Heater/AC blowing hot air at 60 or higher

[93civej1]

Sorry you keep giving long explanations of you why you think other peoples experiences are normal function of the HVAC when it’s not.

Explain to me why when the outside temperature is the mid 60s, mine blows full heat from HI to 61. To be clear when I would have it on 62, it’s FULL heat. ONLY when I drop it to all the way to LOW and then back up to 62, I get cooler temperatures. This is repeatable and has been since I’ve had the Jeep.

When I took it in to the dealer for my 10k mark I asked them to follow the exact instructions I gave above. They said supposedly they couldnt repeated it. I thought hey, maybe they did a flash and it fixed things. Got in the jeep, same thing. HI heat on every temp until 61, then only when I drop it to LOW do the temps from 61-74 reflect what they are actually set at. Note, this is with AUTO off.

Could this be a bad blend valve that is stuck until it’s put all the way in low? You’ve repaired vehicles for your whole life, I know you can come up with an explanation or theory better than what the dealer and you have told me.... it works as designed. Sorry, that’s BS.

I gotta say I agree with the above. Def not how I would expect an AC/Heat system to work. Mine does the exact thing, and its beyond stupid.
You can say over and over that its a feature. If I want to turn down from Hi to say 63, I want cool air blowing....not extreme volcano heat until i put it all the way down to low.

Even older vehicles worked how its supposed to.

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[steve68]

I'll get in on this,

Yes, hot air all over the temp range, go to LO to get it to cool, run the heat on defrost and floor to warm up the cabin, air out of the vents is scalding, I also run it in recirculating and auto, as described, run in LO then bring the numbers up to regulate the temps, not bad but the scalding is just stupid,

Yes, blasting humid air while traveling, FCA says its supposed to work this way, there's another thread on it, its annoying, and I've had it at the dealer, blah, blah is what I get from them, which is what I expected.

I live in Florida, its hot enough, I dot want hot air in my cabin......

 

[Ole Cowboy]

I got the the Glady, it was 74 outside and as soon as it started HOT air came out, instantly and I set the temp at 60 or its lowest number temp and it just got hotter. If I set it on Lo it get cooler. In town all day on business and left out temp had dropped into the mid 60's and wanted a bit of warm. Nothing but COLD air unit I set it on Hi.

There are 2 temps: Burn, Freeze, burn on 60, freeze on 80??????????

 

[EXTORTION]

Hopefully Jeep Care is watching this thread. Sounds like lots o people, including me are having this same issue. Not sure if its defective sensors, something in the computer programing or both. But my wife complains about it all the time. It's either blast furnace or a refrigerator/freezer. Not sure what changed, but Jeeps were always know for there their excellent heaters.

Please Jeep Care, helps us out

 

[PyrPatriot]

Hopefully Jeep Care is watching this thread. Sounds like lots o people, including me are having this same issue. Not sure if its defective sensors, something in the computer programing or both. But my wife complains about it all the time. It's either blast furnace or a refrigerator/freezer. Not sure what changed, but Jeeps were always know for there their excellent heaters.

Please Jeep Care, helps us out

Lots of discussion and investigations in the JL forum, Conclusion seems to be it's a feature, not a bug

 

[Ole Cowboy]

Hidden undisclosed Feature

 

[danielspivey]

Lots of discussion and investigations in the JL forum, Conclusion seems to be it's a feature, not a bug

Please discuss the details of this “feature”

 

[mellendic]

same issue here

 

[danielspivey]

Just to be clear, it is blowing full heat from HI to 61. The only way to get a 64 temp is to drop the temp to 60 or lower, and then back to 64. That is not a FEATURE, it’s a BUG.

There is no reason that you have to drop it to LOW to get 65 to actually be 65. That’s doesn’t make sense!

 

[Mr._Bill]

Just to be clear, it is blowing full heat from HI to 61. The only way to get a 64 temp is to drop the temp to 60 or lower, and then back to 64. That is not a FEATURE, it’s a BUG.

There is no reason that you have to drop it to LOW to get 65 to actually be 65. That’s doesn’t make sense!

Are you trying to control the temperature of the cab, or the temperature of the air coming out of the vents?

 

[danielspivey]

Are you trying to control the temperature of the cab, or the temperature of the air coming out of the vents?

It doesn’t matter. Why does my climate control produce a different temperature after I drop it to low when before and after it was set at 65? Dropping to low shouldn’t change the temp coming out of the vents at 65.

 

[Mr._Bill]

It doesn’t matter. Why does my climate control produce a different temperature after I drop it to low when before and after it was set at 65? Dropping to low shouldn’t change the temp coming out of the vents at 65.

It does matter. The system is designed to maintain the cab at the temperature selected on the controls. It does it by changing the temperature of the air coming out of the vents. It takes into account the outside air temperature while doing so. It may not rival the system in a Cadillac or a Lincoln, but it works fairly well for me.

 

[MrZappo]

It doesn’t matter. Why does my climate control produce a different temperature after I drop it to low when before and after it was set at 65? Dropping to low shouldn’t change the temp coming out of the vents at 65.

Sure it could. LO and HI probably take the system out of the mode where they try to make a specific cabin temp.

LO will always blow cold air. HI will always blow full hot.

Any other number will cause the system to try to make the cabin that specific temp.

If I were troubleshooting this, I'd get an accurate handheld thermometer and set the system in Auto mode and see if it does what is needed to make the cabin that temp irregardless of what you think it should be doing.

If it keeps blowing hot or cold until the cab is well beyond what you set than it is broken.

If it blows hot or cold until your cabin is the temp you set than you need to adjust expectations.

 

[PyrPatriot]

It does matter. The system is designed to maintain the cab at the temperature selected on the controls. It does it by changing the temperature of the air coming out of the vents. It takes into account the outside air temperature while doing so. It may not rival the system in a Cadillac or a Lincoln, but it works fairly well for me.

Hence the "joke" that it's a feature, not a bug when it blows very hot or very cold

 

[Davidarmen]

Many don’t seem to understand the meaning of an auto HVAC system in vehicles. The temperature you set is the temperature the vehicle is going to try to achieve. If the cabin temp sensor shows a lower ambient temperature than the temperature you set, it will blow hot air to reach your desired temperature.

It doesn’t matter if you set it to 61 degrees. If the cabin temperature sensor sees that the cabin is, for example, 40 degrees, then setting it to 61 is going to make the vehicle blow hot air until the cabin temperature reaches the desired 61 degrees.

This also works the other way around. If you set it to, for example, 80 degrees, and the cabin temperature sensor reads 90 degrees, then the system is going to blow cold air until the cabin temperature is the desired 80 degrees.

This is the operation of an automatic air conditioning system. The auto can be totally overridden by selecting Lo for Cold air no matter the cabin temperature, and Hi for Hot air no matter the cabin temperature.

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