With all due respect here are several points in this post that represent misunderstandings, and that may explain some of the 'overheating' concerns. I'm not trying to pick on anyone, just using this as an example of some of the misconceptions.I wish I could find a jk in my area that didn’t overheat. I would like to see what they are doing different. Every 3.6 jk I have been in, that is a half dozen, has seen 235-245 temps off road or on long uphills. Then on here people say that theirs doesn’t. I am around 3 jkurs in hunting season every year, so not during high temp times. Every one of them the temp needle starts to climb in 4lo driving into a back country spot And every one of them I can hear the fan kick on when we stop to glass an area and leave it running. So that is 226 just sitting still at an air temp in the 40’s. My fan turns on in stop a go traffic when it is single digits temp out side. Gauge doesn’t budge until 235. So if you see anything other than dead nuts center you are 10 degrees from a warning. I would be surprised if everyone says they haven’t needle seen the needle go past center. To me 235-240 is overheating. Any time the fan is over come in cooling capability and you have to alter what you are doing that is overheating. Maybe what others are saying is limp mode or a CEL indicates over heating and that is the difference.
For whatever reason the engineers designated that the fan not come on until 220 degrees or so, not sure why but really it isn't a problem. People tend to freak out whenever coolant temps exceed the thermostat setting by any amount but there really isn't any cause for concern for this as long system is operating as designed. No doubt that they could have calibrated the fan to come on screaming as soon as the coolant temp hit 195 but they didn't, probably because there is no need to. A large electric fan draws a lot of power and it could be that they simply didn't want the fan running and wasting power when it isn't necessary. For example, it is not overheating if you park an idling JK and the coolant temperature rises... it naturally will since there is no airflow until the fan eventually comes on. This is not overheating. And it doesn't matter if 235 is overheating 'to you', what matters is whether it is a problem for the engine. You will not lose coolant due to boiling until about 260 degrees, so if the engine doesn't care (and clearly the engineers are not concerned about it since that is the way the system is designed) then you don't need to, unless it impacts operation of the vehicle.
I think for the purposes of this thread we should define overheating as an event that actually affects operation of the vehicle, not simply a reading that one doesn't like or that your fan turned on. And if your vehicle is actually overheating to the point that operation of the vehicle is restricted every time you go out then something is wrong.