• The drain plugs are not installed letting hot air in (wrong)
• It only happens on 75 degree days with a relative humidity of 67% and 20" of barometric pressure facepalm: )
• Set the temperature to 67 degrees or below and it won't do it (wrong)
• etc., etc.

Bottom line is, right or wrong, engineering design or engineering flaw, it happens. I've had my JT for over a year now and this happens all the time, no matter what it's set at, no matter if it's freezing cold outside or 8000 degrees outside, it just happens and if you take it to Jeep, they're going to ignore you and tell you it's working as designed.

I will have to take this at face value since I don't want to invest the energy to investigate it myself. (At least on the forum)

I wonder why there is nothing in the manual about this? Basically the manual implies that you can set the temperature and forget it (at least in AUTO mode), which for the average person, if I might venture to say, means that if you are asking for an inside temperature lower than the outside temperature, you would expect cold air, not hot.

OK, now another observation: If I turn on MAX AC, then after a few minutes go back to "normal AC", it sets the temperature to 60, no matter it was set to 75 previously. I have to manually adjust it back to 75. Is that normal behavior?

 

[Idok]

I just took delivery (pictures coming) of a 2020 Gladiator Overland. First trip was from Stuart, FL to Jacksonville. 237 miles one way and about 3.5 hours. Did round trip in 1.5 days. While running up and down i-95 (outside temp 89 F) Air running on Auto or NOT on Auto, set at 70 for inside, Heat started coming out from under the dash.

Both sides of the cockpit floor. So it was cold air coming out of the Dash Air vents and heat coming out from under the dash some place. Would last about 10 min than stop and would be well for another hour or so, and than it did the same thing. Trying to explain or trouble shoot this with a Tec at Jeep, will be very hard to duplicate at the dealers.

Any thoughts or suggestions on what to do?

Bob

Asking same question, of my 2021 Rubicon.
Someone said bad heat valve.
Opening or closing when it shouldn’t and letting heat in or something?

 

[Jt-wrx]

didn't look to see if this was brought up but i had unexplained heat come into my sport s floor level cooking legs and had to plug the oval drain holes to stop it, if it's not that then carry on, it was letting heat off the road and exhaust come in when windows open or ventilation could flow in cab

 

[Hipbilly]

I've noticed this in the past (I noticed cold air in the winter while running the heater, actually).... So here's what I learned on a 8hr round trip to Tulsa Friday. I didn't time it, but yes; while running the HVAC on recirculate, it periodically pulls in ambient air [I assume] to keep O2 levels up... If you notice it, and immediately turn the recirculate off, it'll go back to only blowing cold through the vents. I did this for a minute or so, then when some smelly outside would remind me, I'd turn the recirculate back on.
Its about like cancelling the ASS... its annoying, but once you get used to it, its just another chore to driving these trucks....
It was hot enough outside that the A/C would almost immediately lose its battle for comfort whenever it did it. Once I caught it and hit the button, right back to good again.

 

[ShadowsPapa]

Asking same question, of my 2021 Rubicon.
Someone said bad heat valve.
Opening or closing when it shouldn’t and letting heat in or something?

That's just someone throwing mud at the wall and seeing if it sticks. Not that there couldn't be a single person with a bad valve issue, this has actually already been addressed - it's a cycling of the system most likely to reduce evaporator freeze-up. Mine does it but only on occasion under certain conditions. It's been addressed long ago.

 

[ShadowsPapa]

I've noticed this in the past (I noticed cold air in the winter while running the heater, actually).... So here's what I learned on a 8hr round trip to Tulsa Friday. I didn't time it, but yes; while running the HVAC on recirculate, it periodically pulls in ambient air [I assume] to keep O2 levels up... If you notice it, and immediately turn the recirculate off, it'll go back to only blowing cold through the vents. I did this for a minute or so, then when some smelly outside would remind me, I'd turn the recirculate back on.
Its about like cancelling the ASS... its annoying, but once you get used to it, its just another chore to driving these trucks....
It was hot enough outside that the A/C would almost immediately lose its battle for comfort whenever it did it. Once I caught it and hit the button, right back to good again.

I don't do anything at all and in seconds, it's caught up and again blowing cool air. It normally only lasts a few seconds, enough to refresh things and then it's right back to cooling.
It's rare that mine ever does it, though. I leave it on 67 degrees in auto mode and it almost never does it unless I'm driving more than 45 minutes or an hour. Even then it doesn't always do it. First time I noticed it was 1 1/2 years after I bought the truck, heading to CO through NE and KS, then it did it 2 or 3 times on the trip. That's it - for an 11 hour trip.

Sponsored