Outside Temperature Display

[zouch]

if that’s true, it would be truly stupid.

doesn’t the Auto Climate Control use that same input?

We did a Jeep Adventure Academy day a few years ago and I asked them about this - they said that the temp sensor is de-activated when in 4L because you're probably running real slow, causing heat buildup in the engine bay which would cause a false temp reading.

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[jadmt]

if that’s true, it would be truly stupid.

doesn’t the Auto Climate Control use that same input?

no the auto climate control is on the inside. this right here

the outside temp probe is inside the grill...

 

[Heimkehr]

I find mine, will read high when I first start it up. like it remembers the temp when I parked it. Will be below freezing in the morning, and I will start the Jeep, and the temp will say 50 or 60 degree's.

Exactly what mine does at startup, too. I wouldn't mind 60 degrees in the garage right now, that's for sure.

the auto climate control is on the inside. this right here

So that's what those little louvers are for! My JLU doesn't have the upper-tier HVAC functioning, and thus that particular dashboard opening doesn't have anything behind it but air.

 

[NPC 20883467]

Ok, that makes sense ... Bit instead of deactivating, they should have moved the temperature probe somewhere where the engine temp isn't an issue.

That would require spending money on a longer wire, and that kind of thinking is anathema at Stellantis.

 

[Heimkehr]

That would require spending money on a longer wire, and that kind of thinking is anathema at Stellantis.

Some years ago, I had to self-fund the purchase and installation of a Dana Spicer u-joint, with a zerk fitting, because GM couldn't spend 5 cents for the same thing on the production line.

I dodged a bullet when I discovered that the OEM u-joint was failing due to a lack of lubricity, which I couldn't reconcile sans a full parts replacement.

Thanks, accountants!

 

[NPC 20883467]

...Thanks, accountants!

Some companies absolutely refuse to be known for quality.

 

[ForgottenTaco]

I find mine, will read high when I first start it up. like it remembers the temp when I parked it. Will be below freezing in the morning, and I will start the Jeep, and the temp will say 50 or 60 degree's.

Same here. Takes a mile or two to adjust itself

 

[Bioacid]

Same here. Takes a mile or two to adjust itself

The bummer part, is sometimes when I auto start, the heated seats/steering wheel does not come on when the temp outside is below 40.

 

[Ratbert]

it is not the 4L it is the speed or lack of. it actually stated in the owners manual that the vehicle had to be driven over a certain speed before it registers...

I'm pretty sure the threshold is 25 MPH.

 

[The Duke01]

Got in the 2024 JLU for a ride to a new to me restaurant. Saw that the temperature display indicated 19° F, certainly didn't feel like it. Well, I checked it against the Davis Instruments weather station right here at home, the JL reads 5-6° less than the weather station. Close enough for me and glad to have determined the discrepancy.

How does your display read compared to another known source?

My ‘23 Rubicon JLU seems to always be lower by around 5-6°. Which a lot of time I notice is the feel like temp. So I don’t know maybe it reads that..haha?

 

[grimmjeeper]

Biggest issue with the temp sensor is that there isn't any good place to put it. In the grille you get great air flow. But you heat soak if you're not moving.

Really, anywhere near the engine has heat soak potential. Putting it on the roof (on non convertible cars) gets air flowing over it. But it's up in the direct sun which heat soaks it. And we don't have a roof. Underneath the vehicle has air flow issues, and can be affected by exhaust and hot air flowing out of the engine bay, not to mention exposure to dirt and debris, including being coated by whatever mud you drive through.

So pretty much every manufacturer puts it in the grille and just doesn't update the display until you're moving (usually 15-25 MPH). That really is the best place for it because physics.

 

[zouch]

i didn't assume the system was stupid enough to only monitor the Target temp, and may have mistakenly assumed that if was monitoring the *Input* air temp in order to have some idea of how hard it should be trying to cool,..

but that's probably me being stupid for assuming they were not.

no the auto climate control is on the inside. this right here

the outside temp probe is inside the grill...

 

[jadmt]

Biggest issue with the temp sensor is that there isn't any good place to put it. In the grille you get great air flow. But you heat soak if you're not moving.

Really, anywhere near the engine has heat soak potential. Putting it on the roof (on non convertible cars) gets air flowing over it. But it's up in the direct sun which heat soaks it. And we don't have a roof. Underneath the vehicle has air flow issues, and can be affected by exhaust and hot air flowing out of the engine bay, not to mention exposure to dirt and debris, including being coated by whatever mud you drive through.

So pretty much every manufacturer puts it in the grille and just doesn't update the display until you're moving (usually 15-25 MPH). That really is the best place for it because physics.

On the ram power wagon the sensor is in the driver side outside mirror. Works well and is accurate

 

[Timmyjoe]

Mine is pretty spot on, once I get the Jeep moving. Where I park it, it is facing south, so in the winter, being a black Jeep, when it's a sunny day, when I first start it the temp can read 5 or more degrees high. Once I start to drive it, the temp drops down to match what's on my iPhone weather app.

Best,
-Tim

 

[Wabujitsu]

i didn't assume the system was stupid enough to only monitor the Target temp, and may have mistakenly assumed that if was monitoring the *Input* air temp in order to have some idea of how hard it should be trying to cool,..

but that's probably me being stupid for assuming they were not.

Not really stupid. My house central AC, for instance - the thermostat only monitors the inside temperature. It cools or heats at full capacity until the target temperature is reached. It’s not necessary to monitor the outside temp, as it’s ideal to reach the target temp ASAP anyway.

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