Heater/AC blowing hot air at 60 or higher

[Duke56]

I also have the scalding hot air on first running in manual. I thought it was something with the heat/temperature valve for the heater core.
Anybody ever find out why this is happening? I don’t like the AUTO mode because I found that it runs the AC to cool down cabin temp if too hot.

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[ShadowsPapa]

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.

Good idea - and that is really sort of funny because I noticed when my wife felt a bit cool in there, she changed the setting to foot vents from dash... maybe she knows something I didn't know.
I haven't read the whole manual on that as I assumed it was similar to the GC at least but seems not in that regard and yet she already knew.

 

[ShadowsPapa]

I also have the scalding hot air on first running in manual. I thought it was something with the heat/temperature valve for the heater core.
Anybody ever find out why this is happening? I don’t like the AUTO mode because I found that it runs the AC to cool down cabin temp if too hot.

That's exactly why I like the auto mode and left my Chevy set to auto almost all the time. If I want 70, I want 70 no matter what - not 80, so I expect it to cool things when it's above 70 in there and warm things if it's below 70 in there.
Like our house thermostat - it's set to run the heat pump either direction - set a temp and walk away, it chooses the mode needed to get to the temp I want. Why should I have to choose the mode - set the temp and let the system decide how to get to the temp I want.

 

[Duke56]

That's exactly why I like the auto mode and left my Chevy set to auto almost all the time. If I want 70, I want 70 no matter what - not 80, so I expect it to cool things when it's above 70 in there and warm things if it's below 70 in there.
Like our house thermostat - it's set to run the heat pump either direction - set a temp and walk away, it chooses the mode needed to get to the temp I want. Why should I have to choose the mode - set the temp and let the system decide how to get to the temp I want.

It’s still not right IMO. I’ve never had to use auto nor wanted to because of it running the AC.
Manual was always sufficient.
I’ve never had this happen in any vehicle I’ve owned until the Gladiator.
Temp’s used to be controlled by a cable and a small valve on the heater hose going to the core and a flap/door for the airflow/mix.
Now it’s all done by a wire and an IC chip.
Seems like the temperature sensing takes a while to figure out what it’s supposed to do and defaults or starts at wide open.
Also the temperature will swing from a comfortable setting to a bit on the too cool side which is when I noticed that the temp control was in auto and the AC light was on. But this also happens in manual mode.
So 2 things.
1. Initial temp when entering Jeep after warm up is WAY to high.
2. The “sensitivity” or reaction to actual cabin temp is not very responsive causing wide swings between temps.
Maybe Jeep Cares can get the HVAC engineers and computer geeks to go back to the drawing board and fix it. (I hope)

 

[Jeepfreak22]

Just want to add my JT Rubicon. Same issue. Auto is not auto. The air temp should blend as inside cab temp changes. I also will wait for a tsb as this is my only vehicle except for my motorcycle and my wife doesn’t ride.

 

[khokhonutt]

It’s still not right IMO. I’ve never had to use auto nor wanted to because of it running the AC.
Manual was always sufficient.
I’ve never had this happen in any vehicle I’ve owned until the Gladiator.
Temp’s used to be controlled by a cable and a small valve on the heater hose going to the core and a flap/door for the airflow/mix.
Now it’s all done by a wire and an IC chip.
Seems like the temperature sensing takes a while to figure out what it’s supposed to do and defaults or starts at wide open.
Also the temperature will swing from a comfortable setting to a bit on the too cool side which is when I noticed that the temp control was in auto and the AC light was on. But this also happens in manual mode.
So 2 things.
1. Initial temp when entering Jeep after warm up is WAY to high.
2. The “sensitivity” or reaction to actual cabin temp is not very responsive causing wide swings between temps.
Maybe Jeep Cares can get the HVAC engineers and computer geeks to go back to the drawing board and fix it. (I hope)

Exactly! It's frustrating to get in our 2004 Wrangler and have the HVAC work more consistently than our 2020 Gladiator. No matter how the programmers want to spin it, it's crap behavior and doing the temperature hokey pokey until the system settles in is not a solution or good explanation.

 

[Gatorized]

Exactly! It's frustrating to get in our 2004 Wrangler and have the HVAC work more consistently than our 2020 Gladiator. No matter how the programmers want to spin it, it's crap behavior and doing the temperature hokey pokey until the system settles in is not a solution or good explanation.

Wonder how the climate control is explained in the dealer sales reference manual... I’m sure if it was all explained by the engineer that designed it we would all be smacking our foreheads cause we don’t know what we are doing!

 

[Hootbro]

Wonder how the climate control is explained in the dealer sales reference manual... I’m sure if it was all explained by the engineer that designed it we would all be smacking our foreheads cause we don’t know what we are doing!

Then whoever set the requirements the engineers design this HVAC system to operate the way it does, needs to be taken behind the woodshed and beaten.

 

[Duke56]

UPDATE:
I’ve found that, in manual mode, if you do NOT have the air set to FLOOR AND DASH but use FLOOR ONLY, it does not come out blazing hot and keeps an even cabin temperature.
It’s only when you have it set to come out of both FLOOR AND DASH vents does it come out too hot.
Could be a good feature on those really chilly days for a quick warm up but I don’t think it was intended to be that way so as to scald your hands when coming out the dash vents.
I haven’t tested just the DASH ONLY setting but suspect that it would be too hot as well in that mode.
So it could very well be something to do with the mixer door not working right or defective.
I haven’t checked out AC yet either but will do later. Hope AC is OK but heard stories of AC blowing hot air too and again from dash vents.
Common denominator??? Hmmmmmmm. Hello? Jeep Cares?

 

[danielspivey]

UPDATE:
I have found that, in manual mode, if you do NOT have the heat set to blow at feet AND dash but use FEET ONLY, it does not come out blazing hot.
It’s only when you have it set to come out of both upper and lower vents does it come out too hot.
I haven’t tested just the dash vents but suspect that it would be too hot as well in that setting.
So it could very well be something to do with the mixer door not working right or defective.
I haven’t checked out AC yet either but will do later. Hope AC is OK but heard stories of AC blowing hot air too and again from dash vents.
Common denominator??? Hmmmmmmm. Hello? Jeep Cares?

In manual mode the location of air shouldn’t affect the temp that is set. Let’s see what jeepcares says!

 

[danielspivey]

Then whoever set the requirements the engineers design this HVAC system to operate the way it does, needs to be taken behind the woodshed and beaten.

With A really large stick

 

[ShadowsPapa]

In manual mode the location of air shouldn’t affect the temp that is set. Let’s see what jeepcares says!

It shouldn't but I wonder if the placement and length of the duct and proximity to the heater core matters?

 

[Duke56]

You’re right it shouldn’t but I think we already know that.
Hopefully it’s a simple design boo boo that can be a simple fix.

 

[Duke56]

With A really large stick

Oh c’mon now. It was probably a newbie design engineer and it was their first assignment. Everybody makes mistakes.
Beat their boss instead for letting it get out.

 

[nlicalsi91]

I almost just leased a 2020 Ram 1500 with all the incentives but when I went to pick it up during delivery, the carpets were soaked with water from the rain we had for 2 days straight. I walked from the deal and posted on the 5thgen ram forums. It turns out all the 2019 and 2020 Ram's are having issues with their HVAC, The AC cant seem to cool down the cabin. Its all due to the blend doors which I suspect are the same used on the gladiators as many of the knobs and dials in both trucks are the same.

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