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I've had my 2015 Cherokee Trailhawk for almost a year and it's been a great vehicle honestly.

Since I bought it I've noticed the heat and AC act very strange based on throttle position/going up inclines.
AC is consistent no matter what, but if heat is on at all the Jeep's hvac slowly gets cooler or hotter sometimes.
It also gets stuck often. I had it at 78 till the Jeep warmed up and when I tried turning it down to 70 it just stayed hot for a whole minute before I turned the blower up to max and then it came down to a mixed(still not accurate) cooler temp.

Are issues like this common on the KL or do I need to get an update? Hopefully a recalibration issue that does not involve going to the dealer??

Thank You!
 

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I've had my 2015 Cherokee Trailhawk for almost a year and it's been a great vehicle honestly.

Since I bought it I've noticed the heat and AC act very strange based on throttle position/going up inclines.
AC is consistent no matter what, but if heat is on at all the Jeep's hvac slowly gets cooler or hotter sometimes.
It also gets stuck often. I had it at 78 till the Jeep warmed up and when I tried turning it down to 70 it just stayed hot for a whole minute before I turned the blower up to max and then it came down to a mixed(still not accurate) cooler temp.

Are issues like this common on the KL or do I need to get an update? Hopefully a recalibration issue that does not involve going to the dealer??

Thank You!
Yes. My HVAC (Heating/Ventilation/Air Conditioning) acts very strange too. My AC is always cold. But it shouldn't be that cold when it's 72'F outside and I set the temperature to 72'F inside. I freeze for a while, until the AC switches over to heat mode. The system acts goofy.

I've never noticed a correlation with throttle position, but I've never tried to.

Yes, the heat and AC get stuck often.

The heat and AC are slow to respond, but that's been normal even in older software versions.

I have software version 18.45.01. Do you have the same version?

I took my loaded 2016 Cherokee Trailhawk to two air conditioning repair stations yesterday. The A/C has worked weird since software update 18.45.01. Both air conditioning specialist businesses were able to manually operate all HVAC doors (e.g. recirc, blend, etc.) using their diagnostic equipment. There are no mechanical problems in the HVAC system.

But in automatic mode, the HVAC has no middle ground: it's either putting out hot air or very cold air. Prior to the software update it worked fine. It used to be able to put out warm (not hot) air and cool (not cold) air.

I spoke to a service advisor today and she agrees that the problem is software. SHe has seen this type of problem before. Unfortunately, they are unable to install a previous version. She said we just have to wait for them to release another software version.

If you have 18.45.01 and dual zone (driver/passenger) HVAC, would you please try the following and see if yours works the same? I'm really curious...

1. Start the car and rotate the fan speed knob; this puts the HVAC into manual mode. Set the Fan Speed to 1 (lowest setting).
2. Set Air Flow to Face Vents.
3. Set Temperature to Lowest setting ("Low"). Does the air get very cold after 20-30 seconds? Mine does.
4. Set Temperature to 83'F (almost the highest setting). Does the air stay very cold even though you've increased the temperature setting? Mine does. It should blend warm and cold air as you increase the temperature, but there's a software error. Right?
5. Set Temperature to the Highest Setting ("High"). Does the air finally get very hot after 20-30 seconds?
6. Set the temperature a degree to two cooler. Does the air get very cold after 20-30 seconds? Mine does. It's clearly a software error. The system doesn't blend cold and hot air with this software.

Just wondering if yours acts the same way.
 
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